Earth and Space News

Tuesday, July 21, 2026

Dr Thomas Whitney Analyzes Aphid Midges in July 2026 TREE Fund Webinar

Summary: Dr Thomas Whitney, The Davey Tree Expert Company analyzes aphid midges in July 2026 TREE Fund Webinar with Drs Beau Brodbeck, Heath Hupke, Clayton Mahoney.

"God talks to human beings through many vectors: through each other, through organized religion, through the great books of those religions, through wise people, through art and music and literature and poetry, but nowhere with such detail and grace and color and joy as through creation. When we destroy a species, when we destroy a special place, we're diminishing our capacity to sense the divine, understand who God is and what our own potential is." Robert Francis Kennedy Jr., April 19, 2023, Boston Park Plaza Hotel, Back Bay, Boston, Massachusetts.

“And there’s many people out there who want us to move to the next planet already and I’m like, hang on, let’s not give up on this planet yet," William, Prince of Wales, July 31, 2023, Sorted Food food truck, London, England, United Kingdom.

Dr Thomas Whitney of The Davey Tree Expert Company, Kent, Ohio analyzes aphid midges in July 2026 TREE Fund Webinar Tue., Jul 21, 2026, with Drs Beau Brodbeck, Heath Hupke, Clayton Mahoney.

. . .

Acknowledgment

My special thanks to talented artists and photographers/concerned organizations who make their fine images available on the internet.

Image credits:

IMAGE 1

IMAGE 2

For further information:

Gilman, Ed. 2011. An Illustrated Guide to Pruning. Third Edition. Boston MA: Cengage.

Hayes, Ed. 2001. Evaluating Tree Defects. Revised, Special Edition. Rochester MN: Safe Trees.

Marriner, Derdriu. 21 July 2026. "Aphid Midges Are in a 3-Year Study by Dr Thomas Whitney for TREE Fund." Earth and Space News. Tuesday.
Available @ https://earth-and-space-news.blogspot.com/2026/07/dr-thomas-whitney-analyzes-aphid-midges.html

Marriner, Derdriu. 21 July 2026. "Dr Thomas Whitney Analyzes Aphid Midges in July 2026 TREE Fund Webinar." Earth and Space News. Tuesday.
Available @ https://earth-and-space-news.blogspot.com/2026/07/dr-thomas-whitney-analyzes-aphid-midges.html

Marriner, Derdriu. 24 June 2026. "Dr Daryl Chesley Adds UVM Training for Adult Learning to UAA Webinars." Earth and Space News. Wednesday.
Available @ https://earth-and-space-news.blogspot.com/2026/06/dr-daryl-chesley-adds-uvm-training-for.html

Marriner, Derdriu. 21 May 2026. "Dr Wei Zhang Advances Drought-Restricted, Water-Prescribed Young Trees and Water Conservation." Earth and Space News. Thursday.
Available @ https://earth-and-space-news.blogspot.com/2026/05/dr-wei-zhang-advances-drought.html

Marriner, Derdriu. 20 May 2026. "Chris O'Neal Adds Helicopter Trimming a Rural Co-op to UAA Webinars." Earth and Space News. Thursday.
Available @ https://earth-and-space-news.blogspot.com/2026/05/chris-oneal-adds-helicopter-trimming.html

Marriner, Derdriu. 23 April 2026. "Ali Jasper Avails American Forests Diversity as a Resourcing Solution." Earth and Space News. Thursday.
Available @ https://earth-and-space-news.blogspot.com/2026/04/ali-jasper-avails-american-forests.html

Marriner, Derdriu. 21 April 2026. "Drs Hauer, Koeser, Miesbauer Add Tree Injections as TREE Fund Webinar." Earth and Space News. Thursday.
Available @ https://earth-and-space-news.blogspot.com/2026/04/drs-hauer-koeser-miesbauer-add-tree.html

Marriner, Derdriu. 9 April 2026. "Dr Eshenaur Apprises Urban Forestry Today Host Dr Harper of 2027 Pests." Earth and Space News. Thursday.
Available @ https://earth-and-space-news.blogspot.com/2026/04/dr-eshenaur-apprises-urban-forestry_9.html

Marriner, Derdriu. 19 February 2026. "Davey Tree Expert Company Augurs Dr Orrick's Futureproof the Workforce." Earth and Space News. Thursday.
Available @ https://earth-and-space-news.blogspot.com/2026/02/davey-tree-expert-company-augurs-dr.html

Marriner, Derdriu. 19 February 2026. "Dr Brigitte Orrick Adds Futureproof the Workforce to American Forests." Earth and Space News. Thursday.
Available @ https://earth-and-space-news.blogspot.com/2026/02/dr-brigitte-orrick-adds-futureproof.html

Marriner, Derdriu. 5 February 2026. "Dr Danica Doroski Aces Tree Committees for UMass Urban Forestry Today." Earth and Space News. Thursday.
Available @ https://earth-and-space-news.blogspot.com/2026/02/dr-danica-doroski-aces-tree-committees_01178833716.html

Marriner, Derdriu. 14 October 2025. "Drs Beatley, Brodbeck, Hupke Add to TREE Fund Webinars Canopy Cities." Earth and Space News. Thursday.
Available @ https://earth-and-space-news.blogspot.com/2025/10/drs-beatley-brodbeck-hupke-add-to-tree.html

Marriner, Derdriu. 14 October 2025. "Drs Brodbeck, Brown, Hupke Add to TREE Fund Webinars Policy Strategies." Earth and Space News. Thursday.
Available @ https://earth-and-space-news.blogspot.com/2025/10/drs-brodbeck-brown-hupke-add-to-tree.html

Marriner, Derdriu. 8 October 2025. "Drs Katy Crout Moretti, Kristy McAndrew Address Baldcypress Leafroller." Earth and Space News. Thursday.
Available @ https://earth-and-space-news.blogspot.com/2025/10/drs-katy-crout-moretti-kristy-mcandrew.html

Marriner, Derdriu. 2 October 2025. "Drs Rick Harper, Deb Gilbert Are Understanding the Urban Life of Trees." Earth and Space News. Thursday.
Available @ https://earth-and-space-news.blogspot.com/2025/10/drs-rick-harper-deb-gilbert-are.html

Marriner, Derdriu. 23 July 2025. "July TREE Fund Avails Leveraging Data and Experience for Tree Equity." Earth and Space News. Wednesday.
Available @ https://earth-and-space-news.blogspot.com/2025/07/july-tree-fund-avails-leveraging-data.html

Marriner, Derdriu. 28 June 2025. "John-Ashley Reese Avails Business of Arboriculture Safety from Scratch." Earth and Space News. Wednesday.
Available @ https://earth-and-space-news.blogspot.com/2025/06/john-ashley-reese-avails-business-of.html

Marriner, Derdriu. 18 June 2025. "Rolando Orellana Adds Urban Irrigation Technology to Creciendo Arboles." Earth and Space News. Wednesday.
Available @ https://earth-and-space-news.blogspot.com/2025/06/rolando-orellana-adds-urban-irrigation_18.html

Marriner, Derdriu. 18 June 2025. "Rolando Orellana Avails Creciendo Arboles Irrigation for Urban Trees." Earth and Space News. Wednesday.
Available @ https://earth-and-space-news.blogspot.com/2025/06/rolando-orellana-avails-creciendo.html

Marriner, Derdriu. 7 June 2025. "Sharon Lilly and Alex Julius Author Tree Climbers’ Guide: Removal." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2025/06/sharon-lilly-and-alex-julius-author.html

Marriner, Derdriu. 24 May 2025. "Nick Oney Aces Fleet Management Solutions in Business of Arboriculture." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2025/05/nick-oney-aces-fleet-management.html

Marriner, Derdriu. 14 May 2025. "Patricia Robinson Aids Creciendo Arboles Identifying, Evaluating Risks." Earth and Space News. Wednesday.
Available @ https://earth-and-space-news.blogspot.com/2025/05/patricia-robinson-aids-creciendo_14.html

Marriner, Derdriu. 11 May 2025. "Thiabendazole Acts on Beech Leaf, Dutch Elm, Sycamore Anthracnose." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2025/05/thiabendazole-acts-on-beech-leaf-dutch.html

Marriner, Derdriu. 10 May 2025. "Dr. Cadaval Aces Storm Collaboration and Preparedness for TREE Fund." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2025/05/dr-cadaval-aces-storm-collaboration-and.html

Marriner, Derdriu. 24 April 2025. "Chris Francis Aces Productive Work Force in Business of Arboriculture." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2025/04/chris-francis-aces-productive-work.html

Marriner, Derdriu. 13 April 2025. "Marge Daughtrey and Dan Gilrein Ace 2025 Landscape Pests for UMass UFT." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2025/04/marge-daughtrey-and-dan-gilrein-ace.html

Marriner, Derdriu. 12 April 2025. "Carolyn Mahan Aces IVM on Electric Transmission line ROW for TREE Fund." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2025/04/carolyn-mahan-aces-ivm-on-electric.html

Marriner, Derdriu. 9 April 2025. "Vicki Mendez Aids Creciendo Arboles Trees Affected by Invasive Species." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2025/04/vicki-mendez-aids-creciendo-arboles_9.html

Marriner, Derdriu. 5 April 2025. "Part Two to Tree Inventory BMP Avails Us a Successful Tree Inventory." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2025/04/part-two-to-tree-inventory-bmp-avails.html

Marriner, Derdriu. 29 March 2025. "Tree Care as Business Form Adds Tax Obligations, Deductions, Credits." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2025/03/tree-care-as-business-form-adds-tax.html

Marriner, Derdriu. 16 March 2025. "Hydraulic Conductivity Affects Plant and Root Water Potential." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2025/03/hydraulic-conductivity-affects-plant.html

Marriner, Derdriu. 15 March 2025. "Plant and Root Hydraulic Systems Act Together About Water Potential." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2025/03/plant-and-root-hydraulic-systems-act.html

Marriner, Derdriu. 9 March 2025. "Hurricane Wind Resistance Rating, Machine Learning and Tree Species." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2025/03/hurricane-wind-resistance-rating.html

Marriner, Derdriu. 8 March 2025. "Beau Brodbeck Avails Creciendo Arboles Construction-amiable Tree Care." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2025/03/beau-brodbeck-avails-creciendo-arboles.html

Marriner, Derdriu. 2 March 2025. "Matthew Searels and Jessie McClellan Apprise Brand and Sales Etiquette." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2025/03/matthew-searels-and-jessie-mcclellan.html

Marriner, Derdriu. 1 March 2025. "Soils Aid James Cassidy and EPA IPM Getting to the Root of the Problem." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2025/03/soils-aid-james-cassidy-and-epa-ipm.html

Marriner, Derdriu. 9 February 2025. "Arborist News February 2025 Airs Weathering the Storm by Warren Causey." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2025/02/arborist-news-february-2025-airs.html

Marriner, Derdriu. 4 January 2025. "How Are Two Magnolia, Two Maple Species’ Fine Roots After Waterlogging?" Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2025/01/how-are-two-magnolia-two-maple-species.html

Marriner, Derdriu. 7 December 2024. "December 2024 Arborist News Apprises Us of Tree Inventory BMP Part I." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2024/12/december-2024-arborist-news-apprises-us.html

Marriner, Derdriu. 17 November 2024. "Pruning Cuts Aid Codominant Stem Diameter Ratio, Exposed Wood, Appeal." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2024/11/pruning-cuts-aid-codominant-stem.html

Marriner, Derdriu. 6 October 2024. "Heartwood, Part I, Airs Biology, Formation, Identification, Importance." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2024/10/heartwood-part-i-airs-biology-formation.html

Marriner, Derdriu. 8 September 2024. "Conflict and Collaboration in Urban Forest Management Affect Each Other." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2024/09/conflict-and-collaboration-in-urban.html

Marriner, Derdriu. 4 August 2024. "Aged, Dead, Exotic Aid Taking an Ecosystem Approach to Tree Management" Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2024/08/aged-dead-exotic-aid-taking-ecosystem.html

Marriner, Derdriu. 7 July 2024. "What For Tree Workers Acts For and Against Professional Certification?" Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2024/07/what-for-tree-workers-acts-for-and.html

Marriner, Derdriu. 2 June 2024. "Tree Risk Assessment BMPs Address Target, Occupancy, Impact Likelihood." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2024/05/tree-root-architecture-acts-for.html

Marriner, Derdriu. 5 May 2024. "Tree Root Architecture Acts for Proactive Urban Green Space Design." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2024/05/tree-root-architecture-acts-for.html

Marriner, Derdriu. 7 April 2024. "Tree Risk Assessment Admits Best Management Practices Abbreviated BMPs." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2024/04/tree-risk-assessment-admits-best.html

Marriner, Derdriu. 3 March 2024. "Foliar Tissue Addresses Acer Heat Tolerance When Planning Urban Maples." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2024/03/foliar-tissue-addresses-acer-heat.html

Marriner, Derdriu. 4 February 2024. "Utility Tree Risk Asks About Target Strike, Then Tree Failure." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2024/02/utility-tree-risk-asks-about-target.html

Marriner, Derdriu. 18 January 2024. "System Failure From Ailing Water Transport Advises How Trees Grow Old." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2024/01/system-failure-from-ailing-water.html

Marriner, Derdriu. 6 January 2024. "Neighborhood-Scale Urban Forest Scenarios Aid Vancouver, Canada 2050." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2024/01/neighborhood-scale-urban-forest.html

Marriner, Derdriu. 2 December 2023. "Selection, Timing and Application Assure Shrub and Tree Fertilization." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2023/12/selection-timing-and-application-assure.html

Marriner, Derdriu. 4 November 2023. "Diverse, Ecoservicing, Resilient Urban Tree Trifecta Aid Dense Cities." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2023/11/diverse-ecoservicing-resilient-urban.html

Marriner, Derdriu. 7 October 2023. "Utility Tree Risk Assessment Applies to Trees, Targets and Site." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2023/10/utility-tree-risk-assessment-applies-to.html

Marriner, Derdriu. 2 September 2023. "Urban Forest Resilience Asks Species Diversity of Milwaukee Metropolitan Area." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2023/09/urban-forest-resilience-asks-species.html

Marriner, Derdriu. 5 August 2023. "Tree Roots with Secondary Thickening Are Tree Species Identifiers." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2023/08/tree-roots-with-secondary-thickening.html

Marriner, Derdriu. 15 July 2023. "Soil Decompaction and Soil Amendments Affect Urban Soil Quality." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2023/07/soil-decompaction-and-soil-amendments.html

Marriner, Derdriu. 24 June 2023. "Best Practices Affect Nonselective and Selective Root Pruning." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2023/06/best-practices-affect-nonselective-and.html

Marriner, Derdriu. 13 May 2023. "UAS and LIDAR Apply to Distribution Utility Vegetation Management." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2023/05/uas-and-lidar-apply-to-distribution.html

Marriner, Derdriu. 8 April 2023. "Trees and Construction – The Design Phase Aces Tree Preservation Zones." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2023/04/trees-and-construction-design-phase.html

Marriner, Derdriu. 11 March 2023. "Improved Model Estimates of Tree Debris Following Ice Storms Are Near." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2023/03/improved-model-estimates-of-tree-debris.html

Marriner, Derdriu. 17 February 2023. "Morgan Zabow, Jennifer First and TN Urban Forestry Council Assess UHI." Earth and Space News. Friday.
Available @ https://earth-and-space-news.blogspot.com/2023/02/morgan-zabow-jennifer-first-and-tn.html

Marriner, Derdriu. 17 February 2023. "Chris Graves Aced Winter Tree ID 2 at Tennessee Urban Forestry Council." Earth and Space News. Friday.
Available @ https://earth-and-space-news.blogspot.com/2023/02/chris-graves-aced-winter-tree-id-2-at.html

Marriner, Derdriu. 10 February 2023. "Theodore Eisenman Aired Tree Planting Initiatives as UMass Urban Forestry Today Webinar." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2023/02/theodore-eisenman-aired-tree-planting.html

Marriner, Derdriu. 4 February 2023. "Green and White Variegated Trees Awe Nursery Industry and Tree Biology." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2023/02/green-and-white-variegated-trees-awe.html

Marriner, Derdriu. 3 February 2023. "Chris Graves Aired Winter Tree ID for Tennessee Urban Forestry Council." Earth and Space News. Friday.
Available @ https://earth-and-space-news.blogspot.com/2023/02/chris-graves-aired-winter-tree-id-for.html

Marriner, Derdriu. 28 January 2023. "Kathryn Bronsky Adds Asian Longhorned Beetles to EPA IPM 2023 Webinars." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2023/01/kathryn-bronsky-adds-asian-longhorned.html

Marriner, Derdriu. 14 January 2023. "Jay Dampier Adds Tree Diagnostics as Urban Forestry Today 2023 Webinar." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2023/01/jay-dampier-adds-tree-diagnostics-as_75.html

Marriner, Derdriu. 7 January 2023. "Propiconazole Infusions and Injections Arrest Laurel Wilt in Sassafras." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2023/01/propiconazole-infusions-and-injections.html

Marriner, Derdriu. 31 December 2022. "How Tree Injections Are Administered Affects What They Achieve." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2022/12/how-tree-injections-are-administered.html

Marriner, Derdriu. 27 November 2022. "Climbing Line and Ascent Technique Affect Load Magnitude and Frequency." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2022/11/climbing-line-and-ascent-technique.html

Marriner, Derdriu. 29 October 2022. "Urban Forestry Around the Globe Assesses Private and Public Trees." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2022/10/urban-forestry-around-globe-assesses.html

Marriner, Derdriu. 2 October 2022. "Natural Enemies of Urban Landscape Pests Are Among Beneficial Insects." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2022/10/natural-enemies-of-urban-landscape.html

Marriner, Derdriu. 4 September 2022. "Urban Tree Canopy Placement Affects Summer Household Energy Savings." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2022/09/urban-tree-canopy-placement-affects.html

Marriner, Derdriu. 6 August 2022. "Five Common, Important Decay Fungi Afflict Urban Trees." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2022/08/five-common-important-decay-fungi.html

Marriner, Derdriu. 23 July 2022. "Electrical and Mechanical Failures Arise From Utility Tree Failures." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2022/07/electrical-and-mechanical-failures.html

Marriner, Derdriu. 25 June 2022. "Cabling and Bracing Support Systems Address Tree Defects and Stresses." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2022/06/cabling-and-bracing-support-systems.html

Marriner, Derdriu. 29 May 2022. "Biochar Soil Amendments Advance Soil Quality and Tree Survival." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2022/03/remote-sensing-of-urban-forests-assures.html

Marriner, Derdriu. 9 April 2022. "Rapid Urban Site Index Allows Urban Forest and Tree Soil Assessments." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2022/04/rapid-urban-site-index-allows-urban.html

Marriner, Derdriu. 26 March 2022. "Remote Sensing of Urban Forests Assures Modern Urban Forestry a Future." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2022/03/remote-sensing-of-urban-forests-assures.html

Marriner, Derdriu. 19 February 2022. "Sonic Tomography Adds Internal Defects to Level 3 Tree Risk Assessment." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2022/02/sonic-tomography-adds-internal-defects.html

Marriner, Derdriu. 30 January 2022. "Private Tree Regulations Attempt to Avert Private Tree Canopy Loss." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2022/01/private-tree-regulations-attempt-to.html

Marriner, Derdriu. 9 January 2022. "Best Management Practices Advance Urban Tree Care and Urban Wildlife." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2022/01/best-management-practices-advance-urban.html

Marriner, Derdriu. 26 December 2021. "Integrated Vegetation Management Applies Balanced Control Methods." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2021/12/integrated-vegetation-management.html

Marriner, Derdriu. 27 November 2021. "Leafy, Woody Canopies and Diverse Species Augur Resilient Urban Trees." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2021/11/leafy-woody-canopies-and-diverse.html

Marriner, Derdriu. 30 October 2021. "Careful Selection, Planting and Post-Planting Assist Tree Longevity." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2021/10/careful-selection-planting-and-post.html

Marriner, Derdriu. 25 September 2021. "Energy Gain and Water Use Abet Radial Growth of Irrigated Urban Trees." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2021/09/energy-gain-and-water-use-abet-radial.html

Marriner, Derdriu. 29 August 2021. "Soil Assessments Address Low or Affirm High Quality of Urban Soils." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2021/08/soil-assessments-address-low-or-affirm.html

Marriner, Derdriu. 28 August 2021. "Lindsey Purcell Aired Late Season Pruning Impacts as TreeStuff Webinar." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2021/08/lindsey-purcell-aired-late-season.html

Marriner, Derdriu. 25 July 2021. "Soil, Roots, Leaves, Dormant Buds Affect Stressed Eucalypt Seedlings." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2021/07/soil-roots-leaves-dormant-buds-affect.html

Marriner, Derdriu. 17 July 2021. "Nick Araya of TreeCareLA Addressed Palm Pruning as TreeStuff Webinar." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2021/07/nick-araya-of-treecarela-addressed-palm.html

Marriner, Derdriu. 27 June 2021. "Native Wood-Borers Alarm Ornamental Landscape and Urban Forest Natives." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2021/06/native-wood-borers-alarm-ornamental.html

Marriner, Derdriu. 30 May 2021. "Structural Pruning of Callery Pear Adds Nothing to Branch Union Strength." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2021/05/structural-pruning-adds-no-branch-union.html

Marriner, Derdriu. 25 April 2021. "Stationary Rope Systems (SRS) Annul Friction by Ascents and Redirects." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2021/04/stationary-rope-systems-srs-annul.html

Marriner, Derdriu. 21 March 2021. "Inducing Agents and Synthetic Fungicides Axe Leaf Blotch and Pear Scab." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2021/03/inducing-agents-and-synthetic.html

Marriner, Derdriu. 20 March 2021. "Shem Kendrick Added Modern At-Home Bonsai to TreeStuff Webinar Series." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2021/03/shem-kendrick-added-modern-at-home.html

Marriner, Derdriu. 28 February 2021. "Stationary Rope Systems (SRS) Allow Anchors, Ascent and Work Equipment." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2021/02/stationary-rope-systems-srs-allow.html

Marriner, Derdriu. 31 January 2021. "Street and Park Tree Inventories Since 1902 Assess Trees in Ithaca, NY." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2021/01/street-and-park-tree-inventories-since.html

Marriner, Derdriu. 27 December 2020. "Tree Defect Identification During Tree Inspections Averts Tree Failure." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2020/12/tree-defect-identification-during-tree.html

Marriner, Derdriu. 29 November 2020. "Reduction Pruning Utility Trees Affects CODIT and Epicormic Branches." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2020/11/reduction-pruning-utility-trees-affects.html

Marriner, Derdriu. 31 October 2020. "Arboricultural Operation Safety Standards Avert Adverse Events." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2020/10/arboricultural-operation-safety.html

Marriner, Derdriu. 27 September 2020. "Root-Stem Transition Zones Aim Loading Forces Through Roots and Soils." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2020/09/root-stem-transition-zones-aim-loading.html

Marriner, Derdriu. 30 August 2020. "Arboricultural Operation Safety Standards Are Country-Specific." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2020/08/arboricultural-operation-safety.html

Marriner, Derdriu. 26 July 2020. "Sensitivity Analyses Admit Ecosystem Disservice and Ecosystem Service." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2020/07/sensitivity-analyses-admit-ecosystem.html

Marriner, Derdriu. 28 June 2020. "Lignotubers Assure Arboricultural Management of Lignotuberous Shoots." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2020/06/lignotubers-assure-arboricultural.html

Marriner, Derdriu. 31 May 2020. "Included Bark Ages Safely With Fused, Entwining Natural Braces ." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2020/05/included-bark-ages-safely-with-fused.html

Marriner, Derdriu. 16 May 2020. "Trent Dicks Alerted TreeStuff Webinar Attendees to Spotted Lanternfly." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2020/05/trent-dicks-alerted-treestuff-webinar.html

Marriner, Derdriu. 26 April 2020. "Canker Identification and Canker Management Apply to Landscape Trees." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2020/04/canker-identification-and-canker.html

Marriner, Derdriu. 29 March 2020. "Arboricultural Operation Safety Training Averts Hazardous Incidents." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2020/03/arboricultural-operation-safety.html

Marriner, Derdriu. 29 February 2020. "Boundary-Spanning Collective Action Assuages Wildfire Risk in the West." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2020/02/boundary-spanning-collective-action.html

Marriner, Derdriu. 23 February 2020. "Biochar Applications Are Best With Compost and Fertilizer Applications." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2020/02/biochar-applications-are-best-with.html

Marriner, Derdriu. 26 January 2020. "Fungicide Injections Affect Dutch Elm Disease and Internal Decay." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2020/01/fungicide-injections-affect-dutch-elm.html

Marriner, Derdriu. 29 December 2019. "Pruning Cuts Applied Ably, Appropriately Are Best Management Practices." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2019/12/pruning-cuts-applied-ably-appropriately.html

Marriner, Derdriu. 30 November 2019. "Structural Growing Media and Supported Pavement Affect Tree Responses." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2019/11/structural-growing-media-and-supported.html

Marriner, Derdriu. 27 October 2019. "Tree Pruning Systems Answer to Best Management Practices." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2019/10/tree-pruning-systems-answer-to-best.html

Marriner, Derdriu. 22 September 2019. "Southeastern Street Tree Arthropod Pests Are Online Survey Subjects." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2019/09/southeastern-street-tree-arthropod.html

Marriner, Derdriu. 25 August 2019. "Cost Approach Approximates Plant Repair, Replacement or Restoration." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2019/08/cost-approach-approximates-plant-repair.html

Marriner, Derdriu. 28 July 2019. "Indirect Watering Devices Are There for Newly Transplanted Urban Trees." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2019/07/indirect-watering-devices-are-there-for.html

Marriner, Derdriu. 30 June 2019. "Plant Appraisal Data Collection Allies Off-Site and On-Site Research." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2019/06/plant-appraisal-data-collection-allies.html

Marriner, Derdriu. 26 May 2019. "Wire Basket Removal or Wire Basket Retention: Girdling or Stable Roots." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2019/05/wire-basket-removal-or-wire-basket.html

Marriner, Derdriu. 28 April 2019. "Woody Plant Appraisal Data Collection for Shrubs, Trees and Vines." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2019/04/woody-plant-appraisal-data-collection.html

Marriner, Derdriu. 30 March 2019. "Balancing Roadside Tree Benefits and Risk of Streetscape Tree Crashes." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2019/03/balancing-roadside-tree-benefits-and.html

Marriner, Derdriu. 17 February 2019. “Plant Appraisal Estimate, Scope, Data, Analysis, Reconciliation, Report.” Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2019/02/plant-appraisal-estimate-scope-data.html

Marriner, Derdriu. 27 January 2019. “Urban Tree Vulnerability in Residential Toronto, Ontario, Canada.” Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2019/01/urban-tree-vulnerability-in-residential.html

Marriner, Derdriu. 30 December 2018. "Plant Appraisal: Cost and Value Estimates and Economic Principles." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2018/12/plant-appraisal-cost-and-value.html

Marriner, Derdriu. 23 December 2018. "Six-Year Forest Health Ambassador Program of Oakville, Ontario, Canada." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2018/12/six-year-forest-health-ambassador.html

Marriner, Derdriu. 21 October 2018. "Nursery Production Systems: Tough Urban Landscape Trees on Rough Sites." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2018/10/nursery-production-systems-tough-urban.html

Marriner, Derdriu. 16 September 2018. "Induced-Resistance Agents, Silicon Fertilizers, Synthetic Fungicides." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2018/09/induced-resistance-agents-silicon.html

Marriner, Derdriu. 26 August 2018. "Nursery Production Systems for Successful Urban Tree Plantings." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2018/08/nursery-production-systems-for.html

Marriner, Derdriu. 29 July 2018. "Tree Roots Branch in Fabric Containers But Circle and Girdle Plastic." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2018/07/tree-roots-branch-in-fabric-containers.html

Marriner, Derdriu. 30 June 2018. "Wood Decay Fungi Management of Terminal Urban Pathogens." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2018/06/wood-decay-fungi-management-of-terminal.html

Marriner, Derdriu. 27 May 2018. "Downtown Commercial Streetscape Tree Populations in Toronto, Canada." Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2018/05/downtown-commercial-streetscape-tree.html

Marriner, Derdriu. 28 April 2018. “Mushroom-Forming and Non-Mushroom-Forming Fungal Life Cycle Traits.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2018/04/mushroom-forming-and-non-mushroom.html

Marriner, Derdriu. 17 March 2018. “Emerald Ash Borer Rapid Response Community Preparedness Project.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2018/03/emerald-ash-borer-rapid-response.html

Marriner, Derdriu. 17 February 2018. “Tree Retention by Arborists for Wildlife Habitat Friendly Tree Care.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2018/02/tree-retention-by-arborists-for.html

Marriner, Derdriu. 14 January 2018. “Integrated Vegetation Management Study in North and South Yukon, Canada.” Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2018/01/integrated-vegetation-management-study.html

Marriner, Derdriu. 9 December 2017. “Tree Inventories: Preemptive and Proactive or Piecemeal and Reactive.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2017/12/tree-inventories-preemptive-and.html

Marriner, Derdriu. 25 November 2017. “Chlorantraniliprole Reduced-Risk Insecticides Get Leaf-Eaters Not Bees.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2017/11/chlorantraniliprole-reduced-risk.html

Marriner, Derdriu. 28 October 2017. “Palm Plant Health Care: Abiotic, Biotic Stress Culture and Management.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2017/10/palm-plant-health-care-abiotic-biotic.html

Marriner, Derdriu. 16 September 2017. “Predawn Leaf Water Potentials Indicate Crown Dieback and Water Status.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2017/09/predawn-leaf-water-potentials-indicate.html

Marriner, Derdriu. 19 August 2017. “Palm Tree Identification and Pruning of Native and Naturalizable Palms.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2017/08/palm-tree-identification-and-pruning-of.html

Marriner, Derdriu. 22 July 2017. “Commonly Planted, Potentially Phytoremediating Street Tree Species.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2017/07/commonly-planted-potentially.html

Marriner, Derdriu. 17 June 2017. “Root Loss From Root Pruning and Root Shaving of Stem-Girdling Roots.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2017/06/root-loss-from-root-pruning-and-root.html

Marriner, Derdriu. 27 May 2017. “Age and Canopy Area Cost Less and Tell More in Urban Tree Inventories.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2017/05/age-and-canopy-area-cost-less-and-tell.html

Marriner, Derdriu. 22 April 2017. “Urban Root Management: Big Infrastructure, Small Space, Stressed Roots.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2017/04/urban-root-management-big.html

Marriner, Derdriu. 12 March 2017. “Flexural Elasticity Modulus: Trees and Watersprouts Bend or Break.” Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2017/03/flexural-elasticity-modulus-trees-and.html

Marriner, Derdriu. 18 February 2017. “Plant Health Care Diagnostics When Plants and Places Wrong One Another.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2017/02/plant-health-care-diagnostics-when.html

Marriner, Derdriu. 14 January 2017. “Tree Fertilization for Fine Root Growth and Whole Root System Effects.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2017/01/tree-fertilization-for-fine-root-growth.html

Marriner, Derdriu. 17 December 2016. “Abiotic and Biotic Stress in Low Maintenance Tree Health Care Programs.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2016/12/abiotic-and-biotic-stress-in-low.html

Marriner, Derdriu. 19 November 2016. “Organic Amendments to Compacted Degraded Urban Highway Roadsides.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2016/11/organic-amendments-to-compacted.html

Marriner, Derdriu. 15 October 2016. “Tree Protection Zones by Arborists for All Construction Project Phases.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2016/10/tree-protection-zones-by-arborists-for.html

Marriner, Derdriu. 17 September 2016. “Stormwater Runoff Landscaping With Urban Canopy Cover and Groundcover.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2016/09/stormwater-runoff-landscaping-with.html

Marriner, Derdriu. 13 August 2016. “Changing Places: Tree Nutrient Movement Down, Tree Water Movement Up.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2016/08/changing-places-tree-nutrient-movement.html

Marriner, Derdriu. 16 July 2016. “Treated or Untreated Oriental Bittersweet Vine Management Cut-Stumping.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2016/07/treated-or-untreated-oriental.html

Marriner, Derdriu. 18 June 2016. “Tree Injection Site Procedures: Manufacturer's Instructions and Labels.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2016/06/tree-injection-site-procedures.html

Marriner, Derdriu. 22 May 2016. “Electrical Utility Area Temperate Urban Street Trees: Pruned Regrowth.” Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2016/05/electrical-utility-area-temperate-urban.html

Marriner, Derdriu. 16 April 2016. “Tree Injection Methods: Treatment Option in Integrated Pest Management.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2016/04/tree-injection-methods-treatment-option.html

Marriner, Derdriu. 6 March 2016. “Bare-Rooted Ornamental Urban Transplants: Amendments Against Mortality.” Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2016/03/bare-rooted-ornamental-urban.html

Marriner, Derdriu. 28 February 2016. “Bark Protective Survival Mechanisms Foil Deprivation, Injury, Invasion.” Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2016/02/bark-protective-survival-mechanisms.html

Marriner, Derdriu. 23 January 2016. "LITA Model: Linear Index of Tree Appraisal of Large Urban Swedish Trees." Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2016/01/lita-model-linear-index-of-tree.html

Marriner, Derdriu. 19 December 2015. “Tree Lightning Protection Systems: Site, Soil, Species True Designs.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2015/12/tree-lightning-protection-systems-site.html

Marriner, Derdriu. 24 October 2015. “Tree Lightning Protection Systems Tailored to Sites, Soils, Species.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2015/10/tree-lightning-protection-systems.html

Marriner, Derdriu. 15 August 2015. “Tree Friendly Urban Soil Management: Amend, Fertilize, Mulch, Till!” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2015/08/tree-friendly-urban-soil-management.html

Marriner, Derdriu. 13 June 2015. “Tree Friendly Urban Soil Management: Assemble, Assess, Assist, Astound.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2015/06/tree-friendly-urban-soil-management.html

Marriner, Derdriu. 18 April 2015. “Tree Wound Responses: Healthy Wound Closures by Callus and Woundwood.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2015/04/tree-wound-responses-healthy-wound.html

Marriner, Derdriu. 15 February 2015. “Urban Forest Maintenance and Non-Maintenance Costs and Benefits.” Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2015/02/urban-forest-maintenance-and-non.html

Marriner, Derdriu. 13 December 2014. “Tree Dwelling Symbionts: Dodder, Lichen, Mistletoe, Moss and Woe-Vine.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2014/12/tree-dwelling-symbionts-dodder-lichen.html

Marriner, Derdriu. 18 October 2014. “Tree Cable Installation Systems Lessen Target Impact From Tree Failure.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2014/10/tree-cable-installation-systems-lessen.html

Marriner, Derdriu. 16 August 2014. “Flood Tolerant Trees in Worst-Case Floodplain and Urbanized Scenarios.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2014/08/flood-tolerant-trees-in-worst-case.html

Marriner, Derdriu. 14 June 2014. “Integrated Vegetation Management of Plants in Utility Rights-of-Way.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2014/06/integrated-vegetation-management-of.html

Marriner, Derdriu. 12 April 2014. “Tree Twig Identification: Buds, Bundle Scars, Leaf Drops, Leaf Scars.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2014/04/tree-twig-identification-buds-bundle.html

Marriner, Derdriu. 15 February 2014. “Tree Twig Anatomy: Ecosystem Stress, Growth Rates, Winter Identification.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2014/02/tree-twig-anatomy-ecosystem-stress.html

Marriner, Derdriu. 14 December 2013. “Community and Tree Safety Awareness During Line- and Road-Clearances.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2013/12/community-and-tree-safety-awareness.html

Marriner, Derdriu. 13 October 2013. “Chain-Saw Gear and Tree Work Related Personal Protective Equipment.” Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2013/10/chain-saw-gear-and-tree-work-related.html

Marriner, Derdriu. 12 October 2013. “Storm Damaged Tree Clearances: Matched Teamwork of People to Equipment.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2013/10/storm-damaged-tree-clearances-matched.html

Marriner, Derdriu. 17 August 2013. “Storm Induced Tree Damage Assessments: Pre-Storm Planned Preparedness.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2013/08/storm-induced-tree-damage-assessments.html

Marriner, Derdriu. 15 June 2013. “Storm Induced Tree Failures From Heavy Tree Weights and Weather Loads.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2013/06/storm-induced-tree-failures-from-heavy.html

Marriner, Derdriu. 13 April 2013. “Urban Tree Root Management Concerns: Defects, Digs, Dirt, Disturbance.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2013/04/urban-tree-root-management-concerns.html

Marriner, Derdriu. 16 February 2013. “Tree Friendly Beneficial Soil Microbes: Inoculations and Occurrences.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2013/02/tree-friendly-beneficial-soil-microbes.html

Marriner, Derdriu. 15 December 2012. “Healthy Urban Tree Root Crown Balances: Soil Properties, Soil Volumes.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2012/12/healthy-urban-tree-root-crown-balances.html

Marriner, Derdriu. 13 October 2012. “Tree Adaptive Growth: Tree Risk Assessment of Tree Failure, Tree Strength.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2012/10/tree-adaptive-growth-tree-risk.html

Marriner, Derdriu. 11 August 2012. “Tree Risk Assessment Mitigation Reports: Tree Removal, Tree Retention?” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2012/08/tree-risk-assessment-mitigation-reports.html

Marriner, Derdriu. 16 June 2012. “Internally Stressed, Response Growing, Wind Loaded Tree Strength.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2012/06/internally-stressed-response-growing.html

Marriner, Derdriu. 14 April 2012. “Three Tree Risk Assessment Levels: Limited Visual, Basic and Advanced.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2012/04/three-tree-risk-assessment-levels.html

Marriner, Derdriu. 19 February 2012. “Qualitative Tree Risk Assessment: Risk Ratings for Targets and Trees.” Earth and Space News. Sunday.
Available @ https://earth-and-space-news.blogspot.com/2012/02/qualitative-tree-risk-assessment-risk.html

Marriner, Derdriu. 18 February 2012. “Qualitative Tree Risk Assessment: Falling Trees Impacting Targets.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2012/02/qualitative-tree-risk-assessment.html

Marriner, Derdriu. 10 December 2011. “Tree Risk Assessment: Tree Failures From Defects and From Wind Loads.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2011/12/tree-risk-assessment-tree-failures-from.html

Marriner, Derdriu. 15 October 2011. “Five Tree Felling Plan Steps for Successful Removals and Worker Safety.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2011/10/five-tree-felling-plan-steps-for.html

Marriner, Derdriu. 13 August 2011. “Natives and Non-Natives as Successfully Urbanized Plant Species.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2011/08/natives-and-non-natives-as-successfully.html

Marriner, Derdriu. 11 June 2011. “Tree Ring Patterns for Ecosystem Ages, Dates, Health and Stress.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2011/06/tree-ring-patterns-for-ecosystem-ages.html

Marriner, Derdriu. 9 April 2011. “Benignly Ugly Tree Disorders: Oak Galls, Powdery Mildew, Sooty Mold, Tar Spot.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2011/04/benignly-ugly-tree-disorders-oak-galls.html

Marriner, Derdriu. 12 February 2011. “Tree Load Can Turn Tree Health Into Tree Failure or Tree Fatigue.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2011/02/tree-load-can-turn-tree-health-into.html

Marriner, Derdriu. 22 December 2010. “Tree Electrical Safety Knowledge, Precautions, Risks and Standards.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2010/12/tree-electrical-safety-knowledge.html

efficacy of aphidoletes predatory releases to mitigate aphid populations on linden street trees BB, HH, Thomas Whitney PhD davey tree expert company technical advisor 700 800 900 attendees Jul 21, 2026 12:00 PM Central Time (US and Canada) 848 9203 5342 Releasing augmentative biocontrol agents to manage insect pests of plants has been successful in certain agriculture and greenhouse systems, but this IPM strategy has been virtually unexplored in an urban forest and landscape tree context. For three years we released a common greenhouse predator, the aphid midge (Aphidoletes aphidimyza), on individual linden (Tilia spp.) trees along the boulevards of Portland, Oregon, USA, and measured linden aphid (Eucallipterus tiliae) densities during the growing season. In the first year, aphid densities on control trees were 3.5 times that of release trees by mid-July, suggesting the midges helped to flatten the exponential growth curve. Results were mixed in the other two years of the study, due to a combination of much lower overall aphid densities (lack of food for predators) and possible release timing miscues. This biocontrol agent appears to hold promise as an aphid management tool on pollinator-attractive trees where chemical applications are not practical, and future research may consider examining serial releases in spring to overcome timing challenges 2025 Robert Felix Memorial Scholarship Recipient Clayton Mahoney one of 9 $5000 6 yr army aircraft maintenance graduate december isa certification january city of houston urban forestry technician while georgia student abraham baldwin agricultural college, tifton ga christopher rivera garcia 6/2/2003 phoenix arizona 1//3/26 merida yucatan mexicosurgical complication after did 75 percent research URBAN tree pest management FUNDAMENTALS of IPM set action thresholds, identification and monitoring, prevention, control CHALLENGES for arborists to enact IPM little input on preventative practices, unrealistic client expectations instant results zero pest tolerance curative treatments preferred so reactive, timing constraints microclimatic variation scheduling logistics on-site monitoring not feasible WHAT does this incentivize "inspect and treats" so spray and pray; broad-spectrum chemicals; longer residual chemicals so not targeted aooriach INTEGRATED pest management tactics intervention prevention, increasing, toxicity insecticides fungicides herbicides miticides; soaps oils baking soda repellants microbials igrs; predators parasites nematodes; prune weeding mulch traps barriers flaming; site and plant selection sanitation rotations triangle conventional pesticides biorational pesticides chemical, biological, physical mechanical, cultural AUGMENTATIVE biocontrol supplemental release of natural enemies, types inundation released organisms expected to provide control usually released in large numbers expect short-term knockdown of pests eg biopesticides entomopathogenic nematodes inoculation offspring expected to provide control usually released in small numbers expect longterm control but not permanent eg encarsia formosa on whiteflies AUGMENTATIVE BIOCONTROL aphids pests lindens tulip trees birches honeydew sooty mold reduced vigor candidate biocontrol aphidoletes aphidimyza gall midge diptera cecidomyiidae among top 10 used biocontrol agents mostly used in greenhouses outdoor crop successes cucumber eggplant rose sweet pepper hops native to north america wide commercial availability native to whole nearctic effective natural enemies females detect honeydew cheicl volatiles one larva consumers 110-30 aphids during development polyphagous lack significant aphid species preferences aphid density and honeydew are better predictors of female oviposition not distracted by other prey most important 5th limited dispersal andor high site fidelity unlike lady beetle and lacewing strongflying female dispersal limit 45 meters COULD this predator be viable for aphid control objective determine if early season release of a reduces aphid densities on single urban landscape trees steps monitor for aphids early season release predator when aphids first appear sub objectives assess whether yearoveryear control and differences in product stylesinsectaries METHODS portland street trees selection of lindens tilia sp each year release on half of trees other half control 62 trees some cut down 100 meter separation between trees METHODS experimental design hanging vial by applied bio-nomics 250 freshly captured pupae 125 each from two generations passive release year 3 product comparison blister pack bioline bulk pupae in release box tiptop biocontrol aphid counts four random branches per tree eucallipterus tiliae most abundant in lower canopy most infested leaf per shoot method four random branches per tree eucallipterus tiliae most abundant in lower canopy 8 counts per year RESULTS aphids 2023 aphids counted per tree 0 10 20 30vs date release may 31 jun jul aug sep control release 3 weeks to emerge 1st generation not many until july end expanded to 2024 and 2025 multiple years of research 2024 nothing more than 10 per tree vs release about same half release now control half control now release 17 release release 16 release control 16 control release 16 control control 2025 jul almost 30 1st with 3 products so late jun release numerical reduction but not statistically significant july release perhaps because of late release 2025 open box fewer aphids below 10 but blister vial control 15 to 25 TEMPORAL density dependent mortality? mean aphids per tree per date more mortality in release trees parasitoid mummies honeydew ants on tree some honeydew, ants dont protect aphids mostly sugar ants for honeydew, mummies more ono control DISCUSSION can early season release of aphidoletes reduce aphid densities on single urban landscape trees potentially yes in high aphid years with welltimed release FUTURE work review climatic data growing degree days base 10 degrees c 5/31/23 349 5/30/24 338 6/5/25 424 review climatic work assess effect of relative nonporous surface area under canopy any correlation with aphid control? test serial spring releases 2026 may jun jul aug monitor count aphids aphidoletes release survey natural enemy community 2026 lady beetles? lacewings? parasitoid mummies? earwigs? cost-competitive alternative? insecticidal soap for 25 ft tree about $17 vial of 250 aphidoletes $20 vancouver votes to ban beekilling neonicotinoid pesticides USE in the field 6plus offices in canada dan sharp former victoria dm ive had great results both with releases on single trees and alternating releases on groups of similar trees They can knock down a heavy infestation within a few weeks using a single release, saving the client the cost and bother ofm ultiple pesticide applications ACKNOWLEDGMENTS dr ad ali TREE fund chris garcia QUESTIONS 1 more infestations in monoculture plantings in street plantings? chose single lindens in block and gis tool away 100 feet next lines of lindens quicker infested Q2 hardiness zone? hardy to degree pupate in soil so overwinter in cold then emerge with soil temperature rise but hardiness right above freezing Q3 other companies using aphido used in victoria legal not regulated because not pesticide not aphid control in all situations because of aphid density and timing critical Q4 predator reapply or last more than one year? greenhouse controlled so up to 5 year control backyard mulched nonchemical residual control but probably annually and serial releases Q5 weather modifications hot cool summer impact? not yet

Aphid Midges Are in a 3-Year Study by Dr Thomas Whitney for TREE Fund

Summary: Aphid midges are in a 3-year study 2023-2025 by Dr Thomas Whitney for TREE Fund funding and July 21, 2026 webinar with Drs Beau Brodbeck and Heath Hupke.

Aphid midges are in a 3-year study 2023-2025 by Dr Thomas Whitney for TREE Fund funding and July 21, 2026 webinar with Drs Beau Brodbeck and Heath Hupke and ISA-Certified Arborist Mahoney.

The Davey Tree Expert Company Technical Advisor Whitney bared at 1:00-2:00 p.m. Eastern Daylight Time how aphid midges battle linden-tree (Tillia spp) aphids in Portland, Oregon. Aphid midges, classified Aphidoletes aphidimyza ("aphid-doer aphid-gnat/-midge"; Greek λέτες λέτες, λέτες μύζα) 1847 by Camillo Rondoni (Mon., Nov. 21, 1808-Wed., Sep. 17, 1879), consume 80-plus species. They defeat such daunting aphid species as green-peach aphids (Myzus persicae ["gnat walnut"; Greek μύζα, Latin persicæ) by devouring body-interior contents through an aphid thorax-damaging hole.

The adult stage entails black, delicate, fungus gnat-like, 1/8-inch (32-millimeter) aphid midges, over 10 days and nights, daily emerging from leafy undersides for nightly aphid honeydew-eating.

Adult aphid-midge females find aphid colonies even as they each figure there 100 to 250 1/64-inch (0.40-millimeter) orange, shiny eggs furnished singly or in small groups.

Aphid-midge eggs guard hatching times of 2 to 3 days even as such hatchlings, as bright-orange, slight, small larvae, go groundward only as 3- to 7-day-olds. Three-quarter- (3/4-) to 1.5-inch- (1.9- to 3.8-centimeter-) deep holes that 3- to 7-day-old larvae hone into pupating, underground-home burrows host them into the adult stage. Adult-midge larvae inject a paralysis-initiating toxin into aphid-prey leg joints even as they ingest aphid-body interiors by afore-indicated bite holes in aphid-prey thoraxes (""neck-abdomen/heart-lungs-cavity"; Greek θώρᾱξ).

Dr Thomas Whitney; Drs Beau Brodbeck, Heath Hupke; ISA-Certified Arborist Clayton Mahoney judge aphid midges in the TREE Fund webinar Efficacy of Aphidoletes aphidimyza Predator Releases.

One maximally 1/8-inch- (0.32-centimeter-) long larva kills 4 to 65 larger-sized aphids daily even as high-population aphids kindle larvae killing more than they know to eat.

Aphid midges lead their most effective life-expectant lifespans at 68 to 80 degrees Fahrenheit (20 to 27 degrees Celsius) and at higher levels of relative humidity. Such moist milieus as vermiculite- or peat moss-substrated bottles and trays move aphid midges as commercial insectary-grown pupae into commercial-crop greenhouses as biological pest-controlling, egg-laying adults. The 3-year study from year 2023 through year 2025 notes how aphid midges negotiate a monocultural, open-air, urban-forest niche even as natural enemies perhaps navigate there.

TREE Fund webinar Efficacy of Aphidoletes aphidimyza Predataor Releases occasions Dr Thomas Whitney; Drs Beau Brodbeck, Heath Hupke; ISA-Certified Arborist Clayton Mahoney observing urban-forest aphid midges.

Animalia ("living-creature"; Latin animal) kingdom-ship and Anthropoda ("jointed-foot"; Greek ἄρθρον πούς) phylum-ship respectively produce muscle cell-contracting, organic material-preying, oxygen-breathing and prompt exoskeletonized, jointed-appendaged, segmented-bodied aphid midges.

Pancrustacea ("all-shell-having"; Greek πᾰν-, Latin crusta -ācea) clade-ship versus jointed-legged, paired-antennae Insecta ("cut-/divided-/notched-body"; īnsectus) class-ship queue quadripartite-coned compound-eye ommatidium (ὀμματίδιον ["eye-little"; ὀμμα ίδιον) versus head-thorax-abdomen segmentation. Diptera ("two-wings"; Greek δίπτερα πτερόν) order-ship versus hairy-winged, long-antennaed Cecidomyiidae ("gallfly-appearing/-resembling"; Greek κηκίς μυῖα -ίδης/-ειδής, Latin -idæ) family-ship respectively realize single-paired wings and abnormal-growing plant tissue. The Aphidoletes genus, specied abietis, aphidimyza, spatulatus, thompsoni, urticariae, sustains aphid-midge larvae seeking field crop-, fruit tree-, ornamental crop-, vegetable crop-, vine-sheltering, vine-sojourning aphids and mites.

TREE Fund webinar Efficacy of Aphidoletes aphidimyza Predataor Releases transmits Dr Thomas Whitney; Drs Beau Brodbeck, Heath Hupke; ISA-Certified Arborist Clayton Mahoney testing urban-forest aphid midges.

Acknowledgment

My special thanks to talented artists and photographers/concerned organizations who make their fine images available on the internet.

Image credits:

IMAGE 1

IMAGE 2

For further information:

Gilman, Ed. 2011. An Illustrated Guide to Pruning. Third Edition. Boston MA: Cengage.

Hayes, Ed. 2001. Evaluating Tree Defects. Revised, Special Edition. Rochester MN: Safe Trees.