Summary: Shawn Bernick and E. Thomas Smiley of Bartlett Tree Research Laboratories indicate when Integrated Pest Management needs to include tree injection methods.
|
Imidacloprid insecticide injections with original Mauget capsules; tree injection method for treating Asian long-horned beetle (Anoplophora glabripennis) infestation, Ravenswood neighborhood, northern Chicago, southeastern Illinois, May 2002: Dennis Haugen/USDA Forest Service, CC BY 3.0 United States, via Forestry Images |
Integrated Pest Management accepts tree injection methods when soil treatments or sprays are ineffective or pest damages major, according to Tree Injection (Part 1) for the April 2016 issue of Arborist News.
Shawn Bernick and E. Thomas Smiley of Bartlett Tree Research Laboratories also broach cost-ineffective and jurisdiction-restricted spraying, tree sizes near water bodies and vascular wilt diseases. Sap flow carries the two low- or no-pressure tree injection methods of dry pill, powder or tablet implants dissolved from drilled holes and of infusion injections. Macroinjection types of pressurized tree injection methods deliver, and sometimes distribute unevenly to the crown's detriment, diluted, high-volume, low-concentrate solutions from common reservoirs to multiple ports. Microinjectors with handheld guns, with macroinjection-like compressed-gas canisters, with macroinjection-styled pumps, with pre-measured capsules or with self-pressurizing capsules eject low-phytotoxic, low-volume, non-diluted solutions through injection ports.
All four tree injection methods favor shallow, small-diameter holes that fill in naturally, not with caulk or dowel backfill, and furnish lowest likelihoods of introducing decay.
Genetics and health give higher species-specific tolerances of drill and injection wounds whose external closure gets to be the "only observable indication" of internal xylem damage. Circles around, fluxes oozing from and "lines of dead bark above and possibly below" injection sites respectively hint at phytotoxic damage to cambium, wood and phloem. Defoliation, interveinal necrosis and marginal leaf scorch within seven days of treatments indicate phytotoxicity whose damage is minor if absent from foliage's "next flush of growth."
Manufacturers judge Integrated Pest Management products non-phytotoxic according to tests and to treatments per label instructions since active ingredients juggle application-specific drench, injection and spray formulations.
Applicators know that "relatively rapid" treatments and uptakes for "evenly distributed" solutions to "target tissues" keep tree injection methods "effective and affordable" Integrated Pest Management options.
Such factors as environmental conditions, injection device, product viscosity, required dosage, tree health and tree species lengthen or shorten the "time required to perform" injection treatments. Injection site numbers, placements and treatment times must manage an even product distribution even though solutions typically move upward and water moves along species-specific, variable pathways. The "relatively large vessels" in such ring-porous hardwood trees as ash and oak necessitate far faster uptakes than such diffuse-porous hardwoods as maple and pear need.
Uptake rates operate more slowly in conifers because of resin flows and because of small-diameter tracheids and in deciduous trees "after the onset of fall coloration."
The timing of environmental factors, pest activity, residual activity, seasonal growth and treatment schedules push all four tree injection methods toward treatment failure or treatment success.
Morning applications when humidity is low and when concentrations are high, pests susceptible, skies clear, soils moist, temperatures moderate, trees leafed-out and winds light quicken uptakes. Injections of trees in decline or with "compromised vascular systems," drought or heat stress or "serious dieback" and iron injections other than in autumn remain ineffective. The timing optimally shows extended intervals between treatment dates by scheduling products with longer anticipated times, called residual activity, for solutions to stay active inside trees.
Pests take many forms that Integrated Pest Management tackles through tree injection methods by timing treatments to best site, tree and weather configurations and worst outbreaks.
|
Postdoctoral scientist Francisco Posada injects spore suspension into stem of coffee seedling; the fungal injection attacks a wide range of pests, including the coffee berry borer (Hypothenemus hampei): Peggy Greg/USDA Forest Service, CC BY 3.0 United States, via Forestry Images |
Acknowledgment
My special thanks to:
talented artists and photographers/concerned organizations who make their fine images available on the internet;
University of Illinois at Urbana-Champaign for superior on-campus and on-line resources.
Image credits:
Imidacloprid insecticide injections with original Mauget capsules; tree injection method for treating Asian long-horned beetle (Anoplophora glabripennis) infestation, Ravenswood neighborhood, northern Chicago, southeastern Illinois, May 2002: Dennis Haugen/USDA Forest Service, CC BY 3.0 United States, via Forestry Images @ http://www.forestryimages.org/browse/detail.cfm?imgnum=1393016
Postdoctoral scientist Francisco Posada injects spore suspension into stem of coffee seedling; the fungal injection attacks a wide range of pests, including the coffee berry borer (Hypothenemus hampei): Peggy Greg/USDA Forest Service, CC BY 3.0 United States, via Forestry Images @ http://www.forestryimages.org/browse/detail.cfm?imgnum=1355050
For further information:
Bernick, Shawn; and Smiley, E. Thomas. April 2016. "Tree Injection (Part 1)." Arborist News 25(2): 12-17.
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. 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. 11 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