Treatment Options for Emerald Ash Borer
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Transcript of Treatment Options for Emerald Ash Borer
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Treatment Options for Emerald Ash Borer
Dr. Mark Dr. Mark ShourShour
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New Publication: PM 2084
• Recommended insecticides work best as preventive treatments for healthy ash trees planted along streets or in yard settings
• Treatment is not practical or cost effective for woodlot trees
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Other control considerations…
1. Identify the target tree as ash2. Set sentiment aside, then:
a. Judge health of treeb. Assess landscape valuec. Determine cost/treatment X several
years
3. Insecticide use every year for life of tree
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Other control considerations…
4. Preventive treatments most effective
• curative application may work if less than 40% canopy dieback
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Other control considerations…
5. Preventive treatments are suggested when confirmed EAB is 15 miles away; treatments outside this risk zone are not recommended
6. Ash trees in an eradication area are subject to removal by regulators even if preventive treatments were made
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EAB chemical control
• Systemic insecticides require time and active tree growth prior to adult EAB activity:– Soil treatments 4-8 weeks– trunk injections 2-4 weeks
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Homeowner EAB control
• Imidacloprid 1.47%• Up to 25” circumference/8” diameter
tree• Pull back mulch 12” from base of tree• Soil drench / ‘bucket method’ on
tree’s root flare• Early to mid-April every year
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For trees larger than 8” diameter
• Treatment by commercial applicator
• Soil injection w/ imidacloprid• Trunk spray w/ dinotefuran• Trunk injection w/ imidacloprid,
bidrin, or emamectin benzoate
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What is Tree-age?
• Active ingredient emamectin benzoate• Special local needs labels initially in EAB
infested areas; new national label expected
• Only EAB treatment effective for more than one year (up to 3 years?)
• Must be injected into tree via ¼ inch drilled holes; potential for injury to the tree
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Canopy sprays not recommended
• Limited effectiveness• Need for special equipment• Spray drift likely• Possible adverse effects to
nontargets
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Commercial application techniques
Soil injection from larger tank
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Commercial applicationtechniques
Mauget trunk injection Kioritz soil injection
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Commercial application techniques
Arborjet system Wedgle method