treatment options for emerald ash borer
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Treatment Options for Emerald Ash Borer. Dr. Mark Shour. PM 2084 Revised 2013. 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. - PowerPoint PPT PresentationTRANSCRIPT
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Treatment Options for Emerald Ash Borer
Dr. Mark Shour
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PM 2084 Revised 2013
• 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
years3. Insecticide use for life of tree (yearly
for most products)
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Other control considerations…
4. Preventive treatments most effective
• curative application may work if less than 30% canopy dieback
• dead branches should be removed
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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
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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• Soil drench treatment on tree’s root
flare: trees up to 60” circumference/20” diameter. Pull back mulch 12” from base of tree. Apply spring every year.
• Granular treatment: trees up to 36” circumference/12” diameter. Apply within 18” of trunk. Irrigate when done. Apply spring every year.
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For larger trees…• Treatment by commercial
applicator–Soil injection–Basal trunk spray–Trunk injection
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Per Acre Use Limitations
• Professional and some homeowner products have per acre use limitations for soil or basal trunk applications
• Carefully read the product label
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What is Tree-Age?• Active ingredient emamectin
benzoate• Only EAB treatment effective for
more than one year • Must be injected into tree via ¼
inch drilled holes by a certified applicator
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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