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Treatment Options for Emerald Ash Borer

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.

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Treatment Options for Emerald Ash Borer

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  1. Treatment Options for Emerald Ash Borer Dr. Mark Shour

  2. 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

  3. Other control considerations… • Identify the target tree as ash • Set sentiment aside, then: • Judge health of tree • Assess landscape value • Determine cost/treatment X several years • Insecticide use for life of tree (yearly for most products)

  4. Other control considerations… • Preventive treatments most effective • curative application may work if less than 30% canopy dieback • dead branches should be removed

  5. Other control considerations… • Preventive treatments are suggested when confirmed EAB is 15 miles away; treatments outside this risk zone are not recommended

  6. 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

  7. 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.

  8. For larger trees… • Treatment by commercial applicator • Soil injection • Basal trunk spray • Trunk injection

  9. 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

  10. 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

  11. Canopy sprays not recommended • Limited effectiveness • Need for special equipment • Spray drift likely • Possible adverse effects to nontargets

  12. Commercial application techniques Soil injection from larger tank

  13. Commercial applicationtechniques Mauget trunk injection Kioritz soil injection

  14. Commercial application techniques Arborjet system Wedgle method

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