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EAB Distribution

EAB Distribution. EAB Distribution. EAB Distribution. EAB Distribution. Nodine – est. 6-7 years old at discovery. 5-10% of ash in area were dead Most of rest had noticeable decline. Nodine – est. 6-7 years old at discovery. > 100 larval galleries / square meter of bark

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EAB Distribution

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  1. EAB Distribution

  2. EAB Distribution

  3. EAB Distribution

  4. EAB Distribution

  5. Nodine – est. 6-7 years old at discovery • 5-10% of ash in area were dead • Most of rest had noticeable decline

  6. Nodine – est. 6-7 years old at discovery • > 100 larval galleries / square meter of bark • Lots of woodpecking

  7. Fort Snelling G.C. - est. 4-5 years old at discovery • A few trees in area were dead • ~20% had noticeable canopy decline • EAB trees masked by native borer activity

  8. Fort Snelling G.C. - est. 4-5 years old at discovery • Many trees with decline and native borers present • Tree at right looks suspect for EAB, but is infested with native borers

  9. St Paul – Found in 2009, ~4 years old at discovery • No dead trees • Canopy thinning on ~50 trees

  10. St Paul – Found in 2009, ~4 years old at discovery • Woodpecking key to picking out suspect trees

  11. Summit / Dale – Found in 2011, ~4 years old at discovery • Decline, woodpecking, bark cracks on < 10 trees

  12. Shoreview – Found in 2011, ~3 years old at discovery • Decline in one tree initially • No woodpecking seen in July • Heavy woodpecking by November

  13. Wildlife Refuge – Houston County • Houston • Estimate 3 years old when found in 2010 • Only found due to extensive searching

  14. EAB Quarantine

  15. EAB Quarantine • No Regulated Articles are legally allowed to move outside of a quarantine (untreated or treated), unless they are accompanied by a certificate. Certificates are only available when a compliance agreement is signed between the Minnesota Department of Agriculture and the firm interested in moving the regulated article.

  16. EAB Quarantine • Regulated Articles • Emerald ash borer in any living stage of development • Ash trees • Ash limbs / branches • Ash stumps and roots • Ash logs • Ash chips (wood or bark) • Firewood of any non-coniferous species

  17. EAB Quarantine NO Maybe OK

  18. EAB Management • Sanitation • Chemicals • Biological Control

  19. EAB Management This is a hypothetical example of how EAB population increase and resulting tree mortality may occur.

  20. EAB Sanitation • Identify suspect EAB infested trees via woodpecking • Remove infested trees prior to adult emergence

  21. EAB Chemicals

  22. Biological control

  23. Egg parasitoid, Oobius agrili

  24. H. Liu, USDA

  25. Larval parasitoid, Spathius agrili

  26. Spathius agrili J. Plunkett

  27. Larval parasitoid, Tetrastichus planipennisi

  28. Tetrastichus planipennisi J. Lelito

  29. Questions

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