Minnesota First Detectors Emerald Ash Borer

Minnesota First Detectors EAB Lifecycle David Cappaert, MSU EAB Life Cycle

Minnesota First Detectors Host Trees David Cappaert Black ash White ash Green ash Blue ash Manchurian ash Susceptibility low high Green ash (througout MN) Black ash White ash

Minnesota First Detectors Host Trees EAB and white fringetree (Chionanthus virginicus) 4 infested trees in OH, under drought stress < 5% of urban trees in SE MN Lilac and privet tested and not considered suitable hosts

Minnesota First Detectors How Does EAB Kill Trees?

Minnesota First Detectors Recognizing EAB

Minnesota First Detectors EAB Positive

Minnesota First Detectors EAB Negative

Minnesota First Detectors EAB Suspect

Minnesota First Detectors Native Ash Borers Flatheaded borers Roundheaded borers Clearwing borers Ash cambium miner Ash bark beetle Carpenterworm William H. Hoffard, USDA Forest Service

Minnesota First Detectors Diagnostic Symptoms “S” shaped galleries EAB Larva

Minnesota First Detectors Diagnostic Symptoms “D” shaped exit holes EAB Adult

Minnesota First Detectors Life Stages – Adults

Minnesota First Detectors Similar Damage is Found in Many Tree Types Oak Birch Aspen Honey locust Walnut Boxelder Many others

Minnesota First Detectors Progression of EAB Symptoms Increasing Numbers

Minnesota First Detectors Nodine – Found 2011 ~6-7 years old at discovery

Minnesota First Detectors Olmstead Co. – Found 2014 ~5-6 years old at discovery

Minnesota First Detectors Fort Snelling Golf Course – Found 2012 ~4-5 years old at discovery

Minnesota First Detectors St Paul – Found in 2009, ~4 years old at discovery

Minnesota First Detectors Summit / Dale – Found in 2011, ~4 years old at discovery Decline, woodpecking, bark cracks on < 10 trees

Minnesota First Detectors Shoreview – Found in 2011, ~3 years old at discovery Decline in one tree initially No woodpecking seen in July Heavy woodpecking by November

Minnesota First Detectors Wildlife Refuge – Houston County Houston Estimate 3 years old when found in 2010 Only found due to extensive searching