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Thursday, Apr. 10th 2014

Emerald Ash Borer Management

EABadultsideviewIf you live in a county where the emerald ash borer (EAB) has been detected, and you have ash trees that you plan to treat with a systemic insecticide, now is the time to apply it. Consult the map of EAB positive counties. Use of insecticides for EAB is recommended only in the same county or within 15 miles of where EAB has been detected. On large ash trees, systemic insecticides should be applied 4 to 6 weeks before EAB adults emerge. Less time is required on small trees. Adult emergence is expected in early May in southeast Missouri and mid-May in Kansas City, based on current phenology. Trees with a trunk diameter larger than 15 inches should be treated by a certified arborist. Smaller trees can be treated by the homeowner with a soil drench preparation of Imidacloprid. Applications must follow label directions. Click here for more information.


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University of Missouri Extension Master Gardener Program