Emerald Ash Borer Update

The first instance of emerald ash borer (Figure 1)  infestation in Meade County was reported recently by Abe Nielsen (Kentucky Department of Forestry). Visit the Kentucky Ash Borer Information website for the most current distribution map.

Figure 1. Newly emerged emerald ash borer adults feed on ash leaves for about 2 weeks before laying eggs. (Photo: Lee Townsend, UK)

Figure 1. Newly emerged emerald ash borer adults feed on ash leaves for about 2 weeks before laying eggs. (Photo: Lee Townsend, UK)

The degreeday accumulation in central Kentucky (base 50F) is at the level where initial emerald ash borer adult emergence can be expected. Beetles can continue to leave ash trees until about mid-May.

Management

The recommended timing for injections of emamectin benzoate (Tree-age), imidacloprid (Imicide, etc.), or azadirachtin (Azasol) is mid- to late spring after trees have leafed-out.

See Insecticide Options for Protecting Ash Trees from Emerald Ash Borer (North Central IPM Center) for the most complete information on management options.

 

By Lee Townsend, Extension Entomologist

 

 

Posted in Forest Trees, Landscape Trees & Shrubs