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Extension Entomology

Tag: ash tree

Emerald Ash Borer In Kansas: Another Quarantined County

by–Dr. Raymond Cloyd

If you have not heard, on September 30, 2015 an Emerald ash borer (Agrilius planipennis) larva was found in a girdled trap tree in Eudora, KS (Douglas County) by the Kansas Department of Agriculture. This means that Kansas has four counties in which Emerald ash borer has been detected, and subsequently quarantined, including Wyandotte, Johnson, Leavenworth, and Douglas. First detected in 2002 in Michigan, the Emerald ash borer has been found in 23 states throughout the USA (Figure 1), and is responsible for causing the death of over 30 million ash trees. For more information regarding Emerald ash borer, contact the Kansas Department of Agriculture or the Department of Entomology at Kanas State University (Manhattan, KS).

Figure1DistributionMayofEmeraldAshBorerAugust32015

 

Figure 1: Distribution May of Emerald Ash Borer August 3, 2015

And Still Talking About Ash Trees – Brownheaded Ash Sawflies

—by Dr. Bob Bauernfeind

Based on reports posted by Department of Entomology Diagnostician regarding her having received specimens of adult brownheaded ash sawfly, I went out to a site where ash trees have been heavily infested the past couple of years. And, they are back. Though from a distance all appears normal, upon closer look, “pinhole feeding” is underway. By enlarging the image, the still-wee-larvae responsible for the “nibble holes” can be easily seen.

To treat or no-to-treat becomes an individual’s decision. Should trees become defoliated, they will rapidly recover, producing a flush of new foliage.

Brownheaded Ash Sawflies

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