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Extension Entomology

Ash/Lilac Borers (ALB)

—by Dr. Bob Bauernfeind

In last week’s edition of the Kansas Insect Newsletter, Dr. Cloyd presented information on Ash/Lilac borers including the use of pheromone traps to determine the onset of current-season ALB moth activities. Coincidentally on the date that the newsletter went out (April 16), I recorded first-of-the-year catches (in the Manhattan area). The latest catch was April 21.

ALB traps

It would appear that temperatures regulate moth activities as seen on the following table:

temperature and moth activity

Sad note: Yesterday, April 14, 67 oF —- 0 ALB, 1 house wren

Now is the ideal time to initiate insecticide applications for controlling ash/lilac borer. As suggested by Dr. Cloyd, “Insecticides containing the active ingredients, permethrin or bifenthrin may be applied to the bark at least up to six feet from the base…….”. Also, treat larger limbs within reach.

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