You Are Here: Management Updates 2002 Archive June 27, 2002

Date: June 27, 2002
Category: Insects
Subject: Hyperodes Weevils are Popping

We have had several reports today (isn't e-mail wonderful???) of superintendents finding Hyperodes weevils (annual bluegrass weevils) in large numbers in the baskets as they mow greens or tees. While the reports have come primarily from the metropolitan New York area so far, the phenomenon is likely to be occurring throughout much of southern New England as well. The recent stretch of warm weather has accelerated the development of the insects, and all of a sudden they are "hot to trot".

The adults we are seeing now are the new adults emerging from the most recent onslaught of larvae, and they will be mating and laying eggs to start a second generation very soon.

If you are seeing large numbers of adult weevils in the baskets, this would be an excellent time to apply a synthetic pyrethroid. The idea is to kill the adults before they have a chance to lay eggs. Follow with a light irrigation (one or two passes of the sprinkler head). Our field trials over the years have not shown any difference between granular and sprayable formulations.

Those of you in areas further north, consider this as your "heads up" - start watching for those telltale weevils in the baskets.

A cautionary note - remember that each state has its own set of regulations and registrations so be sure the material is labeled in your state before you treat!

- Submitted by: Dr. Pat Vittum