Kansas State University


Extension Entomology

Alfalfa Weevil Update

–by Jeff Whitworth and Holly Davis

This week’s cool, wet weather has kept many growers and applicators out of alfalfa fields.  The cooler weather has slowed down alfalfa weevil activity – but not by much.  Remember, they feed 24/7 as long as the ambient temperature, where they are feeding, is over 48°F. Thus, field monitoring needs to continue until most larvae have pupated or fields are swathed, as weather allows.

If insecticide applications are chosen please remember to consult the label for the pre-harvest interval (PHI) of the insecticide selected.  For more information relative to alfalfa weevil management, please refer to the KSU Alfalfa Insect Management Guide: https://www.bookstore.ksre.ksu.edu/pubs/MF809.pdf


Leave a Reply

Your email address will not be published. Required fields are marked *

Subscribe By Email

Get every new post delivered right to your inbox.

This form is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.