Alfalfa Weevil in Utah

Authors

Kaitlin Rim, Utah State University
Joseph Clarine, Utah State University
Steven Price, Utah State UniversityFollow
Ricardo Ramirez, Utah State UniversityFollow

Document Type

Factsheet

Publisher

Utah State University Extension

Publication Date

6-4-2020

First Page

1

Last Page

4

Abstract

The alfalfa weevil is a major pest throughout Utah. It is a beetle with one generation per year. Eggs hatch in the spring, and the grub-like immature weevils (larvae) feed by chewing on the alfalfa foliage. In high numbers, alfalfa weevils can cause severe damage to Utah alfalfa. In any given year, however, the weevils are few enough in number in many fields to cause only minor damage. Monitor larval populations in early spring using sweep net or stem count methods. Insecticide resistance can be reduced by spraying only when needed, properly timing sprays, and rotating between modes of action.

Recommended Citation

Rim, Kaitlin; Clarine, Joseph; Price, Steven; and Ramirez, Ricardo, "Alfalfa Weevil in Utah" (2020). All Current Publications. Paper 843.
https://digitalcommons.usu.edu/extension_curall/843