- Author: Rachael Long
- Author: Ian Grettenberger
- Author: Daniel H Putnam
Published on: August 30, 2020
Many splotches on your windshield? You are not alone.
Summertime brings various worm pests, including beet armyworm (Spodoptera exigua) and western yellowstriped armyworm (Spodoptera praefica), and alfalfa caterpillars (Colias eurytheme). Armyworms are larvae of moths while alfalfa caterpillars are larvae of the pretty white and yellow butterflies (aka. sulphur butterfly), that we see flying around alfalfa fields. Females tend to be white and males yellow.
Figure 1. Alfalfa Butterfly (AKA sulfur butterfly) adult feeding on flowers. (photo: Kathy Keatley Garvey)
VIDEO SHOWING ALFALFA CATERPILLARS IN THE FIELD...
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