Handout
Authors
Tim Knowles
Publication Date: August 1998 | Publication Number: az1045 Download PDF
The first sign of a potential alfalfa caterpillar (Colias eurytheme) outbreak is the influx of large numbers of yellow or white butterflies in late spring or early summer. This publication discusses the biology of the alfalfa caterpillar, the damage it causes, the biological and cultural controls, and the treatments for it.