Found on grapevine in Southern AZ
Location: Southern Arizona SE Tucson PIma county
August 3, 2011 3:18 pm
We have an infestation of what seem to be caterpillars. They start out very small and grow to be pretty hearty looking caterpillars with light green/yellow, and purple bands. They are only on the grape vine in the backyard and have not gone to any other plant in the yard. I hate to harm them but they are killing the vine. Any idea what they may be? Thank you!
Signature: Thankful for your time, Ashley Goode
We believe you would be justified in removing these Western Grape Leaf Skeletonizers, Harrisina metallica, from your grape vine. According to BugGuide: “Adults emerge and lay eggs on leaves soon after bud-break in spring. Early instars feed gregariously on undersides of leaves which they skeletonize. Later instars spread out and may defoliate entire vineyards. Several generations per year.”