Grape Colaspis Injury Finished for the Season

June 18, 1999
Many of you this past week indicated that you'd found grape colaspis pupae in cornfields. Textbooks suggest that larval development should be completed by mid-June for central Illinois, so your observations are right on schedule. Later this month and through early July, grape colaspis adults will become noticeable in corn and soybean fields throughout Illinois. The adults are not considered of economic importance, only that they lay eggs later in the season to begin next year's problems. Please refer to Kevin Steffey's article in last week's issue (no. 12) for more information on the life cycle of this intriguing insect pest. The good news--larval injury is over for this season.--Mike Gray

Author: Mike Gray