They suck sap from developing fruit. The outside of the fruit may be marked with a small, pimple-like structure at the puncture site. Matured berries may result in dried brown droplets. Miscellaneous Insects Other insects that attack grapes include caterpillars, grape flea beetle, leafhopper, grape phylloxera, and grasshoppers. Remove and burn all prunings.
Good coverage is important.
Do not use benomyl within 50 days of harvest. Captan has no time limitation. Second new shoot spray when shoots are 6 to 10 inches long Same as No. 2 spray Note benomyl limitation. Good coverage is essential.