Caterpillars, such as the grape berry moth larva, feed on grapes and grapevine leaves. When the caterpillars infest your grape vines, they can ruin your crops.Click to see full answer. Correspondingly, how do you get rid of caterpillars on grapes?Hand pick achemon sphinx caterpillars and drop them into a bucket of soapy water at least once a day until they become difficult to find on the vines. Check vines less frequently, as little as once a week, after that. can caterpillars eat fruit? !” When most of us think of caterpillars’ feeding habits, we picture a whole lot of leaf eating. But, as many of you know, some caterpillars eat other plant parts, such as flower petals, stems, fruits, roots, pollen, and seeds. Other caterpillars can eat non-plant organisms. Hereof, what kind of food do caterpillars eat? Caterpillars, the larvae of butterflies and moths, feed almost exclusively on plants. You will find most caterpillars munching happily on leaves, though some will feed on other plant parts, like seeds or flowers.What caterpillar eats grape leaves?The western grapeleaf skeletonizer (Harrisina brillians) is a moth that lays clusters of eggs on the undersides of the leaves of grapevines (Vitis spp). When the eggs hatch, the released larvae feed voraciously on the leaves, leaving behind only the leaves’ veins.