What kind of damage do caterpillars do?
Depending on caterpillar species, the damage can take different forms. Some caterpillars consume entire leaves, whereas others may just nibble holes in them. Some (called skeletonizers) feed on the leaf surface, scraping away the top layer and causing damage that way. Others (like leaf-roller caterpillars) attach leaves together with silk and hide within. Still other species (such as peach tree borers) can bore into the trunks of trees, sending up random branches from the trunk.