Those insects that feed internally within the host, such as leaf miner and shoot borers, will be found in those specific categories, and not here.
Defoliation can occur in several different.
The most classic example is for all of the foliage to be consumed. This is known as skeletonizing. Lastly, such pests as sawfly caterpillars, on deciduous hosts, typically consume all but the main veins of leaflets and leaves. Recognizing the pattern of defoliation can often aid in the identification of the pest when only the injury remains on the host plant. Copyright 2000 University of Massachusetts Amherst , Massachusetts, 01003.