Abstract
Laboratory observations indicated that efficiencies of Campylomma sp. in attacking the greenhouse whitefly, Trialeurodes vaporariorum (WESTWOOD), were 70-100% in all cases of different predator and prey developmental stages except for five in which young mirids attached old whiteflies. The handling time and feedling time and feeding time increased with an increase in whitefly instar and decreased with an increase in mirid instar; for young mirids these periods were shorter when old whiteflies were attached. When the whiteflies aged, the region where stylet insertion took place changed from the dorsal part of the prey to the side. An important factor determining successful insertion of the stylets may be the thickness of the prey cuticle.
