the natural enemies themselves. In augmentative biological control, where the natural enemies are manipulated, 2 broad approaches, which are not mutually exclusive, can be employed. These are (1) inoculative release, in which relatively few natural enemies of the same species are released and the progeny of the natural enemies is expected to effect biological control, and (2) inundative release, in which large numbers of natural enemies are released with the expectation that these enemies will effect immediate control (i.e. acting as a biopesticide).