Characteristics of successful natural enemies in models of biological control of insect pests

Abstract
Biological control of insect pests was characterized by a persistent, strong reduction in the pest population following the introduction of a natural enemy [either parasites such as Hymenoptera and Diptera or, more rarely, predators]. Analysis of mathematical models suggested that differential exploitation of patches of the pest is a spatially heterogeneous environment provided the most likely mechanism to account for known successes.