The Influence of Intraguild Predation on the Suppression of a Shared Prey Population: An Empirical Reassessment -- Intraguild Predation Usually does not Disrupt Biological Control -- Multiple Predator Interactions and Food-Web Connectance: Implications for Biological Control -- Inter-Guild Influences on Intra-Guild Predation in Plant-Feeding Omnivores -- Trophic and Guild Interactions and the Influence of Multiple Species on Disease -- Intra- and Interspecific Interactions among Parasitoids: Mechanisms, Outcomes and Biological Control -- Indirect Effects, Apparent Competition and Biological Control -- Ant-Hemipteran Mutualisms: Keystone Interactions that Alter Food Web Dynamics and Influence Plant Fitness -- Interspecific Competition among Natural Enemies and Single Versus Multiple Introductions in Biological Control -- Experimental Approaches to Understanding the Relationship Between Predator Biodiversity and Biological Control.