Polyphagy complicates conservation biological control that targets generalist predators

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Recent advances in conservation biological control of arthropods by arthropods (2008, background): “Prasad and Snyder (2006) found, for example, that creating beetle banks increased the activity density of ground living beetles in the crop but this did not lead to increased fly egg predation.”
Conservation biological control and enemy diversity on a landscape scale (2007, background): “Another important conclusion is that the complexities of predator intra-guild interactions cannot be disregarded when developing conservation biological control schemes (Prasad and Snyder, 2006).”
The role of natural enemy guilds in Aphis glycines suppression (2008, background): “control due to negative interactions such as predator interference, cannibalism, predator avoidance behavior, and intraguild predation (Snyder and Wise, 1999; Prasad and Snyder, 2006).”
Habitat manipulation to mitigate the impacts of invasive arthropod pests (2010, background): “In a similar way, presence of alternative prey for generalist predators may in some cases decrease predation rates on the target pest (Prasad and Snyder 2006).”
Eating their way to the top? Mechanisms underlying the success of invasive insect generalist predators (2010, background): “P. melanarius was much larger than the native species, and disrupted the smaller beetles’ control of maggot pests through intraguild predation and intimidation (Prasad and Snyder 2004, 2006a, b).”