| conservation of predatory arthropods in cotton: role of action thresholds for bemisia tabaci (homoptera: aleyrodidae). | studies were conducted in 1994 and 1995 to examine the effects of a range of action thresholds for managing bemisia tabaci (gennadius) biotype b (= b. argentifolii bellows & perring) with insecticides in cotton on populations of arthropod predators in imperial valley, ca, and maricopa, az. application of insecticides significantly reduced population densities of spiders, geocoris punctipes (say), g. pallens (stål), orius tristicolor (white), nabis alternatus parshley, zelus renardii kolenati, hi ... | 2002 | 12216807 |
| predator biodiversity increases the survivorship of juvenile predators. | when predator biodiversity strengthens herbivore suppression, the pattern generally is attributed to interspecific complementarity. however, the relaxation of intraspecific interference within diverse communities has received less attention as an underlying factor, and most experiments to date span much less than one predator generation. here, working with a community of aphid predators, we compared the survivorship of juvenile predators embedded within diverse versus single-species communities ... | 2011 | 21203775 |
| cannibalism and intraguild predation of eggs within a diverse predator assemblage. | greater biodiversity among aphid predators sometimes leads to greater predator reproductive success. this could occur if cannibalism of predator eggs is consistently stronger than intraguild predation, such that diversity dilutes cannibalism risk when total predator densities remain constant across diversity levels. we compared the frequency of cannibalism versus intraguild predation by adult predators of four species [the lady beetles coccinella septempunctata l. and hippodamia convergens gueri ... | 2011 | 22182605 |