Global ETD Search
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Showing 1 to 9 of 9 for “"Pieris rapae"”.
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Seasonal abundance and biology of hyperparasites and their hosts associated with Pieris rapae (L.) (Lepidoptera: Pieridae) in the Brassica crop system
Hyperparasitism of beneficial parasites of Pieris rapae was studied on Brassica crops in Montgomery County, Virginia. The goal of the study was to determine whether the hyperparasites attacking the larval parasites of P. rapae were capable of eliminating an introduced population of the larval …
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Impact of the microbial pesticide Bacillus thruingiensis Berliner subsp. kurstaki on Hymenopterous parasites of the imported cabbageworm, Pieris rapae (L.) (Lepidoptera: Pieridae)
… upon parasitism of the imported cabbageworrn, Pieris rapae (L.) (Lepidoptera: Pieridae) in field broccoli (CV Packrnan) from fall 1986 to spring 1988. Perrnethrin, Dipel 4L, and ABG-6167 were not significantly different in their efficacy towards imported cabbageworm larvae. Parasitization of P. …
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Is Everything Connected? Following the Predators, Pests, and Plants Within a No-Till, Western Montana Agroecosystem
… - and one crop pest - the imported cabbage worm (Pieris rapae: Lepidoptera) - within a no-till Brussels sprouts (Brassica oleracea, gemmifera group) and red clover (Trifolium pratense) living-mulch system. Second, using two common organic insecticides - Bacillus thuringiensis var. kurstaki (Bt) …
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Is Everything Connected? Following the Predators, Pests, and Plants Within a No-Till, Western Montana Agroecosystem
… - and one crop pest - the imported cabbage worm (Pieris rapae: Lepidoptera) - within a no-till Brussels sprouts (Brassica oleracea, gemmifera group) and red clover (Trifolium pratense) living-mulch system. Second, using two common organic insecticides - Bacillus thuringiensis var. kurstaki (Bt) …
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Studies on Conura torvina (Hymenoptera: Chalcididae) Reproduction and biology in Relation to Hosts in Brassica Crops
… in 1987 as a biological control agent for Pieris rapae (L.) (Lepidoptera: Pieridae), and because C. torvina was thought to have eliminated this population of C. rubecula, studies of C. torvina's reproductive biology and behavior were initiated. A study using plants laden with "trap hosts" …
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Integration of High Residue/No-till and Farmscaping Systems in Organic Production of Broccoli
… kept the primary insect pest population (Pieris rapae, Evergestis rimosalis (Guenee), and Plutella xylostella) at a pest to predator ratio below 4:1. Although the excellent insect pest control was attributed to the farmscape plantings, pest level and crop yields were not significantly …
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Population ecology of the red admiral butterfly (Bassaris gonerilla) and the effects of non-target parasitism by Pteromalus puparum
… control of the cabbage white butterfly (Pieris rapae (L.)); the latter is an adventitious arrival from Australia. The objective of this thesis was to quantify, using population models, the effect that P. puparum is having on B. gonerilla abundance. Population monitoring and a phenology …
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Hydrogen peroxide from photosynthesis: Theory and experiments linking elevated atmospheric CO2 with C3 plant chemical defense
… herbivore, the imported European cabbageworm Pieris rapae. When P. rapae fed on mutants of A. thaliana with altered starch metabolism, P. rapae caterpillars differentiated between genotypes that accumulate starch versus genotypes that under-accumulate starch. Together with the work of Tang …
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Specificity in the ecology and evolution of plant defense against herbivores: Identity and history
Biotic interactions can structure communities, drive succession, and account for patterns of biodiversity, yet we currently know little about how multiple biotic factors interact to influence traits in ecological and evolutionary time. Moreover, variation in biotic interactions among native and …