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Abstract
The effects of prey species and constant temperature regimes on the development of Hippodamia sinuate Mulsant were studied. H. sinuate completed larval development faster on corn leaf aphids, Rhopalosiphum maidis (Fitch), than on green bug, Schizaphis graminum (Rondani), at low temperatures, but no significant differences were evident at temperatures >2O°C. H. sinuate began development at a lower threshold temperature (7.05) and required more degree-days (338.63) for development when corn leaf aphids were the prey rather than green bugs (12.9O°C, 259.54). At 25 and 3O°C, H. sinuate larvae consumed significantly more corn leaf aphids than green bugs (both per day and total consumption), whereas significantly more green bugs were consumed at 20 and 35OC. The results of the studies confirm the importance of corn leaf aphids as an early-season, cool-temperature prey for H. sinuate .
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