Functional Responses of an Introduced Parasitoid and an Indigenous Parasitoid on Greenbug at Four Temperatures
| Autor: | Douglas B. Jones, Norman C. Elliott, Kristopher L. Giles, Richard C. Berberet, Mark E. Payton, Tom A. Royer |
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| Rok vydání: | 2003 |
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| Zdroj: | Environmental Entomology. 32:425-432 |
| ISSN: | 1938-2936 0046-225X |
| DOI: | 10.1603/0046-225x-32.3.425 |
| Popis: | Functional responses and superparasitism by the indigenous parasitoid wasp Lysiphlebus testaceipes Cresson (Hymenoptera: Aphidiidae) and the introduced parasitoid Aphidius colemani Viereck (Hymenoptera: Aphidiidae) on the greenbug, Schizaphis graminum Rondani (Homoptera: Aphididae), were measured at four temperatures (14, 18, 22, and 26°C) during a 24-h period (12:12 L:D). At each temperature, 5–75 greenbugs were exposed to individual wasp mating pairs for 24 h. At all experimental temperatures, functional responses for both wasps most closely fit the type III model. Instantaneous attack rates (a) for A. colemani were not significantly different among experimental temperatures. However, for L. testaceipes, the estimate for a at 14°C was significantly lower than estimates at 22 and 26°C when data were fit to a type II functional response model. When data were fit to a type III functional response model for L. testaceipes, the estimate for a at 14°C was significantly lower than estimates at 18, 22,... |
| Databáze: | OpenAIRE |
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