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Functional response of Scymnus (Pullus) argentinicus (Weise) (Coleoptera: Coccinellidae) at different densities of greenbug Schizaphis graminum (Rond.) (Homoptera: Aphididae)



Functional response of Scymnus (Pullus) argentinicus (Weise) (Coleoptera: Coccinellidae) at different densities of greenbug Schizaphis graminum (Rond.) (Homoptera: Aphididae)



Anais da Sociedade Entomologica do Brasil 26(3): 495-502



The functional response, search time and handling time of the predator Scymnus argentinicus were evaluated. Nymphs of Schizaphis graminum in their 3rd and 4th instars were provided as food. Three densities of prey (10, 25, 35 nymphs) and four instars and adults of the predator were used, in 10 replications. Tests were conducted in an environmental chamber at 25+or-1 degrees C, 70 +or- 10% RH and 14 hours photophase.

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