caa a22 4500 397571135 CHVBK 20180308164841.0 cr unu---uuuuu 161202e19960401xx s 000 0 eng 10.1093/ee/25.2.524 doi (NATIONALLICENCE)oxford-10.1093/ee/25.2.524 Tillman P. Glynn Insect Pest Management Laboratory, USDA-ARS, P.O. Box 5367, Mississippi State, MS 39762 Functional Response of Microplitis croceipes and Cardiochiles nigriceps (Hymenoptera: Braconidae) to Variation in Density of Tobacco Budworm (Lepidoptera: Noctuidae) [Elektronische Daten] [P. Glynn Tillman] The functional response of Microplitis croceipes (Cresson) and Cardiochiles nigriceps Vierick to variation in tobacco budworm, Heliothis virescens (F.), density was determined in large field cages over squaring cotton. Wasps were released in cages containing various host densities. Three methods—logit analysis, logistic regression, and comparative curve fitting with 3 foraging models—were used for the analysis of functional response data. For both parasitoid species, the Rogers functional response model fit the data well. The search rate for M. croceipes (33.12 m2/d) was not significantly different than that for C. nigriceps (24.37 m2/d). Handling time for M. croceipes (≍7 min) was shorter than that for C. nigriceps (≍91 min). The functional response curves were significantly different between species for the Rogers model, and C. nigriceps females parasitized a greater proportion of H. virescens larvae on caged cotton than did M. croceipes females. Of the 2 species, C. nigriceps should out perform M. croceipes in a cotton field. © 1996 Entomological Society of America Physiological and Chemical Ecology nationallicence Microplitis croceipes nationallicence Cardiochiles nigriceps nationallicence Heliothis virescens nationallicence functional response nationallicence search rate nationallicence handling time nationallicence Environmental Entomology Oxford University Press 25/2(1996-04-01), 524-528 0046-225X 25:2<524 1996 25 ee https://doi.org/10.1093/ee/25.2.524 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.2.524 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Tillman P. Glynn Insect Pest Management Laboratory, USDA-ARS, P.O. Box 5367, Mississippi State, MS 39762 NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/2(1996-04-01), 524-528 0046-225X 25:2<524 1996 25 ee Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford