Functional responses of immature stages of Propylea quatuordecimpunctata (Coleoptera: Coccinellidae) to Aphis fabae (Hemiptera: Aphididae)

摘要: Functional responses of immature stages Propylea quatuordecimpunctata (L.) to varying densities Aphis fabae Sco- poli reared on Vicia faba L. were evaluated under laboratory conditions. All larval the predator starved for 12 h prior being placed individually 24 in plastic containers with different its prey, A. fabae, potted V. plants. Logistic regression analysis proportion aphids consumed as a function initial density indicated that all instars P. exhibited type II functional response when searching Attack rates (0.059, 0.057, 0.065 and 0.064) handling times (6.18, 2.37, 1.06 0.44) first fourth instar larvae, respectively, estimated using Holling's disc equation.