Effects of feeding on flour moth on the functional response of the parasitoid bee Habrobracon hebetor Say (Hymenoptera: Braconidae) under the following doses of two pesticides Deltamethrin and Trichlorophen

One of the most biological control agents is Habrobracon hebetor especially for Indian meal moth. Functional response studies are suite index for successful using natural enemies in pest control programs. Using pesticides could be affected on functional response indexes and efficiency of natural enemies. In this research, has been studied the effect of sublethal doses of Deltametrin and Trichlorofen on functional responses of H. hebetor at controlled condition (26±1 Celsius, 65±10% humidity, 16:8 L: D). larvae, pupae and adults of Indian meal moths has been used separately at 2, 4, 8, 16, 32, 64 and 128 densities, for larvae and pupa dipping method and for adults contact method in exposed cages are used. Functional response and its parameters determined respectively by logistic regression and non-linear regression with SAS software. Results showed H. hebetor on larvae and pupae had functional response type 3 but on adults was functional response type 2 affected by both insecticides. Searching efficiency of bees that affected by Deltametrin for control, larvae, pupae and adults were determined respectively 0.009, 0.008, 0.009 and 0.056 /h and handling time were 0.74, 0.86, 0.91 and 0.96 houres. Searching efficiency was affected by Trichorfen in control, larvae, pupae and adults were recorded respectively, 0.009, 0.008, 0.007 and 0.78 /h and handling time were 0.74, 0.99, 1 and 2.13 hours. These results showed that sublethal doses of both insecticides have been affected only on adult moth’s functional response parameters of H. hebetor and showed significant difference.