Date of this Version
Egyptian Journal of Biological Pest Control, 26(3), 2016, pp. 625-629.
Pieris brassicae L. (Lepidoptera: Pieridae) is a destructive pest of brassicaceous plants around the world. Biological control of this pest has attained much attention being environment friendly. Parasitism rate and growth of the endoparasitoid species, Cotesia giomerata L. (Hymenoptera: Braconidae) was studied on first (L I) and second (L2) larval instars of P. brassicae. Adult fresh mass and developmental time ofthe parasitoid was higher when it parasitized Ll than L2 of host larvae. Thus, host instars contributed significant variations to parasitoids adult mass accumulation during their development. Parasitized host caterpillars in L2 grew significantly larger than in L I due to less parasitism rate. Similarly, the development of C. glomerata was faster in Lias compared to L2. Larval mortality of the host and parasitoid was also significantly higher in case of Ll. It is indicated from the study that C. glomerata has a promising role managing P. brassicae larvae at early stages.