الفهرس | Only 14 pages are availabe for public view |
Abstract The objective of the present study is to ascertain the effect of certain insecticides on some physiological responses of the cotton leafwrom They comprise consumption, utilization of food and growth of larvae survived after treatment, as well as delayed effect of these insecticidal treatments on some biological aspects. We used three insecticides namely, (CU) profenofos (O.P.), (OR) alanycarb ro.c.) and (M: lufenuron (benzoyl urea) (IGR). The treatment was done with constam LC25 of each, to 4th instar larvae to (lab), (cu-t) and (k-f) strains. The results infer to the conclusion that the following factors may affect the physiological responses of the cotton leafworm: the toxicity of applied insecticides, the order of succession of insecticides, the degree ol susceptibility or tolerance of larvae tested, age of instar larvae testec and recent molts of instars larvae or its approach of maturity. |