Toxicological Studies On cotton Leafworm Spodoptera littoralis Boisd

Susceptibility of S.Littoralis eggs and larvae to different insecticides ,rate of development of resistance in S.littoralis eggs five insecticides under laboratory condition ,cross resistance to different insecticides in five selected strain of S.LittoralisThe effect of eggs selaction with five insecticides on the biology and biotic potential of S.Littoralis.