Effect Of Some Known Synergists On The Efficiency Of Some Insecticides Against The Cotton Leafworm ,Spodoptera Littoralis Boisd

The Present Study The interaction of tcp , piperonylbut oxide and thanite with several insecticides belonging to four major groups namely chlorinated hydrocarbons organophosphates carbamates and pyrethroides was investigated in susceptible strain of the egyption cotton leafworm Spodoptera Littorralis Boisd.