%0 Journal Article %T Synergistic Effect of Bacillus thuringiensis subsp. aizawai with Synthetic Pyrethroids against Insecticide Resistant Helicoverpa armigera (Hubner) %A P. Duraimurugan %A A. Regupathy %J Journal of Biological Sciences %D 2005 %I Asian Network for Scientific Information %X Studies were carried out to find the effects of joint action between Bacillus thuringiensis subsp. aizawai (Bta) (Agree ) and synthetic pyrethroids against third instar larvae of H. armigera on different hosts. The joint action of Bta+pyrethroids at LC25+LC25 revealed supplemental synergism as the combined application on different hosts showed 4.75-21.72 and 18.36-38.26% more than the expected mortality at LC50 of Bta alone and LC50 of pyrethroids alone, respectively. %K Helicoverpa armigera %K insecticide resistance %K B. thuringiensis subsp. Aizawai %K synergistic suppression %U http://docsdrive.com/pdfs/ansinet/jbs/2005/678-680.pdf