Improving the Insecticidal Activity by Expression of a Recombinant <Emphasis Type="Italic">cry</Emphasis>1Ac Gene with Chitinase-Encoding Gene in Acrystalliferous <Emphasis Type="Italic">Bacillus thuringiensis</Emphasis>
(1) Key Lab of Microbial Molecular Biology, Hunan Normal University, Changsha, 410081, P. R. China;(2) College of Bio-Safety Science and Technology, Hunan Agricultural University, Changsha, 410128, P. R. China