Construction of Recombined Plasmid Carrying Two Bacillus thuringiensis cry Genes with Kanamycin Resistant Gene and Bioassay of Their Co-expression Insecticidal Activities in Escherichia coli

• 双价苏云金芽孢杆菌cry基因载体构建及其在大肠杆菌中表达杀虫活性