BIOASSAY OF ESCHERICHIA COLI OF EXPRESSING BACILLUS THURINGIENSIS δ-ENDOTOXIN GENE AGAINST FOREST PESTS Optimization of the solid medium and fermentation conditions for high-yield conidia of Paecilomyces cicadae Effect of Psedualetia unipuncta granulovirus on the degradation of δ-endotoxin from Bacillus thuringiensis