THE VIRULENCE OF TWO BIOINSECTICIDES (PROTECTO AND VIRUSET) AND THEIR EFFICACY ON SOME BIOLOGICAL ASPECTS OF Spodoptera littoralis (BOISD.) (LEPIDOPTERA: NOCTUIDAE)

Two commercial bioinsecticides; Protecto (Bacillus thuringiensis var. kurstaki) and Viruset (Spodoptera littoralis/NPV) were bioassayed against the cotton leaf worm (CLW), Spodoptera littoralis (Boisd.) (2nd and 4th instar larvae). The obtained results reveal that Protecto was the most potent bioinsecticide compared with Viruset. Treatment of 2nd and 4th instar larvae with LC50 s of Protecto and Viruset affected estimated biological aspects. The larval, pupal, and adult longevity durations were prolonged due to treatment. It was also observed that egg number and hatchability were affected by treatment.