Annals of Plant Protection Sciences

The results of leaf dip bioassay against the third instar larvae of Spodoptera litura in vitro affirmed chlorantraniliprole as the most effective insecticide in terms of toxicity. LC₅₀ values of two bio-pesticides i.e. SlNPV and Btk were 1.32 x 10⁵ POBs/ml and 0.04%, respectively. The concentration of azadirachtin required to inhibit 50% of the foliage feeding i.e. EC₅₀ was estimated to be 4.16 ppm. The relative toxicity of different insecticides on the basis of LC₅₀ value to third instar larvae by leaf dip method demonstrated that chlorantraniliprole, bifenthrin, emamectin benzoate, flubendiamide and indoxacarb were 758.33, 36.11, 31.16, 22.85 and 10.95 times more toxic than novaluron.