Leaf worm, Spodoptera litura is one of the most destructive insect pests of several agricultural and horticultural crops all over the world including Pakistan. Insecticides have been widely used against different instar larvae of S. litura to minimize the pest population on various crops. New chemistry insecticides were tested to check their toxicity against S. litura on cabbage under laboratory conditions during 2019. Emamectin benzoate was highly toxic followed by chlorantraniliprole, flubendiamide and fipronil. LC50 and LC 90 values of emamectin benzoate were 30.54, 19.73 ppm and 459.07 and 275.65ppm after 24 and 48 h, respectively. 100% mortality of larvae was recorded at all concentrations of emamectin benzoate after 72 h of treatment. The lethal concentration, 50 % (LC50) values of chlorantraniliprole after 24, 48 and 72 h were 47.03, 32.49 and 17.58 ppm, respectively. Chlorantraniliprole was found to be extra lethal insecticide than flubendiamide and fipronil. Both (LC50 and LC90) values of fipronil after 24, 48 and 72 h were 55.76, 46.26, 28.47, and 801.03, 647.27, 510.44 ppm respectively. The results concluded that emamectin benzoate has potential to be used in integrated pest management strategies to significantly reduce the pest population.
Received: June 24, 2021; Accepted: Jan 17, 2022; Published: June 15, 2022
Idrees, M. A.,
Raheel Saleem, M.,
Umair Ali, M.,
& Asnan, A.
Toxicity of Four New Chemistry Insecticides against Spodoptera litura (Noctuidae: Lepidoptera) under Controlled Laboratory Conditions,
Journal of Bioresource Management, 9