Effectiveness of biopesticides against Spodoptera litura infesting groundnut under field condition

Abstract

Among the eight tested biopesticides, SlNPV 250 LE, B. bassiana 1% WP and aqueous bidi tobacco dust extract 2% found most effective and recorded minimum larval population of S. litura as well as per cent damaged groundnut plant. While, treatments of neem oil 1%, Btk 1% WP and M. anisopliae 1% WP were found moderately effective in reducing larval population and per cent damaged plant. Whereas, the treatments of azadirachtin 10000 ppm and N. rileyi 1% WP. Efficacy of biopesticides as reduction in S. litura population was SlNPV 250 LE > B. bassiana 1% WP > aqueous bidi tobacco dust extract 2% > neem oil 1% > Btk 1% WP > M. anisopliae 1% WP > azadirachtin 10000 ppm > N. rileyi 1% WP.

Impact of Weather Parameters on Population Dynamics of Tobacco Leaf Eating Caterpillar, Spodoptera litura (F.) Infesting Groundnut

“…In India, only insect pests are responsible for 10-20% crop losses and 10-25% post-harvest losses of groundnut production, with long-term storage suffering the largest losses (Shahzad et al 2023). Low population densities of defoliators make groundnuts sensitive to them, although mature plants can withstand severe leaf loss, especially during the monsoon season (Dodiya et al 2023). Tobacco leaf-eating caterpillar, Spodoptera litura (F.) is a well-known leaf feeder and with a high reproduction rate, huge damage potential and the capacity to travel over great distances in the adult stage make this polyphagous pest is economically significant (Dodiya and Barad 2022).…”

“…Low population densities of defoliators make groundnuts sensitive to them, although mature plants can withstand severe leaf loss, especially during the monsoon season (Dodiya et al 2023). Tobacco leaf-eating caterpillar, Spodoptera litura (F.) is a well-known leaf feeder and with a high reproduction rate, huge damage potential and the capacity to travel over great distances in the adult stage make this polyphagous pest is economically significant (Dodiya and Barad 2022). This insect has become a serious threat to the ecology of groundnuts because of changes in intensive agricultural cropping patterns (Rao and Rameshwar 2013).…”