Efficacy and economics of different insecticides and bio-rational against Spodoptera litura (Fabr.) in Soybean

Abstract

The efficacy and economics of different IGR's, insecticides and bio-rational against Spodoptera litura (Fabr.) in soybean, revealed that at three days after first and second sprays the rynaxypyr (64.52%) and emamectin benzoate (58.84% reduction) respectively proved to be the most effective. At seven days more percent reduction in larval population found in chlorpyriphos (53.76 %) and quinalphos (58.59%) where as at 14 days the diflubenzuron (59.72%) and quinalphos (53.42%) found to be the more effective after first and second sprays respectively. Significantly higher seed yield was recorded in rynaxypyr 20 SC followed by spinosad 45SC. The highest gross income and net profit was recorded in rynaxypyr 20 SC.

Baseline Toxicity Data of Different Insecticides against the Fall Armyworm Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) and Control Failure Likelihood Estimation in Burkina Faso

“…Emamectin benzoate was found to be highly effective against all sampled fall armyworm populations. Emamectin benzoate came out to be an effective insecticide for most armyworm species: it exhibited low or very low levels of resistance in S. litura (Fabricius) (Lepidoptera: Noctuidae) (Karuppaiah & Srivastava 2013;Motaphale et al 2018;Sharma & Pathania 2014), and S. exigua (Hübner) (Lepidoptera: Noctuidae) (Saeed et al 2012;Zhang et al 2014). In a recent study, emamectin benzoate also proved to be very effective against the fall armyworm, with a low level of resistance, comparable to abamectin (Gutiérrez-Moreno et al 2019).…”

The Bio-Insecticidal Activity of Papaya (Carica papaya L.) Leaves Extract against Spodoptera litura Fabr. (Lepidoptera: Noctuidae) Larval Growth

“…The S. litura larvae attack more than 122 host plant species, including cotton, corn, and soybean. The S. litura attack may cause leaf and pod damage and lead to a 68% reduction in soybean production (Ayudya et al 2019;Motaphale et al 2017). In Indonesia, S. litura has been distributed in 22 provinces and is reported to attack 11,163 ha/year, including soybean and mung bean plants (Melani et al 2016;Indiati et al 2017).…”