Enhancement of bioefficacy of insecticides on spray tank mixing with Wetcit surfactant on chilli crop

Abstract

The compatibility and effectiveness of Wetcit surfactant using as spray tank mix with insecticide formulations against mites (Polyphagotarsonemus latus) on Chilli crop was evaluated. The treatments were taken as Propargite 57% EC @ 1500 ml/ha, Emamectin benzoate 5% SG @ 200 g/ha and Buprofezin 25% SC @ 300 ml/ha alone, and as tank mix with Wetcit @ 500 ml/ha at their lower dose rate 1350 ml/ha, 180 g/ha and 270 ml/ha, respectively. Wetcit alone @ 500 ml/ha and untreated control (water alone) treatments were also taken for comparison. The mite population recorded at 5, 10 and 15 days after each spray showed that Wetcit used with insecticidal formulations resulted in low mite population than sole insecticidal treatments (without mixing with surfactant). Thus Wetcit @ 500 ml/ha used with Propargite 57% EC @ 1350 and 1500 ml/ha, Emamectin benzoate 5% SG @ 180 and 200 g/ha and Buprofezin 25% SC @ 200 and 300 ml/ha resulted to be effective with low mite population at each observation time and increased chilli fruit yield. No phytotoxicity to chilli crop was observed at each observation time. Thus, Wetcit surfactant was compatible with tested insecticide formulations and enhanced their effectiveness against mites in chilli crop.