Evaluation of Pyraclostrobin 20% WG for the control of fungal diseases in cotton

Abstract

Efficacy of Pyraclostrobin 20% WG (GSP) was tested at three doses of 375 g/ha, 500 g/ha and 625 g/ha in comparison with market sample (375 g/ha and 500 g/ha) and carbendazim 50% WP @ 250 g/ha at Regional Agricultural Research Station, Lam, Guntur, during kharif 2015 - 2016 against fungal diseases of cotton. Pyraclostrobin 20% WG (12.33% to 15.33%) was superior to carbendazim (18%) against Alternaria leaf spot. Different doses of Pyraclostrobin 20% WG were at par with 48.57% to 64.77% reduction in disease intensity. Grey mildew was controlled to the tune of 66.67% to 76.56% and rust disease from 40.74% to 58.04% indicating the efficacy of Pyraclostrobin 20% WG against major fungal diseases in cotton. Different treatments yielded 16.70 to 18.05 q/ha which were significantly at par. Highest increase in yield was recorded with carbendazim (21.3%) followed by Pyraclostrobin @ 625g/ha (21.1%). Benefit cost ratio varied from 1.05 to 1.17 in different treatments.