Investigations on the efficacy of different bioagents and chemicals against grey mildew in vivo

Abstract

Advancement of biotechnological tools and genetic engineering paved the way for development of transgenic cotton (Bt cotton), which offers great promise in the control of bollworms. The commercial cultivation of such transgenic cotton conferring pest resistance began by 2002 in India. The objective of the study is to study the efficacy of different bioagents and chemicals against grey mildew in vivo. A survey carried out during kharif 2018 revealed the incidence of the grey mildew in parts of Mahoor, Kinwat, Himayatnagar, Bhokar and Hadgaon talukas of Nanded district. The maximum per cent grey mildew disease incidence was recorded in Kinwat, Mahoor and Hadgaon talukas of Nanded district. In a field evaluation of Difenconazole 25% EC (0.1%), Propiconazole 25% EC (0.1%), Propineb 70% WP (0.2%), Mancozeb 75%WP (0.2%), Carbendazim 12% + mancozeb 63% WP (0.2%), Captain 70% + Hexaconazole 5% WP (0.2%) and Sulphur 80% WP (0.2%), the treatment of Sulphur 80% WP and Captain 70% + Hexaconazole 5% WP gave better control and Difenconazole 25% EC and Carbendazim 12% + mancozeb 63% WP gave poor control against grey mildew disease.