Ecology, Environment and Conservation Paper

COMPARISON OF FUNGICIDES AND LEAF EXTRACTS FOR MANAGEMENT OF DOWNY MILDEW OF KNOL-KHOL (BRASSICA OLERACEA VAR. GONGYLODES L.) CAUSED BY PERONOSPORA PARASITICA (PERS.) UNDER FIELD CONDITION IN NORTH WEST HIMALAYA, INDIA

J.N. Srivastava, Gireesh Chand, Upma Dutta and A.C. Jha

Abstract

Different ten fungicides were evaluated as foliar spray against downy mildew disease of Knol-khol (Brassica oleracea var. gongylodes L.) caused by Peronospora parasitica under sick field conditions. All the fungicides gave the significantly reduction of disease than control but among the fungicides Redomil MZ was most effective treatment that reducing the maximum disease severity (14.16%) and the yield increased over control is 79.17% which is maximun, followed by Topsin-M and the least effective was Daconil. Whereas in plant extract Neem gold was most effective in the reduction of disease severity (29.6%) and the yield increase over control is 90.0% followed by Neem plant leaves extract and the least effective was capsicum plant extract.