author(s)
RK Bagri, J Singh, SK Goyal, Nitin Chawla and Manju Kumari

abstract
Downy mildew disease of bottle gourd (Lagenaria siceraria (Mol.) Standl) is one of the most important foliar diseases, causing significant loss in India. downy mildew disease found to cause serious losses in bottle gourd crop throughout Rajasthan and other states. Characteristic symptoms are first appear as pale green area on the upper surface of leaves that changes to bright yellow angular or rectangular spots. Leaf spot are irregular or blocky in appearance and are delimited by leaf veins. The minimum disease incidence (4.09%) and maximum yield (338.5q/ha) were observed in treatment T₅(T₀+ Seed treatment with carbendazim 12%+ mancozeb 63% @ 3 g/kg and drenching of Captan 70% +Hexaconazole 5% WP @ 0.1% 15 days after germination followed by spraying of Tebuconazole 50% + Trifloxystrobin 25% @1g/l + spray with (Imidacloprid 17.8 SL @ 7.5 ml/ 15 l + Neem oil 0.2%) followed by Fosetyl-Al @ 0.1% followed by spraying of Tebuconazole 50% + Trifloxystrobin 25% @1g/l + spray with (Imidacloprid 17.8 SL @ 7.5 ml/ 15 l + Neem oil 0.2%) followed by Fosetyl-Al @ 0.1% at 10 days interval) while maximum disease incidence (28.54%)and minimum yield (225.7 q/ha)were observed in treatment T₇(Control). Natural products such as herbal extracts may provide alternatives to synthetic fungicides.