Effect various treatment of bottle gourd (lagenaria siceraria) against Downey mildew under field conditions

Abstract

Pseudoperonospora cubensis, the causal agent of bottle gourd downy mildew. Downy mildew was appeared during the course of investigation. The occurrence of downy mildew was first observed from second fortnight of December 2017 gradually increased during the crop period. The seeds treated with chemical i.e. carbendazim 12% + mancozeb 63% (3g/kg seed) considerably increased germination percentage (93.33%), root length (9.14cm), shoots length (13.11 cm), fresh weight (5.67 g), dry weight (0.66 g) and vigour index (2183.65). The minimum days to first flowering (40 DAS), fifty per cent flowering (45 DAS) and first fruiting (43 DAS). and maximum days to fruit length (37.87 cm) and girth (15.43 cm), Seed treatment with seed pro @ 25g/kg + drenching at first true leaf stage with seed pro @ 5% + spray of (imidacloprid 17.8 SL @ 7.5 ml/15L + neem oil 0.2%) + (tebuconazole 50% + trifloxistrobin 25% WG @ 1g/l) + Fosetyl-Al @ 0.1%.