Management of foliar diseases of Mustard through chemicals

Six seed dressing fungicides viz., metalaxyl, carbendazim, mancozeb, thiophanate methyl, iprodione and BAS 38601 F (a seed dressing fungicide, 40% carbendazim + 32% mancozeb) in combination with spray of mancozeb (0.25%) were tested for control of foliar diseases of mustard. Alternaria leaf spot and white rust (blister) were the only significant foliar disease. All seed treatments imporved germination and reduced disease intensity. Seed treatment with mancozeb and spray of same fungicide was most effective against alternaria leaf spot controlling up to 58–8 to 74.7% disease. The most effective seed treatment fungicides for white rust were carbendazim reducing 75.8 to 80.8% infection at first location and mancozeb controlling 62.0 to 81.8% disease. Resultswith iprodione were at par with mancozeb. Thiophanate methyl was very effective against both the diseases. Highest yield was recorded with iprodione (16.0–17.36 q/ha) and mancozeb (26.0–31.12 q/ha). The seed treatment with mancozeb or carbendazim and three spray of mancozeb wastherefore, recommended for management of foliar diseases of mustard.