Alternaria alternata, A. brassicao, A. brassicicola, A.radicina, A. raphant and A, tanulsalma wore detected from storage and field soods of Brassica napus grown. under different agroclimatic conditions of Kumaun Himalaya. Of them, A. alternata, A. brassicae and A. raphant wore foquently isolated from seeds, seedlings, leaves and pods and found to be responsible for seed and seedling infection. These species also caused necrosis of leaves and pods In later stogos. The pathogonicity tosts under glass house conditions proved the sorlous pathogenic bohaviour of these species. Thiram, Captafol, Dithane M-45 and Vitavax were found most satisfactory chemicals to control the infection of Alternaria spp. In seeds and other organs of Brassica napus.
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