Alternaria brassicae lesions on siliqua was found directly associated with the seed infection. Intensity of seed infection, varied with the number of lesions on a siliqua. Association of A. brassicae has been demonstrated with seeds of three crops of rape seed and mustard. however the population of the colonies of A. brassicae diminished with increased storage temperature and period. Temperature played a key role in survi- val of A. brassicae than storage material and period. A. brassicae survived with plant debris burried in field below the depth of 7.5 cm. Chenopodium alba has been recor- ded as a collaterial host of A, brassicae in field.
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