Studies on the mycoflora of seeds.
From an analysis of the mycoflora of caryopses of wheat and barley, and of linseed, 3 types were distinguished: (a) spp. ordinarily saprophytic, but able to attack seeds under favourable environmental conditions; (b) spp. deposited on the seed surface as spores or mycelium, saprophytic at the time, but parasitic after seed germination, e.g. Alternaria linicola on linseed; (c) parasitic spp. occurring on leaves and seeds; and (d) spp. developing at the end of a generalized infection of the whole plant.