Early blight
residues and cause primary infection of the leaves. Survival can be several years, up to eight years for several Alternaria spp. Typically, Alternaria causes early [...] primary infection of leaves, Alternaria solani can spread to the flowers (especially dangerous in crops for seed production) and to the crown. Sporulation [...] How to prevent Early blight Remove crop residues, weeds and volunteer plants. Use clean seed and propagation materials. Practice crop rotation, in particular