Moist, brown to brown lesions developing on leaves in contact with or near the ground. These lesions are initiated on leaves from or near the base of the main vein (figures 1 and 2) or randomly on the leaf blade (figure 3). They turn brown and gradually become necrotic.
The rot sets in and can gradually reach the collar.
Generalized rot in the apple.
Wilting, yellowing of leaves, collapse of plants followed by their progressive decomposition.
Affected plants distributed in more or less wide foci.
Signs : dense whitish mycelium covering the damaged organs (figure 3). Smooth structures, rather spherical (1 to 3 mm in diameter), initially white, then fawn to reddish brown, gradually visible within the mycelium: sclerotia resembling mustard seeds (figure 4).