Late Blight Symptoms on Tubers
Tubers are infected in the potato hill by late blight spores washed by water from infected foliage into the soil.
Tubers are also contaminated with spores of the fungus if they are dug while infected vines still have active lesions with viable spores.
of variable size.
There is no clear separation between the infected and the
healthy tissue.
Bacterial soft rot develops rapidly under warm,
humid conditions.
