Net blotch of Peanut

Phoma arachidicola

Large (1/2 inch), dark patches or blotches form on the upper surface of the leaf. Lesions may have a grayish cast at first and turn dark brown as they age. Infected leaves may dry and crack with age. At first, severe defoliation may be confined to portions of a field, but the entire field can be affected in a short time.