B. Diseases characterized by leaf spots but no wilting of plant; with little or no spotting of the fruits.
(a) Older leaves showing numerous small, roughly circular spots 1/16" to 1/8" in diameter with dark margins and gray centers dotted with minute dark specks. Plants often seriously defoliated and fruits exposed to sun..........................................................Septoria leaf spot
(b) Large, yellowed patches on upper surfaces of older leaves; olive- brown, velvety coating of the fungus on undersurfaces of these spots. Much of foliage killed. Fruits rarely infected. (Most common in greenhouses but can occur in the field).
..................................................................Leaf mold
(c) Numerous small, dark-brown spots extending through the leaf; spots enlarging to 1/8" and centers becoming grayish brown with a glazed appearance. Yellowing, withering, and dropping of severely spotted leaves. Plants will lose foliage. (usually found in Southern areas).
......................................................Stemphylium leaf spot
Ahead to: C. Diseases characterized by leaf spots and spotting or decay of fruits, but no wilting of plant
