Cercospora leaf spot of Peppers

Circular spots appear with a light gray center and a reddish-brown margin, growing up to 1 cm in diameter. Spots later become tan with a dark ring and a yellowish halo around the ring, resulting in a “frog-eye” appearance. Under conditions of high humidity, and using a good high magnification hand lens, thin, needle-like spores may be seen in the center of the spots arising from small black fungal tissue. The affected centers of lesions dry and often drop out as they age. When numerous spots occur on the foliage, the leaves turn yellow and may drop or wilt. Defoliation is often serious, exposing fruits to sun scald.