Powdery mildew of Peppers

The most noticeable of the sign of the disease is a white, powder growth on the underside of leaves. Light green to yellow lesions with necrotic centers may form on the upper leaf surface. Eventually, the entire leaf turns pale yellow or brownish. Symptoms develop on older leaves first. When conditions are highly favorable for disease development, the pathogen may sporulate on the upper leaf surface. The edges of infected leaves eventually curl upward, revealing the fungus on the lower surface. Infected leaves drop prematurely from the plant, exposing fruit to the sun, so that they may subject to sunscald.