	AVRDC Plant Doctor
Symptoms on vines >> Black or brown lesions on leaves

Match the symptom to your problem

Small, circular lesions form concentric rings on leaves. Lesions on stem end of fruit. Warm temps.

Large lesions rapidly spread throughout vines. Rough lesions on fruit. Moderate/cool temps.

Small (<3 mm), spots on leaves join to create necrotic areas. Brown blisters on fruit.

Gray/black spotting especially on lower leaf surface. Leaf rolling.

Small dark lesions enlarge and develop gray centers. Defoliation can be severe.

Yellow spots on upper leaf surface. Olive/brown spots on lower surface.

Leaf yellowing and browning on upper leaf surface.