Round to irregular, yellowish-brown to black spots. Spots may drop out, leaving holes. Collect and remove fallen leaves. No chemical control is suggested under most conditions.

Powdery mildew (fungus)

Powdery white patches on leaves. If severe, leaves may drop early. Remove and destroy fallen leaves. If serious, use thiophanate-methyl. Make first application at bud breakand the second 10 to 14 days later. Under wet conditions, apply a third spray 10 to 14 days later.

Verticillum wilt (fungus)

Verticillum wilt Leaves on one or more branches wilt, turn brown, bend downward and drop early. Purple to blueish-brown streaks in sapwood under bark.

Cut, remove severely affected trees. If only 1-6 dead or wilted limbs, prune affected parts. Dip pruning tools in 70 percent alcolhol or 10 percent houshold bleach between cuts. No chemical control suggested. Cultivars vary in susceptibility.

Updated 3/31/05