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Mulberry Sap Leak and Leaf Curl: Borer Damage

Salt Lake City male mulberry: leaves curled, dark red sap spots (4-6 in) on trunk, no holes. Recent nearby root exposure. Past mealybugs, woodpeckers.

Diagnosis

Borer damage. Spray trunk with Merit (imidacloprid). Fertilize 10-10-10 (1 lb/inch trunk diameter) to relieve stress that invites borers.

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