Diagnosing Two Problem Trees: Borer and Canker

Tree 1: Borer Attack

Sap bleeding from trunk wounds. Treat with Merit (imidacloprid) trunk spray. Fertilize 10-10-10 at 1 lb/inch diameter to reduce stress.

Bark loss, dead appearance. Canker fungi invade stressed trees. Fertilize to boost vigor; no cure for established canker.

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