Dogwood (5 ft) nearly dead from borers (D-shaped holes, peeling bark). New cherry (25 ft away) shows similar: bark peeling, slit with dried sap, amber glob at base. Owner applied Bayer systemic, Bio-tone, insecticide.
Dogwood and cherry borers differ. Bayer systemic takes weeks to translocate. Immediate trunk spray with Merit (imidacloprid) kills current larvae under bark while Bayer prevents new infestations.
Bio-tone fertilizer offsets stress (borers attack stressed trees). Water 1 inch weekly (pan method) through hot summer. Maintain vigor.
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