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Borers in Young Maple; Lilac Decline

Maple Borer Treatment

White larvae under splitting bark = borers. Spray trunk with Merit (imidacloprid) now. Fertilize with 10-10-10 at 1 lb/inch diameter to boost vigor.

Lilac Issues

Sparse foliage and no bloom suggest:
• Old age / rejuvenation needed (renewal prune 1/3 oldest stems yearly).
• Shade encroachment.
• Lilac borer or scale.
• Soil pH too low (lilacs prefer near-neutral).

Soil test and targeted pruning are first steps.

Trees: Maple Tree Limb Crack with Larvae: Remove Limb, Treat Borers; Red Maple Borer Infestation: Sap Flow and Bud Failure; Silver Maple Trunk Rot: Don't Foam—Fertilize and Prune Deadwood; Maple Borer Infestation in Old Wound: Treatment and Risk; Pecan Webworms: Trunk Treatment for Tall Trees; Best Mulch for Mature Maple Trees; Saving an Elm Tree from Borer Infestation; Dealing with Borer Damage in Crimson Maple Trees; Old Willow Borers: Insecticide + Fertilizer for Recovery; Co-Dominant Trunks in Maple: Why Early Correction Prevents Future Failure

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