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Golden Raintree Decline: Black Twig Borer + Golden Raintree Bug—Prune, Fertilize, Soil-Drench Imidacloprid in Spring

Two Pests Identified

Black twig borer (Xylosandrus compactus): attacks pencil-size twigs, introduces ambrosia fungus. Peaks June–Sept. Control: Prune 3–4" below infested twigs, destroy debris. Mulch, avoid over-fertilizing, irrigate in drought.
Golden raintree bug (Jadera spp.): red/black nymphs, brown adults. Feed on seeds/leaves. Large numbers weaken tree. Control: Bayer Advanced Tree & Shrub Insect Control (imidacloprid soil drench) applied next spring. Roots move it to leaves; safe for bees/birds/kids. Do not inject—wounds invite decay.

Fertilization

10-10-10 at 1 lb/inch trunk diameter, scattered, watered in. Now and spring.

Product Link

Bayer 12-month Tree & Shrub Insect Control

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