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Locust Leaf Miner: Cause of Brown, "Fired" Foliage

Pest Profile

Small green bugs are likely locust leaf miner larvae mining inside leaves, causing brown, blistered foliage that clings to the tree. Adults are small beetles with orange thorax and black stripe.

Control

Systemic: Acephate (Orthene) or Bayer Advanced Tree & Shrub Insect Control (imidacloprid soil drench) for best penetration into mines.
Timing: Spray adults in late spring or larvae in early summer.
Natural enemies usually keep populations in check; chemical control rarely needed.

Trees: Elm Tree with Peeling Bark and Defoliation: Insect Feeding Likely; Willow/Poplar Weevil Late Season: Identification First, Treatment Next Spring; Locust Leaf Drop and Sooty Mold on Understory Plants; Honey Locust Plant Bug: Cause of Season-Long Leaf Drop; Locust Tree Leaf Drop: Insects or Drought?; Fall Webworms in Trees: Cosmetic, Manageable; Honey Locust Leaf Drop: Root Stress from Weather Extremes; Honey Locust Sudden Defoliation: Water Stress or Root Rot; Red Lady Beetles on Royal Empress: Aphid Predators, Not Pests; Cherry Leaf Spot: Fungal Disease on Flowering Cherry

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