Greenish-blue metallic adults and black larvae skeletonize leaves. Rarely kill the tree. Spray at first sight (mid-May) and repeat mid-July with permethrin, bifenthrin, spinosad, or carbaryl. Spinosad is softer on beneficials.
Pussy Willow Blister Gall: Identification and Management
Willow Leaf Beetle Control on Tall Trees: Systemic Soil Treatment
Fall Leaf Spots on Young Willow: Cosmetic Fungus, Simple Cleanup
Willow Oak Decline: Wood Ash, Soil pH, and Leaf Spot
Squash Beetle vs. Mexican Bean Beetle: Spot the Difference
Eyed Click Beetle: Dramatic Defense Mimicry in a Harmless Insect
Identifying and Controlling Brown Beetles Swarming Your Porch Lights
Weeping Willow Sudden Leaf Drop: Water Deficit or Hidden Pests
Why Your Weeping Willow Isn't Blooming and How to Revive It
Oak Leaf Blister on Willow Oak: Identification and Dormant-Season Control
Correcting Pale Green Leaves on Corkscrew Willow
Controlling Lily Leaf Beetles: Organic Methods to Protect Your Lilies
Princess Tree (Paulownia): Invasive Identification and Stump Treatment
Pine Bark Beetle Identification: Species, Attack Patterns, and Prevention
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