Sticky Weeping Willow in Idaho: Aphid Honeydew

Everything Sticky Under the Tree

Aphids feeding in canopy excrete honeydew that rains down. Ants, wasps, sooty mold follow. Hot, dry weather often increases aphid pressure.

Systemic soil drench: Imidacloprid (Bayer Advanced) – season-long, homeowner-applied.
Foliar spray: Acephate, bifenthrin, oils – difficult on large willows.

Treat now; sticky residue will cease as aphids die.

Trees: Persistent Aphids on Fuchsia: Raise Plant Sugars with Atomic Grow; Weeping Willow and Crepe Myrtle Decline: Scale Insects, Not Shock; Weeping Bald Cypress: Sticky Sap = Aphids, Not Tree Sap; Weeping Willow vs. Hybrid Willow: Why Yours Don't Weep; Distinguishing Salix Blanda and Salix Babylonica Willows; Globe Willow Aphid Infestation: Sooty Mold and Systemic Control; Aphid Honeydew on Beech Tree: Identification and Control; Red Bumps on Weeping Willow Trunk: Scale or Adventitious Buds?; Diagnosing and Treating Aphid Honeydew on Chinese Elm; Aphids: Tiny Sap-Suckers That Multiply Explosively

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