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Pussy Willow Aphids, Sooty Mold, and Wasp Attraction

Pussy willow aphids

Manahawkin, NJ pussy willow (15 ft) attracts bees/wasps/hornets. Black sooty residue under canopy. Aphids visible on branches.

Ecology

Aphids suck sap → secrete honeydew (sugar-rich) → sooty mold grows on honeydew → wasps/bees feed on honeydew.

Treatment

Bayer Advanced Tree & Shrub Insect Control (soil drench): Systemic, season-long. 2-3 weeks to work.
Orthene foliar spray: Faster if tree height allows thorough coverage (both leaf sides).

Control aphids → honeydew stops → sooty mold weathers away → wasps leave.

Product Sourcing

If Bayer unavailable, contact insecticides (acephate, bifenthrin, malathion, pyrethrum, etc.) require multiple applications. Check Home Depot, Lowe's, local nurseries.

Trees: Linden Tree Aphids and June Beetles: No Connection, Honeydew Stunts Grass; Safe Aphid Control on Plum Trees: Horticultural Oil and Beneficials; Mimosa Tree Scale Insects: Soil Drench Imidacloprid; Aphids on Aspen: When to Spray and How to Fertilize; Woolly Aphids on Big Maple: Systemic Soil Drench Stops Honeydew; Tulip Poplar in Kansas: Low Aphid Risk, Systemic Backup; Building Near Mature Oaks: Root System Reality Check; Why Yellow Jackets Swarm Your Japanese Maple; Wasps and Hornets Swarming Oak: Aphids or Slime Flux?; Florida Wasps & Bees: Identification, Risks & Management

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