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Nursery-Wide Aphid and Sooty Mold Outbreak: Effective Insecticide Rotation

Why Sevin Fails

Carbaryl (Sevin) is poor against aphids. It also kills beneficial predators, worsening outbreaks.

Recommended Active Ingredients

Imidacloprid (systemic, soil drench)
Acephate (translaminar foliar)
Bifenthrin (contact foliar)

Rotation Strategy

Alternate modes of action (IRAC groups) to prevent resistance. Example: Imidacloprid soil drench early season → acephate foliar mid-season → bifenthrin late season if needed.

Sanitation

Remove heavily infested plants, control ants (they farm aphids), and scout weekly.

Plant Diseases: Holly Scale Infestation: Oil or Systemic Insecticide; Black Sooty Mold on Holly: Control the Sucking Insects First; Datura Leaf Trails and Holes: Neem Oil for Fungus and Pests; Controlling Aphids on Plum Trees for Healthy Foliage; Gardenia Sticky Buds: Scale or Aphids; Aphids on Evergreens: Garlic, Soap, and Lady Beetle Allies; Linden Tree Aphids and June Beetles: No Connection, Honeydew Stunts Grass; Aphids and Ants on Balcony Garden: Separate Controls Needed; Managing Aphids on African Violets; Lawn Service Fungicide Failure: Kentucky Bluegrass in Virginia

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