Colorado Potato Beetles on Eggplant: Spinosad or Hand-Picking for Control

The beetles on your eggplant are Colorado potato beetles (Leptinotarsa decemlineata)—yellow-and-black striped adults, humpbacked red larvae with black spots. They feed on solanaceous crops: potato, eggplant, tomato, pepper.

Control Options

1. Spinosad (e.g., Captain Jack's Deadbug Brew, Monterey Garden Insect Spray) — very effective, low toxicity, organic-approved. Spray foliage thoroughly; repeat per label (usually 7–10 days). See livingwithbugs.com/spinosad.html.
2. Hand-picking — practical for small gardens. Drop adults/larvae into soapy water. Check daily.
3. Row covers — exclude adults early season (remove for pollination).
4. Crop rotation — don't plant solanaceae in same spot yearly.

Neem oil and pyrethrins work but are less reliable on heavy infestations. Avoid carbaryl (Sevin)—toxic to bees, resistance common.