Controlling Moths and Caterpillars on Shrubs with Bt

Brown moths (likely caterpillar adults) are damaging lamb's ear and other shrubs in Virginia. The organic solution is Bt (Bacillus thuringiensis), a dust that targets caterpillars, moth larvae, and hornworms but is safe for humans, bees, and butterflies.

• Apply to foliage where larvae feed.
• Reapply after rain.
• Available at nurseries or Gardens Alive.

Encouraging beneficial insects (birds, predatory wasps) also helps long‑term.

— The Long Island Gardener