To kill armyworms effectively, several methods are recommended depending on the scale and location of the infestation:
- Hand-picking and dropping the worms into soapy water is a simple and chemical-free method for small infestations, especially in gardens.
- Spraying plants with Bacillus thuringiensis (Bt), a natural bacterial insecticide, is effective and safe for humans and beneficial insects. It works when worms ingest the sprayed leaves.
- Beneficial nematodes, microscopic organisms that prey on armyworms, can be applied to the soil to control larvae naturally.
- Insecticides can be used for larger infestations or lawns. Granular products like Acelepryn (chlorantraniliprole) and liquid insecticides like Mirimichi Green Pest Control are effective and safe for the environment.
- Other chemical options include spinosad and contact insecticides containing bifenthrin, cyfluthrin, or permethrin, but these should be used carefully following label instructions to avoid harm to beneficial insects and humans.
The best approach often combines early detection with prompt treatment using targeted products to prevent widespread damage.
