Schaefer Caterpillar Killer Concentrate

The active ingredient, Bacillus thuringiensis (B.t.), is a naturally occurring bacterium that only affects the digestive systems of specific leaf-eating caterpillars. Because it requires ingestion to activate, beneficial insects like honeybees and earthworms are not harmed when the product is used as directed.

No, you do not need to hit the insects directly. The product is most effective when applied to the foliage that the caterpillars are actively eating, as they must ingest the treated plant material to be affected.

Once the caterpillars consume the treated foliage, they stop feeding almost immediately. While they may remain on the plant for a short period, they will cease causing damage and die within a few days.

Yes, this organic formula is suitable for use on vegetables, fruits, and ornamentals. Always check the label for specific pre-harvest intervals to ensure you are following safety guidelines before consuming your produce.

Since this is a concentrate, you will need to dilute it with water according to the instructions on the product label. Using a standard garden sprayer is the most effective way to ensure even coverage on your plants.

Application frequency depends on the severity of the infestation and environmental conditions. It is best to reapply as needed, especially after heavy rainfall, to maintain a protective coating on the leaves.