Summit Caterpillar & Webworm Control - Hose-End 1 Qt Concentrate

Overview

Summit's Biological Caterpillar and Webworm Control is an all-natural, organic liquid concentrate designed to target leaf-eating caterpillars with minimal impact on the rest of your garden. The active ingredient is Bacillus thuringiensis subsp. kurstaki (BTK), a naturally occurring bacterium that specifically affects caterpillar larvae in the Lepidoptera order. The product is easy to mix and apply via a standard hose-end sprayer, turning your garden into a careful defense against common pests without harsh chemicals.

Because the product must be ingested for effect, the caterpillar stops feeding and eventually dies within 1 to 5 days after intake. The formulation is suitable for a wide range of pests, including cabbage worm, tomato hornworm, tent caterpillar, fall webworm, Gypsy moth, and other destructive caterpillar pests. It is a 100% natural alternative to synthetic insecticides and is OMRI-listed for organic gardening, offering peace of mind for gardeners growing fruits and vegetables at home. In practice, you may notice a quiet, leaf-like sheen on treated foliage as the spray dries, followed by a reduction in visible feeding damage over several days.

What makes it user-friendly

• Easy to mix and apply using a standard hose-end sprayer, saving time and effort in the garden.
• Safe for birds, earthworms, honeybees, and ladybugs when used as directed and kept away from sensitive spaces.
• Specifically targets caterpillars during the larval stage, reducing non-target exposure compared to broad-spectrum products.

How to use for best results

• Apply when caterpillars are actively feeding on leaves, preferably in the early instars for maximum impact.
• Spray foliage thoroughly until wet, ensuring coverage on both upper and lower leaf surfaces for ingestion by pests.

Because Summit Caterpillar & Webworm Control is OMRI-listed and approved for use on edible crops, you can apply it up to the day of harvest. This makes it a practical option for gardens producing vegetables, fruits, herbs, and ornamentals without delaying harvest times.

Why gardeners choose Summit

Beyond pest suppression, this product aligns with integrated pest management by offering a natural option that minimizes disruption to soil life and beneficial insects while remaining compatible with organic growing practices. It’s a practical, non-pressuring choice for keeping foliage healthier and reducing visible caterpillar damage throughout the growing season.