Army worms can devastate vegetable crops and ornamental plants. This article highlights effective spraying options that are friendly to organic growing methods. The featured products use Bacillus thuringiensis (Bt), a natural bacteria that targets caterpillars and worm-like pests. Each product is evaluated on coverage, compatibility with edibles, and ease of use. Read on to compare options and identify the best Bt-based sprays for your garden.
| Product | Brand | Primary Use | Format |
|---|---|---|---|
| Southern Ag Thuricide BT Caterpillar Control | Ag | Caterpillar control on vegetables and ornamentals | 16 oz concentrate |
| SUMMIT 021-6 Caterpillar and Webworm Control (Hose End) | Summit Store | Broad caterpillar and webworm control, hose-end applicator | 1 quart |
| Summit Caterpillar and Webworm Control (Hose End, Concentrate) | Summit Store | Hose-end concentrate for caterpillars and worms | 1 quart concentrate |
| Monterey B.t. Bundle with Measuring Spoon | Monterey Store | Organic caterpillar and worm control; safe for beneficials | 8 oz |
| Monterey BT Bundle (16 oz) | Monterey Store | BT-based worm and caterpillar control; versatile use | 16 oz |
Southern Ag Thuricide BT Caterpillar Control
Product overview: Thuricide BT Caterpillar Control is a 16-ounce concentrate designed for organic gardeners. It uses the naturally occurring Bacillus thuringiensis to target caterpillars and worm-like pests that commonly affect vegetables and edible crops. The formulation is noted as safe for use on a wide range of plants, including edible crops, when applied according to label directions. This option emphasizes compatibility with organic growing methods and provides a flexible, broadcast-ready solution for garden use.
Key features: This product is a Bacillus thuringiensis-based insecticide formulated for caterpillar control. It is marketed as safe for edible crops and suitable for use on all plants, vegetables, and ornamentals. The 16-ounce package offers a convenient size for home gardens and smaller plots. For best results, follow the label directions and apply when pests are present, reapplying as directed for ongoing protection.
SUMMIT 021-6 Caterpillar & Webworm Control (Hose End)
Product overview: This hose-end formulation from Summit Store is designed for controlling caterpillars and webworms with a ready-to-use spray. The product details emphasize physical package dimensions, suggesting a compact, easy-to-handle unit for homeowners. While the listing highlights packaging measurements, it is useful for gardeners who want a quick, on-demand application method without diluting concentrates.
Key features: Hose-end delivery for simple application; suitable for spot treatments across vegetable, fruit, and ornamental plantings. The listing focuses on packaging dimensions, implying a user-friendly approach for residential gardens. Apply according to the label to manage caterpillars and webworms effectively while minimizing impact on non-target organisms.
Summit Caterpillar & Webworm Control (Hose End, Concentrate)
Product overview: Summit’s hose-end concentrate offers another route for caterpillar and worm control, designed to mix with water and be applied using a hose-end sprayer. This option can be convenient for larger garden areas where thorough coverage is desired without repeated hand-spraying. The product’s dimensions are listed, indicating a compact form factor suitable for typical home use.
Key features: Concentrate format compatible with hose-end sprayers; intended for caterpillars and worm pests. Adhere to label directions for safe, effective use around edible crops and ornamentals. This choice supports flexible application methods for varying garden sizes and pest pressures.
Monterey B.t. Bundle With Measuring Spoon
Product overview: Monterey’s bundle combines Bt with a measuring spoon, offering an organic option for caterpillar and worm control. The product description highlights its effectiveness against a range of worm pests, including cabbage looper and fall cankerworm, and notes safe use for earthworms and bees when used as directed. This makes it a favorable choice for environmentally conscious gardeners seeking targeted control without harming beneficial insects.
Key features: Broad caterpillar and worm control with a focus on safe, targeted use. Compatible with a variety of crops, including leafy greens and fruiting vegetables. The included measuring spoon helps with precise dilution and application, which supports consistent results when following label instructions.
Monterey BT (16 oz) Bundle
Product overview: This Monterey BT bundle provides a 16-ounce concentrate designed for organic worm and caterpillar control. It highlights usage across multiple plant types—ranging from brassicas to tomatoes and ornamentals—while emphasizing safety for earthworms, bees, and other beneficial organisms when used correctly. The bundle format supports scalable applications for larger gardens or multiple beds.
Key features: Versatile BT concentrate suitable for a wide array of crops; clarity on safety for non-target organisms when applied per directions. The product is positioned as an all-around solution for organic pest management, balancing efficiency with ecological considerations.
Buying Guide: Key Considerations For Bt Sprays And Army Worm Control
- Pest specificity: Bt products target caterpillars and worm-like pests. Confirm that army worms or cabbage looper are among the pests you’re treating on your specific crops.
- Host compatibility: Most Bt formulations are safe for a broad range of edible crops, ornamentals, and non-edible plants when used as directed. Check crop lists on the label to ensure compatibility with your plants.
- Formulation and application method: Sprays come as concentrates, hose-end mixes, or ready-to-use solutions. Hose-end options offer quick, wide-area coverage, while concentrates allow precise mixing for targeted applications.
- Timing and reapplication: Bt is most effective when caterpillars are small. Apply during early pest activity and reapply as directed, especially after rain or irrigation.
- Non-targets and beneficials: Bt is generally safe for bees and earthworms when used correctly, but always follow label directions to minimize impact on beneficial insects.
- Storage and handling: Keep containers sealed and stored in a cool, dry place. Follow label instructions for mixing and disposal to maintain product efficacy and safety.
- Coverage and scale: For larger gardens, hose-end or multiple-concentrate applications may be more efficient. For smaller plots, a ready-to-use spray might be simplest.
- Cost and convenience: Compare price per ounce and the practicality of each delivery method (spray wand, hose-end, or handheld sprayer) to determine long-term value for your garden.
- Organic certification: If you rely on organic certification for your produce, verify that the Bt product and formulation are approved by your certifier for the types of crops you grow.