How do I know which concentration to buy?

Consumer (RTU/concentrate) products are formulated for homeowner application rates. Professional-grade concentrates require accurate dilution — mistakes in either direction reduce effectiveness or create safety hazards. If you're new to pesticide application, start with ready-to-use formulations and work up to concentrates once you understand mixing and rates.

Can I mix this with other pesticides?

Tank mixing is common in professional applications but requires compatibility testing and label compliance. Never mix pesticides unless both labels permit it. One safe and effective combination: pair an adulticide with an IGR — they attack different life stages and don't interfere with each other.

How long does the treatment remain effective?

Residual activity depends on formulation, surface, UV exposure, and temperature. Micro-encapsulated formulations last longest (4–12 weeks). Wettable powders and emulsifiable concentrates typically last 2–6 weeks outdoors. Indoor applications on non-porous surfaces can persist significantly longer.

Is this product safe for use around pets and children?

All pesticides have some level of toxicity — 'safe' means used correctly according to the label. Keep children and pets out of treated areas until completely dry (minimum 2–4 hours for most sprays). For households with infants or chemically sensitive individuals, discuss low-exposure options (baits, dusts, IGRs) with a pest management professional.

Bt kurstaki

⚖️ Educational use only. Always read and follow the full product label — the label is the law under FIFRA. Full disclaimer → | ⚗️ Mixing Calculator →

🏷️ Brand Names — Same Active Ingredient

DiPel DF — Valent BioSciences — professional WDG

Thuricide — Certis — consumer liquid concentrate

Javelin WG — Certis — professional WDG

Dipel PRO DF — Valent — higher concentration

🎯 What It Kills

✓ Caterpillars ONLY — Lepidoptera larvae✓ Cabbage Looper✓ Imported Cabbageworm✓ Tomato Hornworm✓ Gypsy Moth✓ Fall Armyworm✓ Bagworm✓ Spruce Budworm

⚙️ How It Works

Bt kurstaki produces Cry1A proteins that destroy caterpillar gut lining. Completely selective — only caterpillar larvae are affected. Non-toxic to humans, mammals, birds, fish, and bees. OMRI-listed.

⚗️ Mixing & Application

Thuricide: 1–3 tsp per gallon. DiPel DF: 0.5–2 lb per 100 gallons. Spray leaves thoroughly — caterpillars must eat treated foliage. Reapply every 5–7 days and after rain.

⚗️ Open Mixing Calculator →

⚠️ Safety

⚠ Not effective against adult butterflies or moths — larvae only
⚠ Bt kurstaki does NOT work against Colorado potato beetle — need Bt tenebrionis
⚠ Resistance has developed in some populations
⚠ Degrades rapidly in UV — apply in evening

📋 Safety Data Sheet (SDS)

📄

DiPel DF — Safety Data Sheet

The SDS document preview will appear here once the first-page image is uploaded to your server.

📎 To display the SDS preview:
1. Open the SDS PDF for this product
2. Screenshot or export page 1 as a JPG image
3. Upload to /sds/bt-kurstaki-sds-page1.jpg
4. The image will display automatically here

📄 Search for this SDS on CDMS →

📄 DiPel DF — Safety Data Sheet · View the complete SDS document above or download below

📄 CDMS Label & SDS Database 📄 EPA Label Search

📚 Sources: EPA Pesticide Labels · NPIC Pesticide Info

Published: Jan 1, 2025 · Updated: Apr 7, 2026

Bt kurstaki — DiPel, Thuricide