The Label Facts Behind Javelin Insecticide
The loading on this one is unusual and it is the first number to look at. Bacillus thuringiensis subspecies kurstaki strain SA-11, as solids, spores and Lepidopteran active toxins, makes up 85.0 percent of the product. Other ingredients are only 15.0 percent. Potency is declared as a minimum of 24 billion Spodoptera Units per pound. The EPA registration number is 70051-66 and the signal word is CAUTION. Re-entry is four hours and the label permits application up to and on the day of harvest. Rates across the label span 0.12 to 4.0 pounds per acre depending on crop and pest. Most field situations fall between a quarter pound and one and a half.
Working With a kurstaki Bt in the Field
This has to be eaten to do anything. It is a stomach material, so a larva that never chews treated tissue is never affected, and coverage decides everything. Get the spray onto the surfaces where feeding is happening, which often means the undersides and the growing points rather than the easy upper leaves. Feeding stops within about an hour of ingestion, though death takes several days. The crop stops taking damage long before the population visibly collapses. Judge the pass on new feeding marks instead of on dead insects. Two practical limits are worth stating. Ultraviolet light degrades Bt on the leaf, so evening applications last longer than midday ones. And the material only touches Lepidoptera, which makes it a precise tool rather than a broad one. Reapply every five to ten days while pressure continues.
Key Features
- Active ingredient: Bacillus thuringiensis subspecies kurstaki, strain SA-11, at 85.0 percent
- Other ingredients: Only 15.0 percent of the formulated granule
- Potency: A minimum of 24 billion Spodoptera Units per pound
- EPA registration: Number 70051-66, with a CAUTION signal word
- Re-entry interval: Four hours from the end of the application
- Harvest: May be applied up to and on the day of harvest
- Rate: 0.12 to 4.0 pounds per acre, by crop and by pest
- Reapplication: Every five to ten days while pressure continues
- Mode of action: Ingested rather than contact, so coverage decides the result
- Spectrum: Lepidopteran larvae only, which keeps it narrow and precise
Technical Specifications
| Specification | Value |
|---|---|
| SKU | JAV4X5 |
| Brand | Certis Biologicals |
| Pack size | 5 lb bag |
| Formulation | Water dispersible granule |
| Active ingredient | Bacillus thuringiensis subsp. kurstaki strain SA-11 |
| Active percentage | 85.0 percent |
| Other ingredients | 15.0 percent |
| Potency | Minimum 24 billion Spodoptera Units per pound |
| EPA registration number | 70051-66 |
| Signal word | CAUTION |
| Restricted entry interval | 4 hours |
| Pre-harvest interval | Zero, up to and including the day of harvest |
| Label rate range | 0.12 to 4.0 lb per acre |
| Typical field rate | 0.25 to 1.5 lb per acre |
| Spectrum | Lepidopteran larvae |