Bacillus thuringiensis subsp. kurstaki strain SA-12

Bacillus thuringiensis subsp. kurstaki strain SA-12 is a biological active substance classified as a microbial insecticide. This bacterium is a soil-dwelling, spore-forming organism that produces specific proteinaceous crystalline inclusions (delta-endotoxins) during sporulation. These crystals are highly effective against the larval stages of various lepidopteran insect species.

The mechanism of action is based on the ingestion of the bacteria by the larvae. Once inside the alkaline gut of the target insect, the protoxin crystals are solubilized and activated by specific enzymes. These activated toxins bind to the receptors on the midgut epithelium, creating pores that lead to cellular disruption, gut paralysis, cessation of feeding, and eventual mortality of the pest.

This strain is widely utilized in integrated pest management (IPM) programs across various crops, including vegetables, fruits, orchards, and field crops. It is specifically targeted to control pests such as loopers, armyworms, leafrollers, diamondback moths, and various caterpillars that cause significant economic damage by defoliating crops.

Application strategies require thorough coverage of plant foliage, as the pest must consume the substance to be affected. It is highly recommended to target young larval stages for the best results. Since the spores are sensitive to UV degradation, applying the product during early morning or late evening hours maximizes its residual efficacy in the field.

• Target-specific action with minimal impact on beneficial insects and pollinators.
• Zero pre-harvest interval (PHI) for most edible crops.
• Ideal for resistance management due to its unique multi-modal action.
• Degrades naturally, leaving no harmful residues in the ecosystem.

Safety precautions include the use of standard personal protective equipment (PPE), such as gloves, masks, and long-sleeved clothing, to avoid inhalation or skin irritation during the mixing and spraying process. Although considered safe, users should always consult the specific product label for regional regulatory compliance, proper storage instructions, and compatibility with other spray tank additives.