Bacillus thuringiensis strain RTI545

Bacillus thuringiensis strain RTI545 is a biological active ingredient categorized as a microbial insecticide. It has gained recognition in professional agriculture due to its high specificity and ability to suppress major lepidopteran pests, making it a cornerstone for Integrated Pest Management (IPM) strategies.

The mode of action for this strain relies on the production of crystalline proteins (cry toxins) during sporulation. Once these toxins are ingested by the larvae, the alkaline gut environment of the insect dissolves the crystals, releasing active toxins that cause gut lysis, resulting in the insect's cessation of feeding and subsequent death.

This active substance is effectively used on a wide range of crops, including horticultural, ornamental, and broad-acre agricultural plantings. It is specifically targeted against various larval stages of moths, loopers, and other caterpillars that damage foliage, stems, and fruits throughout the growing season.

Application practices require precise timing to target young larval instars, which are most susceptible to the microbial toxins. Because the product works via ingestion, ensuring uniform spray coverage across the foliage is critical. It is often recommended to apply the product when pest populations are in their early development stages to prevent significant economic losses.

Safety precautions during handling involve standard protective measures, such as wearing gloves and protective clothing to avoid skin and eye irritation. While the strain is safe for non-target species, including beneficial predatory insects and pollinators, it should be stored in a cool, dark place to maintain the viability and potency of the bacterial spores.