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Bacillus thuringiensis kurstaki (Btk) is a subspecies of the Bacillus thuringiensis bacteria. It is widely used as a biological control for lepidopteran pests, such as caterpillars, gypsy moths and cabbage loopers. Btk works by producing proteins that are only toxic to this group of insects once the...

Bacillus ThuringiensisSample Pack5grams per 20L for soil drench40grams per 1000L in hydroponic reservoirsCoco drench 2.5grams per 10litres of waterMust be used as a contact pesticide for best resultsA sample pack for home use - Not supplied in large container seen in pic A certified organic pesticid...