Bacillus thuringiensis | 農藥合法資訊網

Uponsporulation,B.thuringiensisformscrystalsofproteinaceousinsecticidaldeltaendotoxins(δ-endotoxins)calledcrystalproteinsorCryproteins,whichare​ ...

Species of bacteria used as an insecticide

Bacillus thuringiensis (or Bt) is a Gram-positive, soil-dwelling bacterium, the most commonly used biological pesticide worldwide. B. thuringiensis also occurs naturally in the gut of caterpillars of various types of moths and butterflies, as well on leaf surfaces, aquatic environments, animal feces, insect-rich environments, and flour mills and grain-storage facilities.[1][2] It has also been observed to parasitize other moths such as Cadra calidella—in laboratory experiments working with C. calidella, many of the moths were diseased due to this parasite.[3]

During sporulation, many Bt strains produce crystal proteins (proteinaceous inclusions), called delta endotoxins, that have insecticidal action. This has led to their us...