Tags: Bacteria.
Bacillus thuringiensis (or Bt) is a Gram-positive soil-dwelling bacterium commonly used as a biological pesticide. 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 flour mills and grain storage facilities.During sporulation many Bt strains produce crystal proteins (proteinaceous inclusions) called δ-endotoxins that have Insecticide action.
