ABSTRACT
This chapter is based mainly on Glare and O’Callaghan (2000), Schnepf et al. (1998), and Crickmore et al. (1998). Bacillus thuringiensis (Bt) is now the most widely used biologically produced pest control agent. In 1995 worldwide sales of B. thuringiensis were $90 million, representing about 2% of the total global insecticide market. In 1998 nearly 200 insecticidal products were registered in the U.S. Studies have so far not shown any pathogenic action on mammals, birds, amphibians, or reptiles (Board of Agriculture and Natural Resources, 2000).
