Aspergillus flavus is a widespread species of fungus. Certain strains
produce aflatoxin, which is a potent liver carcinogen. However, some
strains of Aspergillus flavus, including the active ingredient
Aspergillus flavus strain AF36, do not produce aflatoxin. As a
pesticide active ingredient, Aspergillus flavus strain AF36 is
applied in cotton fields to decrease the amount of aflatoxin-
producing fungus on cotton. The goal is to reduce the amount of
aflatoxin that workers and the public may be exposed to from cotton
and its byproducts. Aspergillus flavus strain AF36 is not expected to
harm humans or the environment when used according to label
instructions. http://www.epa.gov/pesticides/biopesticides/ingredients/factsheets/fac
tsheet_006456.htm