Wet pistachios are susceptible to pests or become moldy. Therefore, moistened Iranian Pistachio pistachio kernels are a favorable environment for the growth and multiplication of various molds, including aflatoxin-producing fungi or molds, and especially find great potential for the growth of the first type of fungus. These fungi grow rapidly in moistened nuts that have a moisture content of less than 13% and secrete some poison into the pistachios while spoiling the nuts. The fight against this fungus inside the pistachio kernel has remained almost unresolved to this day. While it is possible to kill this fungus with chemicals and fungicides, the problem is that these chemicals and fungicides, in turn, are harmful to human health and some of them are more toxic than aflatoxin poison. The ability of pistachio kernels to contaminate such substances.