Inhibition of aflatoxin production by selected insecticides

Area of Science:

• Agricultural Science
• Mycology
• Toxicology

Background:

• Aspergillus parasiticus produces aflatoxins, which are toxic secondary metabolites posing significant risks to food safety and animal health.
• Controlling aflatoxin contamination is crucial in agriculture and food processing industries.

Purpose of the Study:

• To evaluate the efficacy of various insecticides in inhibiting aflatoxin production and Aspergillus parasiticus growth.
• To determine the dose-dependent effects of these insecticides on fungal growth and aflatoxin biosynthesis.

Main Methods:

• In vitro testing of seven insecticides (naled, dichlorvos, Landrin, pyrethrum, Sevin, malathion, Diazinon) against Aspergillus parasiticus.
• Assessing inhibition of aflatoxin production (B1, B2, G1, G2) and fungal growth at 100 ppm and 10 ppm concentrations.

Main Results:

• Naled demonstrated complete inhibition of both aflatoxin production and fungal growth at 100 ppm.
• Dichlorvos, Landrin, pyrethrum, and Sevin showed significant inhibition of aflatoxin production at 100 ppm, with naled and dichlorvos also inhibiting growth.
• At 10 ppm, naled, dichlorvos, Sevin, Landrin, and pyrethrum significantly inhibited aflatoxin production, while Diazinon stimulated fungal growth.

Conclusions:

• Naled is a highly effective insecticide for controlling aflatoxin contamination by inhibiting both fungal growth and toxin production.
• The effectiveness of insecticides varies with concentration, with higher doses generally yielding greater inhibition.
• Aflatoxin B1 exhibited the highest resistance to inhibition by the tested insecticides.