the latter produces aflatoxin - a potent carcinogen. A batch that contains mold-infested walnuts should be entirely discarded.

The ideal temperature for the extended storage of walnuts is -3 to 0 C with low humidity for industrial and home storage. However, such refrigeration technologies are unavailable in developing countries where walnuts are produced in large quantities; walnuts are best stored below 25 C with low humidity. Temperatures above 30 C and humidity