Screening of aflatoxins in duck feedstuffs in West Java, Indonesia

During the period 1979‐1985, incoming feed ingredients (some of imported origin) for duck diets were screened for their aflatoxin level. As a result. records of aflatoxin data from 533 corn, 88 rice, 136 rice bran, 47 wheat pollard, 207 soya bean meal. 55 copra meal and 166 fish meal samples were obtained. Aflatoxin B1 was the predominant form, the incidence of samples containing it ranging from 69 to 94%; then accompanied by aflatoxin G1, 37 to 81%: by B2, 33 to 70%; by G2, 13 to 66%. Levels of total aflatoxin > 20 μg kg −1 were most frequently encountered in corn (71%) and copra meal (58%), followed by soya bean meal (20%), wheat pollard (15%), rice bran (12%), fish meal (10%) and rice (4%). Most feed ingredients contained aflatoxins < 100 μg kg−1 except in corn of which 202 samples (38%) had a higher level. Corn is concluded to be the main source of alfatoxin contamination in corn‐based mixed feeds.