LABORATORY EVALUATION OF CHEMICAL CONTROL OF AFLATOXIN PRODUCTION IN UNSHELLED PEANUTS (ARACHIS-HYPOGAEA L)

Propionic acid (ammonium salt) at 3000 mg/kg (PA1) and 5000 mg/kg (PA2 ) of unshelled peanuts (UP); grapefruit seed extract at 5000 mg/kg (GF 1) and 10 000 mg/kg (GF2); sodium orthophenylphenate at 2500 mg/kg (SO P1) and 5000 mg/kg (SOP2); thiabendazole 1000 mg/kg (TBZ1) and 5000 mg /kg (TBZ2) were studied in the laboratory, to verify their efficiency in controlling fungal growth and aflatoxin (AF) production on moist UP (16-18% moisture content). Moist UP were put into polyethylene bags w ith cotton plugs and incubated at 30 +/- 2 degrees C for 28 days. Trea tments were considered efficient when the AF content(B-1 + G(1)) remai ned under 30 mu g/kg. PA1 treatment was efficient till 14 days of incu bation and PA2 during the whole incubation period (28 days). All other treatments were not efficient, showing AF contents from 150 to 108 33 3 mu g/kg during the incubation periods. Propionic acid, used as ammon ium propionate, at 5000 mg/kg shows promise in controlling aflatoxin p roduction when applied to moist unshelled peanuts.