Abstract
Field studies showed that 11.3 metric tons of rapeseed stored in a plywood-lined granary treated with bromophos at 0.5 g of AI/m2 had residues of 0.1 to 2.6 ppm after 16 weeks and 0.4 to 3.5 ppm after a further 36 weeks of storage. The residues exceeded the Food and Agriculture Organization/World Health Organization tolerance limit of 0.2 ppm of bromophos recommended for rapeseed. Laboratory studies of insecticide uptake by rapeseed or wheat from wood or concrete surfaces treated with bromophos EC or malathion EC at 0.5 g of AI/m2 showed that uptake was higher in rapeseed than in wheat ( P <; 0.01); bromophos uptake from treated wood surfaces into rapeseed or wheat was greater than that of malathion ( P < 0.01); and uptake of both insecticides by rapeseed or wheat was greater from treated wood than concrete.
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