Phosphine Fumigation of Thick-Film Polyethylene Food Bags and Laminated Film Food Packets

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Small, heat-sealed polyethylene bags containing airtight food packets were fumigated with phosphine according to recommended procedures. Some internal packets contamed simulated insect penetrations. Toxic levels of phosphine were found in the 254- polyethylene film bags within 24 h, but high levels (92 ppm) were still present after 72 h of aeration. Phosphine did not permeate intact internal packets. There was no survival of Tribolium castaneum (Herbst) in packets with simulated penetrations. Some insects survived for 19 to 20 days in one type of intact, fumigated, or nonfumigated packet. None survived in the other intact, nonfurnigated packets. Phosphine residues exceeding 0.01 ppm were found in foods from slit or penetrated packets after 23 days of aeration.

Document Type: Research Article

Publication date: August 1, 1984

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