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2077987 
Technical Report 
Sack fumigation of wheat under polythene sheets 
Iqbal, J; IRSHAD; Khalil, SK 
1993 
BIOSIS/94/09618 
9 
5 
399-402 
eng 
BIOSIS COPYRIGHT: BIOL ABS. Losses caused by insects are reduced by fumigation. The commonly used fumigant in stores is phosphine. Wheat grain fumigation under polythene sheet was tested at Islamabad. Phosphine concentration measured by Harris conductivemeter was higher in the stacks fumigated with Detia tablets @ 3 gram per ton than Phostoxin pellets at the same dose indicating that in Detia tablets more phosphine was generated. Effective fumigation was also achieved at 1 gram/ton dose. This shows that recommended phosphine dose can be reduced from 3 gram to 1 gram per ton. This dose for exposure period of 10 days also caused mortality in a resistant strain of Tribolium castaneum (Hbst.) red flour beetle (TC-33). Sealing of the stacks was variable, therefore, different level of leakage was obtained.