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Concentrations of Methyl Bromide Lethal to Insects in Grain: Laboratory Studies of Sorption Rates and Effects of Concentrations on Rice Weevil and Confused Flour Beetle

Author

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  • Whitney, W. Keith
  • Walkden, Herbert H.

Abstract

Excerpts from the report: Development of practical methods of measuring fumigant gas concentrations by thermal conductivity, and the phenomenal growth of the recirculation method of grain fumigation, have provided much information on penetration, distribution, and sorption of methyl bromide in stored products. To give additional meaning to the gas concentration data so accumulated, laboratory tests were conducted to determine relationships between concentration, time, and mortality for representative stored-product insects in recirculators filled with different kinds of grain. Experimental fumigations of different kinds of grain with methyl bromide were conducted in laboratory recirculators to determine concentrations required to kill test insects. Gas sorption by the grain was determined by thermal conductivity analyses of gas in the fumigated grain mass.

Suggested Citation

  • Whitney, W. Keith & Walkden, Herbert H., 1961. "Concentrations of Methyl Bromide Lethal to Insects in Grain: Laboratory Studies of Sorption Rates and Effects of Concentrations on Rice Weevil and Confused Flour Beetle," Marketing Research Reports 312261, United States Department of Agriculture, Agricultural Marketing Service, Transportation and Marketing Program.
    • Handle: RePEc:ags:uamsmr:312261
    DOI: 10.22004/ag.econ.312261
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