The Effects of Time and Temperature on Methyl Bromide Fumigation of Adults of Sitophilus granarius and Tribolium confusum1

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Abstract
The effects of temperature and length of exposure on the concentration of methyl bromide required to produce mortality in 2 species of stored-product insects were investigated. The results indicate that between 2 and 12 hours the concentration X time product for Sitophilus granarius (L.) is constant at a single temperature, but for Tribolium confusum Jacquelin duVal the concentration X time product increases as the length of exposure increases. In both species the effect of temperature between 80°F and 50°F was logarithmic, and the efficiency of the fumigant increased as the temperature increased.