Laboratory Studies of Methyl Bromide as an Insect Fumigant1

Abstract

In its toxicity to several stored product insects CH3Br compares favorably with HCN, chloropicrin and ethylene oxide. The eggs of Tribolium conjusum are less resistant to it than the adults. Its toxicity is affected by temp, to the same degree as that of CS2 and less than that of chloropicrin. It is generally more effective in the presence of moisture. It does not affect germination of corn, wheat, oats, barley, beans and peas. The influence of reduced pressures upon the toxicity of CH3Br in the presence of different absorptive materials was measured, as well as the "absorptive ratios" for most common fumigants in the presence of wheat flour.