Toxicity of Methyl Bromide to Acarus siro, a Cheese-Infesting Mite

Abstract
Laboratory fumigations were conducted to determine the toxicity of methyl bromide (CH3Br) to the mite Acarus siro L. when exposed for 4, 8, 16, or 24 hr. All stages of the mite were fumigated in 12-liter round-bottomed flasks at 60[plus or minus]2[degree]F and 85[plus or minus]15% RH, using a new type of exposure cage and fumigation chamber. The dosage (mg/liter) required for the LC95 varied from 16.77 for 4-hr exposure, to 8.08 for 8-hr, to 5.22 for 16-hr, to 3.36 for 24-hr exposure.

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