Control of a Mite, Lepidoglyphus destructor, Including Hypopi, in Wheat with Carbon Disulfide1

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Abstract
Colonies of mites, Lepidoglyphus destructor (Schrank), in glass tubes inserted into metal cylinders filled with wheat, were fumigated with carbon disulfide at a rate of 10 ml of CS2 per 0.125 m3 of wheat. Gradients of carbon disulfide concentrations were established in the grain so that it was possible to study the effect of six regimes of fumigant concentrations during 10 days on the mites. Fumigant concentrations of 2 mg of CS2 per liter, or more, maintained for 7 days were required to kill the mobile stages of the mites. However, the hypopi were controlled only with carbon disulfide at concentrations that exceeded 50 mg CS2 per liter on day 1 and declined to slightly more than 10 mg of CS2/liter at the end of 10 days. Carbon disulfide has some value for the control of these mites in wheat.

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