Occurrence of flour mite Acarus siro Linn. in rice mills.
1988
Prakash A. | Rao J.
Acarus siro (Tyroglyphus farinal Linn.), a polyphagous flour mite, was reported for the first time in milled rice samples collected from storage godowns in Cuttack, Puri, and Balasore districts of Orissa [India] 1984-86. Twenty-five-gram samples were examined under stereoscopic binocular microscope to determine mite population (eggs, juveniles, and adults). Grain moisture content of each sample was measured by the Oswa Universal Moisture Meter. Stored rice harbored a range of mite populations, depending on storage period, rice variety, and grain moisture. Mite populations showed significant differences among four test varieties - CR1014, Ratna, Jaya, and Pusa 2-21. The mite occurred in almost all samples collected from ten rice mills. Mite populations increased significantly across storage from 6 to 24 mo. Grain moisture of the samples ranged from 16 to 19%, considered a congenial moisture range for mite multiplication. In addition, the mite was found in such rice products as bran and suji (powdered rice) stored in godowns of the mills.
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