[Thyreophagus entomophagus breeding in beer yeast powder]

To separate and identify Thyreophagus entomophagus from beer yeast powder and observe its morphological characteristics.

The beer yeast powder was collected from the scum after fermentation of the beer material, the mites in it were separated and made into slide specimens, and then they were identified and observed for the morphological characteristics under an optical microscope.

The mites separated from the beer yeast powder were identified as female Thyreophagus entomophagus. Under the optical microscope, the bodies of the mites were long and narrow, which showed an oval shape, the gnathosoma was wide, the epidermis was colorless but lustrous, the external vertical seta, internal scapular seta, inner humerals, anterior lateral seta, and dorsal body setae were all absent, the bristles on the back of the body were relatively long, and all the feet were thick and strong.

Thyreophagus entomophagus can breed in the beer yeast powder, and therefore, the powder should be stored properly to avoid the contamination caused by the mites.