Abstract: Objective To investigate the breeding of acaroid mites in the stored grains in Wenchang area， Hainan Province， China. Methods The breeding mites from the samples were separated by a shake?sieve and microscope directly. The isolations were used for slide preparation based on previous literature， and then under a light microscope， the identification and counting of the acaroid mites were performed. Results Twelve species of mites were identified from 20 categories of grains. They belonged to 10 genera of 4 families. Among the 12 grain samples， the breeding rates were higher of Blomia tropicalis and Tyrophagus putrescentiae. Among the 20 samples collected， a total of 5 885 mites were found， with an average breeding density of 29.43/g. Conclusion The infestation of acaroid mites appears serious in the stored grains in Wenchang area， which should be taken measures to prevent and control.

Key words: Acaroid mite； Breeding density； Wenchang City

摘要： 目的 调查海南省文昌市境内地脚米粉螨的孳生程度。方法 采用直接镜检法分离地脚米样本中孳生的粉螨，将检出的螨制成玻片标本，置于光学显微镜下观察其形态并进行螨种鉴定和计数。结果 从采集的20份地脚米中共分离出12种粉螨（5 885只），分别隶属于4科10属。总体平均孳生密度为29.43只/g，其中热带无爪螨和腐食酪螨孳生率较高。结论 海南省文昌市地脚米中粉螨孳生密度较高，应采取控制措施。

关键词: 粉螨；孳生密度；文昌市