Abstract: Objective To investigate the Blomia tropicalis breeding status in the ground dust rice collected in Haikou City. Methods Totally 17 samples of ground dust rice were collected from 10 sampling sites in Haikou City. Then 10 g of dust rice was taken from each individual sample for isolation of the mites that were made of slide specimen， and the mites were identified and classified under a microscope. Results B. tropicalis mites were found in all the 17 samples with the detection rate of 100%. A total of 1 176 heads of B. tropicalis were isolated， with an average breeding density of 6.91 heads/g. Conclusion B. tropicalis breeding status is severe in Haikou City. The effective measures should be taken to prevent and control the harm associated with B. tropicalis contamination.

Key words: Blomia tropicalis, Acaroid mite, Ground dust rice, Haikou City

摘要： 目的 调查海口市地脚米中热带无爪螨的孳生情况。方法 从海口市龙华区10个采样点采集地脚米共17份，每份样本称取10 g，分离其中螨类，常规方法制成玻片标本，在光镜下根据螨的形态特征对螨种进行鉴定、分类。 结果 17份样本中均检出热带无爪螨。共检出1 176只，平均孳生密度为6.91只/ g。 结论 海口市地脚米中热带无爪螨孳生密度较高，应采取措施防止其引起的危害。

关键词: 热带无爪螨, 粉螨, 地脚米, 海口市