Abstract: Objective To study the species and density of Acaroid mites breeding in stored dry fruits. Methods The samples from the dried fruit stores and warehouses were collected， and the mites breeding in them were separated， then the slides with mites were prepared and observed by a light microscope for species identification and counting. The indexes such as the breeding density， species richness index， diversity index and evenness index were calculated. Results Totally 12 species of Acaroid mites belonging to 6 families and 10 genera were obtained from the total 49 samples. The dominant mite species were Carpoglyphus lactis， Tyrophagus putrescentiae， Acarus siro， and Caloglyphus berlesei. The breeding densities of mites in longans， filberts and plum candies were 79.78， 48.91， 35.73 mites/g， respectively， which were higher than those in other dry fruits. The seasonal variation experiment of mites found that the average breeding density of acaroid mites was higher in July and October， the richness index and diversity index reached the highest value in July， and the evenness index was higher in January and April. The observation of the growth and decline of Acaroid mites under the artificial condition found the number of Caloglyphus berlesei declined sharply and Tyrophagus putrescentiae first increased and then decreased. Conclusion The pollution of Acaroid mites is serious in the stored dried fruits， for which the positive prevention and control measures to the mite breeding should be taken to reduce the harm.

Key words: Acaroid mite； Dry fruit； Breeding density； Species richness index； Diversity index； Evenness index； Warehouse； Allergic disease

摘要： 目的 了解仓储干果污染粉螨的种类及其密度。方法 采集干果商店和仓库的储藏干果样本，分离其中的孳生粉螨，制备螨类玻片标本，光镜下观察其形态特征，进行鉴定和计数，并计算孳生密度、丰富度指数、多样性指数、物种均匀度等指标。此外，选择粉螨孳生数目较高的干果，进行人工环境下粉螨的培养观察，以了解其消长情况。结果 从49种干果样本共获得12种粉螨，隶属于6科10属，其中以甜果螨、腐食酪螨、粗脚粉螨、伯氏嗜木螨为优势螨种，在桂圆、平榛子、话梅等样本中孳生密度较高，分别为79.78、48.91、35.73只/g。对粉螨的季节变化调查发现平均孳生密度在7、10月份较高，丰富度指数和多样性指数均在7月份达到最高，均匀度指数则在1、4月份较高。人工环境下观察伯氏嗜木螨和腐食酪螨的消长情况，发现伯氏嗜木螨孳生密度逐渐下降，而腐食酪螨先增后降。结论 储藏干果的粉螨污染情况严重，应当采取积极有效的防制措施来控制粉螨的孳生，以降低粉螨带来的危害。

关键词: 粉螨；干果；孳生密度；丰富度指数；多样性指数；均匀度指数；仓库；过敏性疾病