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Optimizing cold storage of the ectoparasitic mite Pyemotes zhonghuajia (Acari: Pyemotidae), an efficient biological control agent of stem borers

文献类型： 外文期刊

作者： He, Limin 1 ; Li, Litao 1 ; Yu, Lichen 1 ; He, Xiong Z. 2 ; Jiao, Rui 1 ; Xu, Changxin 1 ; Zhang, Linlin 1 ; Liu, Jinli 1 ;

作者机构： 1.Hebei Acad Agr & Forestry Sci, Changli Inst Pomol, Changli 066600, Peoples R China

2.Massey Univ, Sch Agr & Environm, Private Bag 11222, Palmerston North, New Zealand

关键词： Biological control; Low temperature; Storage duration; Reproductive success; Offspring number; Sex ratio

期刊名称：EXPERIMENTAL AND APPLIED ACAROLOGY （ 影响因子：2.132； 五年影响因子：2.196 ）

ISSN： 0168-8162

年卷期： 2019 年 78 卷 3 期

页码：

收录情况： SCI

摘要： Pyemotes zhonghuajia Yu, Zhang and He is a newly discovered native ectoparasitic mite that efficiently controls stem borers in China. To provide a steady and sufficient supply, extend adult lifespan and synchronize field augmentative releases of P. zhonghuajia, we determined the optimal cold storage temperature and duration by storing 1-day-old mated females at 8, 10 and 12 degrees C for 10-90 days with a 10-day interval in the laboratory. We then recorded mite survival during storage and monitored the post-storage reproductive performance of mites at a control temperature of 25 degrees C. We found that all mites survived at 10 and 12 degrees C for different durations, but mortality occurred when mites were stored at 8 degrees C for >= 30 days with more than 70% of mites dead when the storage duration prolonged up to 50 days. The proportion of reproductive females was higher at 10 degrees C but decreased with the prolonged storage duration at all test temperatures. Storage temperature had no significant effect on the pre-reproductive period and offspring sex ratio, whereas prolonged storage induced longer pre-reproductive period and lower proportion of female offspring. The reproductive period increased with increasing storage temperature and with prolonged storage up to 50 and 60 days; however, the longer reproductive period did not directly translate into greater reproductive output. We found that compared with the control, mites stored at 10 degrees C for up to 30 days did not significantly reduce their survival, proportion of reproductive success and number and sex ratio of offspring, suggesting that 10 degrees C and <= 30 days were the optimal cold storage temperature and duration, respectively, for post-mass production storage before the field augmentative release of P. zhonghuajia.

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