Biological studies of the Oligonychus Iitchii (Trombidiformes:Tetranychidae) on four commercial litchi cultivars

文献类型： 外文期刊

第一作者： Yao, Qiong

作者： Yao, Qiong;Quan, Linfa;Xu, Haiming;Jia, Tao;Li, Wenjing;Chen, Bingxu

作者机构：

关键词： spider mite; behavior; development; fecundity; life table

期刊名称：FLORIDA ENTOMOLOGIST （ 影响因子：1.425； 五年影响因子：1.595 ）

ISSN： 0015-4040

年卷期： 2019 年 102 卷 2 期

页码：

收录情况： SCI

摘要： Litchi is one of the most important pillars of the fruit industry in Southeast Asia and mainland China. The litchi spider mite, Oligonychus Iitchii Lo & Ho (Prostigmata: Tetranychidae), is a major pest of litchi. To determine the influence of different litchi cultivars on the life cycle, fecundity, and longevity of O. Iitchii, life tables of O. Iitchii on 4 popular commercial litchi cultivars in China ('Baili,"Fezixiao,"Sanyuehong; and'Nuomicr) were constructed under laboratory conditions at 25 +/- 1 degrees C, 65 to 80% RH, and photoperiod of 14:10 h (L:D). Life stages of O. Iitchii consist of egg, larva, protonymph, deutonymph, and adult, with distinct body sizes and colors. The life table parameters were significantly influenced by litchi cultivars. Our results showed that the developmental time of immature O. Iitchii was significantly longer on Baili than on the other 3 litchi cultivars. The immature survival rates of O. Iitchii varied from 21.74% to 68.42%. Oligonychus Iitchii laid significantly more eggs on Nuomici (64.84 eggs per female) than on other cultivars. The population doubling time of O. Iitchii ranged from 4.56 to 22.42 d, and a significant varietal effect was seen. The mites feeding on Nuomici showed the lowest intrinsic rate of natural increase per d (r(m) = 0.14 female per female per d). In addition, the net reproductive rate (R-0) and finite rate of increase (lambda) of O. Iitchii had the highest value on Nuomici (22.86 female per female per generation, and 1.16 female per female per d, respectively). The comparison of r(m), R-0 and immature survival rate of O. Iitchii on host plants revealed that Nuomici is the most suitable cultivar, suggesting that Nuomici is more susceptible to the litchi spider mite than the other 3 litchi cultivars.

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