Abstract：
The date palm mite, Oligonychus afrasiaticus (McGregor) (Acari: Tetranychidae), is a serious pest of dates in the Middle East and North Africa, inflicting severe economic damage if not controlled early. As predaceous mites are known to be potential biocontrol agents against several pests, so predation capacity, life table, reproduction, and survival of Amblyseius swirskii Athias-Henriot and Neoseiulus cucumeris (Oudemans) (Acari: Phytoseiidae), collected from date palm farms in Qassim Saudi Arabia, were studied under laboratory conditions (25 °C, 30 °C, 35 °C and 50 ± 5% RH) against all motile stages of O. afrasiaticus. For both predators, mean developmental time, oviposition period, and longevity were inversely related to temperature from 25 to 35 °C. Various parameters were studied for A. swirskii and N. cucumeris at 25 °C, 30 °C and 35 °C, i.e. the female developmental time, 9.37, 7.29, 5.56, and 10.67, 8.38, 6.45 d; oviposition period, 19.77, 16.18, 13.94 and 15.90, 13.84, 10.64 d; longevity, 29.39, 24.79, 20.64 and 25.42, 21.94, 17.39 d; fecundity, 31.91, 37.10, 42.16 and 21.75, 26.84, 30.56 eggs per female, respectively. The maximum daily predation rate for both the predators was recorded at 35 °C during the oviposition period. The total predation of A. swirskii and N. cucumeris female was 370.86, 387.54, 405.83, 232.14, 263.32, 248.85 preys at 25 °C, 30 °C and 35 °C respectively. The maximum reproduction rate of A. swirskii and N. cucumeris (3.02, 2.87 eggs/♀/day) was recorded at 35 °C while the minimum (2.00, 1.36 eggs/♀/day) was recorded at 25 °C. The life table parameters were estimated as net reproductive rate (Ro) 21.68, 25.94, 29.52 and 18.95, 20.25, 22.78; the mean generation time (T) 24.92, 21.82, 18.24 and 26.30, 23.60, 20.56 d; the intrinsic rate of increase (rm) 0.181, 0.232, 0.248 and 0.170, 0.185, 0.196; the finite rate of increase (λ) 1.365, 1.551, 1.706 and 1.126, 1.324, 1.428 for A. swirskii and N. cucumeris at 25 °C, 30 °C and 35 °C respectively. The results of this study suggested that the two phytoseiid species are promising biological control agents of O. afrasiaticus at a wide range of temperatures.
摘要：
枣树螨,Afrasiaticus(McGregor)(Acari:Tetranychidae),是中东和北非严重的红枣害虫，如果不及早控制，会造成严重的经济损失。由于已知食草螨是针对几种害虫的潜在生物防治剂，所以捕食能力，生命表,繁殖，以及Athias-Henriot和Neoseiuluscucumeris（Oudemans）（Acari：Phytoseiidae）的生存，从沙特阿拉伯Qassim的椰枣农场收集，在实验室条件下进行了研究(25°C，30°C,35°C和50±5％RH）对抗O.Afrasiatus的所有活动阶段。对于两个捕食者来说，平均发育时间，产卵期,和寿命与25至35°C的温度成反比。在25°C下研究了A.swirskii和N.cucumeris的各种参数，30°C和35°C，即女性发育时间，9.37、7.29、5.56和10.67、8.38、6.45d；产卵期，19.77、16.18、13.94和15.90、13.84、10.64天；长寿，29.39、24.79、20.64和25.42、21.94、17.39d；繁殖力，每个雌性31.91、37.10、42.16和21.75、26.84、30.56个卵，分别。在产卵期间，在35°C下记录了两个捕食者的最大每日捕食率。在25°C下，旋流A和黄瓜雌性的总捕食量为370.86、387.54、405.83、232.14、263.32、248.85，分别为30°C和35°C。在35°C下记录最大繁殖率（3.02，2.87个鸡蛋/‰/天），而在25°C下记录最小繁殖率（2.00，1.36个鸡蛋/‰/天）。寿命表参数被估计为净繁殖率（Ro）21.68、25.94、29.52和18.95、20.25、22.78；平均生成时间（T）24.92、21.82、18.24和26.30、23.60、20.56d；内在增加率（rm）0.181、0.232、0.248和0.170、0.185、0.196；黄瓜1.428的有限增加率。分别为30°C和35°C。这项研究的结果表明，这两种植物是很有前途的生物防治剂。在很宽的温度范围内的Afrasiaticus。
