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【目的】通过对新疆本地捕食螨双尾新小绥螨Neoseiulus bicaudus Wainstein的形态学特征观察及其对新疆农作物上两种重要害螨的捕食量测定,为该捕食螨的保护、研究、扩繁和释放提供理论基础。【方法】在实验室(26±1)℃,RH60%,16L︰8D条件下,借助显微成像系统观察其各个螨态形态特征及生物学习性;定量小室饲养技术对不同密度下对新疆两种重要害螨各螨态的捕食量进行研究。【结果】双尾新小绥螨有卵、幼螨、第一若螨、第二若螨和成螨5个螨态,嗜好阴暗条件,活动范围小,通过有性生殖进行繁殖,有多次交配行为,产卵方式为单产;单头双尾新小绥螨雌成螨每日对截形叶螨Tetranychus truncatus卵和幼螨的捕食量(106.8粒/日·雌和45.4头/日·雌)要显著大于土耳其斯坦叶螨Tetranychus turkestani(64.4粒/日·雌和39.4头/日·雌),而对两种叶螨的若螨和成螨捕食量无明显差异。【结论】本研究表明双尾新小绥螨对土耳其斯坦叶螨和截形叶螨的卵和幼螨的捕食较对若螨和成螨的效果好,对新疆害螨有一定控制能力。
【Objective】 Morphological characteristics of Neoseiulus bicaudus Wainstein, a native predatory mite in Xinjiang, and its predation of two important pests on crops in Xinjiang were studied in order to protect, study and propagate the predatory mite And release to provide the theoretical basis. 【Method】 Morphological characteristics and biological behavior of each mite state were observed under the conditions of 26 ± 1 ℃, RH60%, 16L: 8D in laboratory. The species of predatory mite predators were studied. 【Result】 The results showed that there were many eggs, young mites, the first nymphs, the second nymphs and the five mites in the mites. There were many dark and dark conditions, the range of activities was small, and there were many times through sexual reproduction Mating behavior and oviposition method were single-cropped. The predation amount of Tetranychus truncatus eggs and young larvae on the single-headed, two-tailed Newarius mites was 106.8 capsules / day and 45.4 days / day on average ) Was significantly larger than that of Tetranychus turkestani (64.4 seeds / day · female and 39.4 days / day · females), but there was no significant difference in the predation of nymphs and adult mites between the two spider mites. 【Conclusion】 The present study shows that the predation of Neospongs canis on the eggs and young mites of Tetranychus turkestani and Tetranychus urticae is more effective than that of nymphs and adult mites, and has some control over the pest mite in Xinjiang.