土耳其斯坦叶螨的生殖潜能

The fecundity potential of Tetranychus turkestani Ugarov et Nikolski (Acari:Tetranychidae)

为了研究新疆农作物重要害螨土耳其斯坦叶螨Tetranychus turkestani Ugarovet Nikolski的暴发原因，在实验室条件下研究了土耳其斯坦叶螨在不同温度条件下的生活史、生殖力、实验种群生命表。结果表明：温度是影响土耳其斯坦叶螨发育、产卵的重要因素。从生命表参数分析，19—31℃范围内世代存活率达79．8％-100％。产雌率达83．3％～85．3％。20±1、25±1、30±1、34±1℃时净增殖率风分别为44．5793、57．0307、52．6785、57．6588。20±1、25±1、30±1、34±1℃时种群增长指数分别为27．03、44．50、43．13、26．59。种群倍增时间随着温度的上升而缩短，20±1℃为4．8799天，34±1℃为仅为2．3610天。研究结果表明土耳其斯坦叶螨世代短、生殖潜能大，在新疆棉田特殊的气候、生态和管理模式下易暴发成灾。

In order to study the factors that cause the outbreak of Tetranychus turkestani, an important pest mite in Xinjian, the life history, reproduction ability and life table of T. turkestani were studied under the different temperatures in the laboratory. It was showed that temperature is an important factor of the development and fecundity of T. turkestani. The generation survival rates of T. turkestani reached 79.80% -100% when temperature ranging 19℃ to 31℃. The net reproductive rate per generation of T. turkestani was 44.5793 at 20 ±1 ℃, 57. 0307 at 25 ± 1 ℃, 52.6785 at 30 ± 1 ℃ and 57. 6588 at 34 ± 1 ℃. The period of population double increasing （t） was shorten as the temperature increase, t = 4.8799 d at 20 ± 1 ℃, but only 2.3610 d at 34 ± 1 ℃. The higher fecundity potential and the shorter generation of T. turkestani are the main factors which cause its outbreak under the special climate, the cotton field ecosystems and the cultural management conditions in Xiniiang