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棉叶螨(Tetranychus telarius L.)是我国农作物十一大病虫害之一。为使对它的预测预报能日益完善,以提高防治效果,作者曾在1957—1959年于苏联列宁格勒学习时,研究了不同棉叶螨种群的光周期反应,现报导如下。 一、试验材料和方法 试验材料采用苏联棉叶螨的五个地理种群:列宁格勒(北纬59°44′);克拉斯诺达尔(北纬44°53′);第比里斯(北纬41°43′);塔什干(北纬41°21′)和斯大林纳巴德(北纬37°50′)。为进一步确定所用各个地理种群的可靠性,除作了形态学上的鉴定外,还进行了种群间的杂交,都获得正常的后代。各地理种群分别在五个单独房间内进行隔离繁殖培养,食料为盆栽的-1品种棉花。 在低温实验室内用自动调节光照的恒温箱(±0.3℃)测定各地理种群的光周期反应,光源为20瓦的三支萤光灯。相对湿度为75—90％。每个处理有三个重复,每组供试叶螨为200头,卵孵化为幼虫时立即进行处理,为防上相互混杂,在所处理的花盆口周围涂上虫胶。棉苗主茎上裹脱脂棉加涂一层虫胶,以防止滞育个体通过棉茎进入土中。 除室内试验外,还在斯大林纳巴德进行了田间消长情况的观察调查,定期定株观察不同食料质量对滞育的影响,调查了老棉株、再生棉株、老甘草、再生甘草上滞育个体和非滞育个体的数量及其产卵量,与此同时,还
Tetranychus telarius is one of eleven major pests and diseases in China. In order to improve its prediction and forecasting to improve the control effect, the author studied the photoperiodic response of different cotton leaf mite populations when they studied in Leningrad, the Soviet Union from 1957 to 1959. The report is as follows. MATERIALS AND METHODS Materials Five populations of Soviet cotton spider mites were studied: Leningrad (59 ° 44’N), Krasnodar (44 ° 53’N), Tbilisi (41 ° 43’N Tashkent (41 ° 21’N) and Stalinabad (37 ° 50’N). In order to further determine the reliability of each geographical population used, in addition to the morphological identification, but also between the populations of hybrids, all get normal offspring. The geographical populations were isolated and cultured in five separate rooms, the food for potted -1 variety of cotton. The photoperiodic response of each geographic population was measured in a cryogenic laboratory using an automatically regulated incubator (± 0.3 ° C) with a light source of three lamps of 20 watts. Relative humidity of 75-90%. There were three replicates for each treatment, with 200 spider mites in each group. Eggs were treated immediately after they hatched as larvae, and shellac was sprayed around the flower pot openings to prevent them from becoming mixed with each other. Cotton seedling stem wrapped cotton wool coated with a layer of shellac to prevent diapause individuals through the cotton into the soil. In addition to laboratory tests, observations were made at Stalinabad to determine the effects of different foodstuffs on diapause. The effects of different dietary qualities on diapause were observed regularly. Investigations were made on the effects of old cotton plants, regenerated cotton plants, old licorice, and regenerated licorice The number of individuals and non-diapause individuals and their fecundity are also at the same time, also