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MethodFive kinds of tested pesticides were prepared into medical solutions with different dilution multiple to make an indoor efficacy experiment on A.disperses ovum.

方法将5种供试农药配制成不同稀释倍数的药液,对螺旋粉虱卵进行室内药效试验。

Pear leaf psylla psylla pyrisuga Forster were fed on Pyrus pyriforis Nakai leaves at 20-30℃and at 60-90% of relative humidity with 25℃. The results showed that the optimuM temperature for the development of the eggs,nymphs and the whole generation was shown to range from 20. 0-22.5℃, 22.5-25℃. and 22. 5-25℃, respectively. The optimun temperature for the reproduction of the female adults was 25℃.

以砂梨叶作饲料,研究了20、 22.5、 25、 30℃四种温度和在25℃条件下,60%、70%、80%、90%四种相对湿度对梨木虱Psylla pyrisugaForster生长发育和繁殖的影响,结果表明梨木虱卵期、若虫期和全世代生长发育最适温度分别为20-22.5℃,22.5,25℃和22.5-25℃,雌成虫繁殖最适温为25℃。

Eight methods were used to analyze the spatial pattern of Bemisia tabaci eggs on the Ligustrum lucidum. The results indicated that the pattern was aggregated distribution and the basic component of distribution was colony.

8种方法用以分析烟粉虱卵在女贞上的空间分布型,结果表明:烟粉虱卵在大叶女贞上呈聚集分布,分布的基本成分是个体群。

Eight methods were used to analyze the spatial pattern of Bemisia tabaci eggs on the Ligustrum lucidum.The results indicated that the pattern was aggregated distribution and the basic component of distribution was colony.

8种方法用以分析烟粉虱卵在女贞上的空间分布型,结果表明烟粉虱卵在大叶女贞上呈聚集分布,分布的基本成分是个体群。

The research aimed to screen out the medicament with good ovicidal activity to Aleurodicus disperses ovum.

筛选对螺旋粉虱卵具有良好杀卵活性的药剂。

In order to maintain a lice free environment any child with any nits or lice will be sent home.

为了维持无虱的学习环境,任何有虱子或虱卵的学童必须离校回家。

The seasonal pattern of parasitism of the white-backed planthopper, Sogatella furcifera, was investigated in a subtropical double cropping of rice ecosystem in hilly region Jinghua-Quzhou Basin, Zhejiang, China.

在亚热带浙江金衢盆地的丘陵双季水稻田的早、晚稻期间研究了白背飞虱的被寄生和被捕食作用下的存活率。早、晚稻白背飞虱卵被缨小蜂寄生率分别为 1 1 %和 1 6 %,被捕食及未知因子死亡率分别为 2 3%和 1 6 %。

In addition to the direct transmission between plant and whitefly, geminiviruses can also be transmitted through mating and oviposition among whiteflies.

双生病毒除了在植物与粉虱之间直接传播外,还可通过烟粉虱交配及经卵携带的途径在烟粉虱个体和代别间进行传播。

Based on Iwao's method, the formula of optimum theortical sampling number was established. By using methods for variance analysis, the number of B. tabaci eggs showed little difference on the upper, middle, and lower canopy of L.

应用Iwao的抽样模型,建立了烟粉虱卵的田间理论抽样数公式方差分析表明,烟粉虱卵在女贞树冠上层、中层、下层的分布数量差异不显著。

Based on Iwao's method, the formula of optimum theortical sampling number was established. By using methods for variance analysis, the number of B. tabaci eggs showed little difference on the upper, middle, and lower canopy of L.

应用Iwao的抽样模型,建立了烟粉虱卵的田间理论抽样数公式方差分析表明,烟粉虱卵在女贞树冠上层、中层、下层的分布数童差异不显著。

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