麦长管蚜

Indoor research indicates that there are remarkable differences in non-preference, antibiosis and tolerance to M. avenae, respectively, among 27 cultivars or lines of spring wheat seedlings, but no remarkable difference in the total resistance.

室内研究表明，在不选择性、抗生性和耐害性方面，27个供试小麦品种幼苗对麦长管蚜的抗性存在显著差异，但总的抗性不存在显著差异。

It was difficult for the aphid to take off at 8℃ and the flight time was shortened significantly.

在温度18℃时，麦长管蚜的平均飞行时间、飞行距离最大分别为3.101 h、3.676 km。

The english grain aphid Macrosiphum aven is one of the most important agricultural pests, which results in serious wheat lost in China.

麦长管蚜Macrosiphum avenae是我国重要的农业害虫，给我国的小麦生产造成严重的威胁。

Macrosiphum avenae (Homoptera:Aphididae) is an important pest of wheat in the world.

麦长管蚜属同翅目、蚜科，是世界性小麦害虫。

An investigation was made in winter wheat fields to study the effects of applying wheat synomones methyl salicylate and sulcatone (6-methy-5-hepten-2-one) on the dynamic changes of Macrosiphum avenae and its natural enemies Harmonia axyridis and Aphidius avenae.

研究了在田间使用小麦互益素－水杨酸甲酯和6-甲基－5-庚烯－2-酮对麦长管蚜及其主要天敌－异色瓢虫和燕麦蚜茧蜂的影响。

The analyses show that the conformation and volatile of wheat have few influence on the behavior of autoeciousness.

说明小麦的外在形态和小麦植株的挥发物对麦长管蚜选择寄主的行为影响较小。

When the aphids were feeding on Ww2730 seedlings, the time to 1st probing was delayed compared to those on Xiaoyan22 and Batis, searching was interrupted before 1st probing, and 1st probing was shorter than that on Xiaoyan22 and Batis significantly. Duration of pd Ⅱ-1 on Ww2730 and Xiaoyan22 was much longer than that on Batis. Duration of pd in C waveforms on Ww2730 was longer than that on Xiaoyan22 and Batis remarkedly. Times and duration of G waveform on Ww2730 were more and longer. Times of spot G waveform on Batis were more than on Ww2730 significantly, but the duration was shorter than those on Xiaoyan22 and Ww2730. Total time of E1 waveform, max longest duration of E1 fractions and mean duration time of E1 fractions following E2 wavefrom on Xiaoyan22 and Batis were all longer than on Ww2730 statistically. There were no differenences among mean durations of 1st E1 wavefrom on three varieties, but mean durations of other E1 waveforms on Ww2730 and Xiaoyan22 were shorter than those on Batis. The other waveform parameters, include times and durations of F and E2 were all not different on three wheat varieties.It is suggested that the resistance mechanism of wheat variety Ww2730 to S.

麦长管蚜在品种Ww2730上口针开始接触叶面时间显著晚于小偃22和Batis，第1次持续刺探前的刺探次数显著多于小偃22和Batis，开始刺入叶面后第1次刺探的持续时间极显著短于小偃22和Batis；在Ww2730和小偃22上的PdⅡ-1的平均时间显著长于Batis；Ww2730上C波阶段2个Pd波间的间隔平均时间显著大于另外2个品种；在Ww2730木质部取食的次数和时间显著大于其它2个品种；Batis上的点G波的次数极显著地高于Ww2730，而平均持续时间极显著短于小偃22和Ww2730；在Batis和小偃22上E1波的总时间，E1波的最大值、跟随E2波的E1波的平均时间均显著大于Ww2730；3个品种间第1次E1波持续的时间差异不显著，但Ww2730和小偃22上其它E1波持续的时间极显著少于Batis；3个品种上其它波形参数，包括F波的次数和总时间、E2波的次数和总时间没有差异。

Under controlled conditions in artificial bioclimatic chambers, adult aphids of red and green biotypes of Sitobion avenae were placed on two wheat varieties ('Astron' and 'Xiaoyan-22') and treated under 30W lamp of UV\|B for different durations respectively.

研究紫外辐射对红和绿体色型麦长管蚜的生物学特征的影响，探求紫外辐射在蚜虫种下体色分化及遗传中的作用。

The powerful heterogenic for population differentiation and genetic variation strength its adaptability to variable environment, M.avenae adapted to the nature condition and it also resulted in the heredity variation of M.avenae populations.

在环境条件和化学农药、小麦品种等人为条件的强大选择压力下，麦长管蚜种群发生了较大的遗传变异。

The results from systematic observation from 2006 through 2008, demonstrated that meteorological factors such as wind and rain were essential for population development of english grain aphid.

经过2006～2008年的系统观测结果表明，风雨气象因素对麦长管蚜种群发展具有显著的影响作用，是突出的关键制约因子。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。