查询词典 aphid

The results of field trial showed that 4 pesticides gave good control effect against wheat aphid ,Macrosiphum avenaeF.

田间试验结果表明，四种杀虫剂对小麦蚜虫均有较好的防效。

Although the reasonable biodiversity in wheat fields could control the population of wheat aphid effectively, but the spatial distribution did not change.

麦田合理生物多样性可以有效控制麦长管蚜种群的增长，但并不能改变其种群格局的变化趋势。

With the improvement of irrigation conditions on cornfield and changes of agricultural ecosystem, wheat aphid cause more losses than ever in wheat productivity.

近年来，随着麦田水肥条件的改善和农业生态环境的变化，麦蚜虫害日趋加重。

According to the method of multiobjectives decision-making and optimization,It was suggested that Triticum monococcum is a better source of wheat which is resistant to aphid."Qianjinzao" is a sensitive species.

通过多目标综合决策分析，认为1粒小麦和材料98-10-9是比较好的抗性种质资源，生产上广泛推广的千斤早是感蚜的品种。

From the prosperous beginning stage to the peak age of wheat aphid number, its controlling effect was

在小麦发生始盛期至高峰期，防治效果达93.14％～99.52％。

The results indicate that aphids number ratio have distinct difference among five wheat varieties, and the wheat varieties resistance to aphid are consistent with those in seedling.

以在感蚜的小麦品种上繁殖10代以上的麦长管蚜作为虫源，在5个不同抗性的品种上饲养5日的时间，而后测定各品种上麦长管蚜羧酸酯酶和谷胱苷肽-S-转移酶的活性和酶体系的蛋白含量。

The spectrum features on wheat canopy were studied by measuring and analyzing the reflectance and differential spectrums at 5 infested levels by wheat aphid.

通过对田间不同程度麦蚜危害的小麦冠层反射光谱测量，研究了各波段反射光谱的变异特征，并对光谱反射曲线进行微分分析。

Methods The method of the residual film in glass tube with 3 h exposure to insecticides was employed for determining toxicity of insecticides to both wheat aphid species, which were originally collected from different provinces of China during 2005-2007 and reared on wheat seedlings in the laboratory for more than 30 generations.

方法］从田间采集麦蚜在实验室内饲养30代以上，利用玻璃管药膜法测定其对杀虫剂的敏感度，每条毒力基线为2次以上独立测定数据合并后的计算结果。

With the increase of infestation by wheat aphid, the percent reflectance on wheat canopy decreased at green, red and near infrared bands, while at near infrared band the decrease was evident.

结果表明：在麦蚜危害的初期，近红外反射率明显降低，即陡坡效应受到明显的削弱，随着麦蚜危害程度加重，小麦冠层的反射率在不同波段有明显下降，尤其在近红外区下降更为显著。

Incidences of Russian wheat aphid, Diuraphis noxia, in relation to wheat planting date were investigated in Ili and Tacheng, Xinjiang Uygur Autonomous Ragion.

新疆伊犁和塔城冬、春麦田的麦双尾蚜Diuraphis noxia 有虫株率和百株蚜量，与小麦播种时间密切相关。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。