您要查找的是不是：
- Impacts of three insecticides on wheat aphids and their natural enemies in wheat field. 三种杀虫剂对麦田蚜虫和天敌的影响。
- The time and space niche breadths of wheat aphids and their natural enemies were estimated during the middle and late growing stage of wheat. 摘要调查分析了麦田中后期2种麦蚜及其天敌的时间和空间生态位。
- The natural enemy resources are rich in Huanxian County,Ganshu Province.Among them, more than 30 species are dominant natural enemies of wheat aphids. 小麦蚜虫天敌资源丰富，其优势天敌在甘肃环县有30余种。
- In the paper, the feasibility and importance of further studies on the olfaction signal transduction of wheat aphids were discussed. 文章还就麦蚜嗅觉信号转导途径研究的可行性及意义进行了讨论。
- This research provided theoretic foundation to further monitor winter wheat aphids and powdery mildew diseases at large scale using airborne and airspace remote sensing data. 该研究为今后通过航天、航空遥感大面积监测冬小麦麦蚜、白粉病提供了理论依据。
- The control insecticide of 40% omethoate EC displayed poor field control efficacy, suggesting that wheat aphids had produced resistance to this insecticide. 对照药剂40%25氧乐果乳油的田间防效较差，麦蚜已对其产生了较高的抗性。
- Ephedrus sp. had greater control effect on wheat aphid than that of ladybirds in time dimension, while ladybirds revealed better control effect in spatial dimension. 蚜茧蜂对麦蚜的控制在时间维上比瓢虫占优势，瓢虫对麦蚜的控制作用在空间维上占优势。
- A high penetrating 2.5% WP formulation of imidacloprid reached 95% efficiency to control wheat aphids and reduced 50% dosage of active ingredient to campare with the application of traditional WP formulation. 高渗吡虫啉渗透、润湿性强，每公顷用有效成分6?3克，对麦蚜防效达95%25以上，用量比普通吡虫啉减少50%25以上，而防效却相当，且持效期明显地优于氧乐果。
- The niche breadths of natural enemies of the wheat aphids in wheat, barley and oat fields in Tacheng and Ili, Xinjiang Uygur Autonomous Region were estimated on the basis of investigation in 1990. 利用生态位理论，对新疆塔城、伊犁两地区麦田麦蚜主要天敌类群瓢虫类、食蚜蝇类、斑腹蝇类、蚜茧蜂类和蚜小蜂类的生态位宽度和重叠度进行了计算和分析。
- The development of gene flow GIS of wheat aphids 麦蚜基因流地理信息系统的研制与开发
- A method for mass culture of wheat aphids 一种室内饲养麦蚜的方法
- This strain of wheat can grow during a cold spring. 这种小麦可以在寒冷的春天生长。
- Efficacy of a carbamate insecticide Mieyawei to the wheat aphids 氨基甲酸酯类杀虫剂灭蚜威对麦蚜的防治效果
- We have had the biggest wheat crop ever this year. 今年我们的小麦收获量是有史以来最好的。
- He is always confusing wheat with leek. 他对麦苗和韭菜总是辨别不清。
- Effects of wheat aphid on spectrum reflectance of the wheat canopy 麦蚜对小麦冠层光谱特性的影响研究
- The hot weather is bringing the wheat on nicely. 因天气热小麦长势良好。
- Progress on the study of wheat resistance to wheat aphid 小麦抗蚜研究新进展
- Fields of wheat are undulating in the breeze. 在微风中起伏着一片麦浪。
- Keywords imidacloprid;pirimicard;wheat aphid;seven spot ladybird.; 吡虫啉;抗蚜威;小麦蚜虫;七星瓢虫成虫;
