查询词典 aphid

Host alterations of the root aphid, Tetraneura nigriabdominalis, among four host plants ( Eleusine indica , Oryza sativa , Zea mays , and Sorghum bicolor ) were studied by comparing adult longevity, fecundity, and population parameters in the laboratory.

於实验室中，研究粗长毛禾根绵蚜 Tetraneura nigriabdominalis (Sasaki 在四种寄主植物(牛筋草 Eleusine indica 、水稻 Oryza sativa 、玉米 Zea mays 及高粱 Sorghum bicolor )转移对其成蚜寿命、繁殖率及族群介量之影响。

During the first 7-day period, 639 alates died from mycoses caused by several obligate aphid pathogens in the Entomophthorales, representing a primary infection rate of 27.2% among the air-trapped alates.

自2002年10月至2005年5月在杭州上空诱获桃蚜的迁飞性有翅蚜2351头，将其带回室内在(21±1)℃和12L：12D条件下单头饲养12d，其中639头在定殖后7d内发病死亡，初始感染率达27.2%。

To study the interaction between Eriosoma lanigerum and apple trees, olfactory response of the aphid to different kinds of apple branches was tested by Y-olfactometer and volatiles from the branches were extracted with HS and measured with GC-MS. The result showed that E.

为探讨苹果绵蚜与苹果树的互作关系，用Y形嗅觉仪测试该虫对不同苹果品种枝条的嗅觉反应，顶空萃取枝条挥发物，并进行GC-MS分析。

Temperature also affected, to some extent, the trend of the abundance of mycetocytes following the development of aphids. The abundance of mycetocytes increased with the development from nymph to adult before larviposition in the aphid at 15℃, 20℃ and 25℃, but culminated at the 3rd instar and thereafter declined at higher temperatures (30℃ and 35℃).

温度对菌胞数量随宿主发育到产仔前的变化趋势有不同程度的影响，在较低温度（15℃、20℃和25℃）下，菌胞数量随虫体发育显著增加；但在高温（30℃和35℃）下，蚜虫体内菌胞数逐渐增加直到3龄达到最高，然后略有下降(30℃)或显著下降(35℃)。

CO〓 and soil water affected aphid population indirectly through the direct effects on the wheat characteristics. The population increase was due to both high adult fecundity and shortened nymphal period.

3在700ppm范围内CO〓对禾谷缢管蚜的直接影响很小，CO〓和土壤水分对禾谷缢管蚜种群的影响主要来源于间接影响，即通过影响小麦的理化性质进而影响蚜虫的个体行为和种群大小。

The black bean aphid, Aphis fabae Scopoli, is a worldwide pest of economic crops with polyphagous habits.

黑豆蚜Aphis fabae Scopli广布全世界，多食性，是农业生产上的重要害虫。

The data obtained from the virus loss experiments showed that the virus retain ability were decreased with long delay duration in the air and viruliferous aphid lost the virus particles by intracellular penetration.

病毒丢失实验结果表明，蚜虫在空气中&滞留&时，持毒能力会不断下降，同时在植物上进行试食穿刺时，病毒主要丢失在植物细胞内。

Blackish aphid that infests e.g. beans and sugar beets.

在豆类和甜菜上滋生的略带黑色的蚜虫。

The results showed that the wolly apple aphid distributed in Linfen, Yuncheng ,Changzhi and Jinzhong Prefecture.

通过对4区9地的调查结果表明：苹果绵蚜已经入侵到临汾市、运城市、长治市和晋中市。

Aiming at the biological character,morphological character and harm regulation of Woolly apple aphid,the article summarizes four effective measures to control harm occurrence,and this provided references for apple production.

通过分析苹果绵蚜的生物学特性、形态特性和危害规律，总结出4条有效防控措施，为苹果生产提供了借鉴。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。