The small brown rice planthopper is an injurious insect on food crop of Ningxia.
灰飞虱是宁夏粮食作物上的一大害虫。
Insect bioassay results showed that these homozygous lines had significant inhibition to brown planthopper.
抗虫鉴定结果发现这些纯系对褐飞虱具有明显的抑制作用。
The disastrous rule of rice planthopper occurrence in Jianghuai rice region and its forecast techniques were studied.
研究了江淮稻区白背飞虱和褐飞虱的成灾规律，以及稻飞虱灾变的短、期预测技术。
After the whole typhoon landed, the southwest airflow rebuilt, and a mass rice brown planthopper migrated to the north.
台风整体登陆后，西南气流的再次建立，造成褐飞虱的大量北迁。
Abstract: The disastrous rule of rice planthopper occurrence in Jianghuai rice region and its forecast techniques were studied.
文摘：研究了江淮稻区白背飞虱和褐飞虱的成灾规律，以及稻飞虱灾变的短、期预测技术。
Thus, EMS analysis clearly distinguished two types of resistant plants with different resistant factors against planthopper feeding.
因此，可以清楚地识别两类具有不同抑制取食抗性因子的抗性植物。
The metabolic resistance of the brown planthopper, Nilaparvata lugens, to buprofezin and metamidophos was investigated in this article.
说明褐飞虱对这两种药剂的代谢抗性机制存在差异。
The occurrence rules of rice planthopper in rice field with cultural crab was ascertained through systemic investigation and field census.
通过系统调查和大田普查相结合的方法，研究明确了养蟹稻田稻飞虱的发生规律。
The reflectance of rice plant damaged by the brown planthopper(BPH, Nilaparvata lugens) was measured using an ASD handheld spectroradiometer.
利用手持式光谱仪测定了褐飞虱为害后稻株的光谱反射率。
White-backed planthopper has the characterizes of early migrating, quick rising number and severe demage at earlier and middle stages of early season rice.
白背飞虱在早稻中有迁入早、虫口上升快、数量大 ，在水稻前、中期为害严重等特点。
Fig. 4 Effects of soil biological factor (non-sterilized vs. sterilized) and fertilization management (chemical vs. organic fertilizer) on planthopper mass.
图4土壤生物因素(对照和灭活)及施肥因素(化肥和有机肥)对褐飞虱生物量的影响。
The community dynamics of egg parasitoids that could parasitize the brown planthopper in non rice habitats such as bunds and roadside vegetation were studied.
寄主卵、寄主植物和栖息生境对卵寄生蜂的性比、体形大小和发育历期有着明显的影响。
The others such as previous crops, sowing way for maize, cropping system and the climate were indirect factors, which affected the sowing date or amount of planthopper.
前茬作物、播种方式、耕作制度和气候条件等都通过影响玉米的播期或灰飞虱的发生数量来间接影响当地或当年病害发生的轻重。
There were obvious differences on math-morphological feature from images of the Whitebacked rice planthopper fed on the 4 rice varieties, besides the area of posterior wing.
各品种上的白背飞虱的数学形态特征，除后翅面积无显著差异外，其它均有一定的差异。
It is suggested that virulence of rice brown planthopper was variable and the character of variety resistant or susceptible to insect was the exterior factor of virulent shift.
这表明褐飞虱的致害性是可变异的，水稻品种抗、感虫特性是其转化的诱因。
The invention discloses a compound composition for preventing and treating rice planthopper, relating to biodiesel cream and suspending agent containing pymetrozine and thiamethoxam.
本发明公开了一种防治稻飞虱的复配组合物，涉及含有吡蚜酮和噻虫嗪的生物柴油乳油和悬浮剂。
The virulence characteristics of brown planthopper, Nilaparvata lugens Stal, from paddy field population and greenhouse population collected in late rice field last year was compared.
比较研究了当年采自田间的褐飞虱种群与上一年虫源在室内越冬繁殖种群对不同抗虫品种的致害性差异。
The virulence characteristics of brown planthopper, Nilaparvata lugens Stal, from paddy field population and greenhouse population collected in late rice field last year was compared.
比较研究了当年采自田间的褐飞虱种群与上一年虫源在室内越冬繁殖种群对不同抗虫品种的致害性差异。
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