叶蝉

RESULTS It's significant level of the differences of Stilpnotia candida, geometrid, leaves' number between no-light area and light-district area. Jiaduo multi-frequency vibration-killing lamps has a obvious effect to control pests in the tea garden, especially for Stilpnotia candida, geometrid and leaf which has a more prominent role in the booby traps, the difference between lights district with no-lights district is up to a very significant level, But it's limitation to control leafhopper.

有灯区和无灯区中毒蛾、尺蠖、叶甲的数量差异达到了极显著水平；频振式杀虫灯对茶园害虫的防治效果明显，特别是对毒蛾、尺蠖和叶甲类的诱杀作用较突出，对它们的防效有灯区与无灯区间差异达到了极显著水平，但是对叶蝉的防治还是有一定的局限。

The dominant insect pests were grasshoppers, leafhoppers, and planthopper on poorly-managed lawns, but Laodelphgax striatellus, Cicadella viridis, Agrotis ypsilon, Rutelidae on well-managed lawns.

粗放管理草坪主要优势害虫有蝗虫类、叶蝉类和飞虱类；而精细管理草坪害虫主要有灰飞虱、大青叶蝉、小地老虎和丽金龟科。

TWO NEW SPECIES OF THE GENUS MIMOTETTIX FROM CHINA HEMIPTERA, CICADELLIDAE, EUSCELINAE

薄如轻纱的蝇翅。2。中国斑翅叶蝉属二新种记述半翅目，叶蝉科，殃叶蝉亚科

The results showed: after local leafhoppers were inoculated with RDV- SX isolate, RDV- LQ isolate, the vector viruliferous rates were similar as 84 % and 75% respectively,but the rice incidence rates were dissimilar as 28.1% and 2.8 % respectively.

研究表明：用本地黑尾叶蝉分别接种RDV本地分离物和云南分离物，斑点杂交显示介体带毒率相似，分别为84%、75%，但生物学接种结果差异相当大，分别为28.1%，3.8%，另外斑点杂交显示云南病区的黑尾叶蝉带毒率为88%，说明介体叶蝉的传毒能力具有地域性，介体叶蝉带毒率与传毒能力也存在一定差异。

Related to the leafhoppers and spittlebugs but rarely damages cultivated plants.

与叶蝉和沫蝉有关但对栽种的植物很少破坏。

Our study suggests that this simple and convenient DC-EPG technique might have great potential as a reliable tool to predict the resistance of tea cultivars to the tea leafhoppers.

该顺序与田间查得的9个品种茶树上假眼小绿叶蝉种群密度由小到大的顺序一致，表明DC-EPG方法简捷、可信度高，可作为检测茶树品种对叶蝉抗性的有效手段之一。

The nine tested tea cultivars were categorized into three groups by cluster analysis according to the number of probes per insect, waveform durations, or duration per probe including various waveforms on different tea cultivars. Waveforms S, E and F correlated to the main feeding activity of the leafhoppers and may provide valuable information on predicting the resistance levels of the tea plants to the leaThopper. The resistance level of the nine tea cultivars to the leafhopper was ranked based on the durations of waveform S, E and F, as well as the duration every probe including various waveforms.

以该叶蝉在不同品种茶树上的平均刺探次数和各波形平均持续时间为指标，或者以其在不同品种茶树上含有各波形的单次刺探平均持续时间为指标，分别进行聚类分析，均将9个品种分为3个不同的组。S、E和F波对应着假眼小绿叶蝉在茶树上的主要取食活动，可能与茶树抗假眼小绿叶蝉的取食密切相关。

Plant lice; whiteflies; cicadas; leafhoppers; plant_hoppers; scale insects and mealybugs; spittle insects.

蚜虫；粉虱；蝉；叶蝉；鳞虫和水蜡虫；沫蝉。

However,their effects upon the rice leafhopper,Empoasca subrufa Melichar,remain to be carefully investigated.Experimentswith adults were conducted both in the laboratory and in the field.The resultsmay be summerized as follows:1.Spraying with 25% DDT emulsion in 200-300 parts of water killed over90% of the leafhoppers,whereas in 400 parts of water,it gave an unstable kill-ing effect ranging from 75% to 90%.Dus...

田间使用 DDT 防治白翅叶蝉的残效期约为10—12天。666单独用来防治白翅叶蝉效果甚差，但与 DDT 混合使用有增效作用，残效期与单独使用 DDT 相似；二者混用是最合理的施用方式，可以节省 DDT 用药量，减低药费，同时对多种稻虫可收综合防治之效。25%DDT 乳剂和6%可湿性666按1∶1∶400及1∶1∶600混用，其毒效相当于单用 DDT 1∶200及1∶300者；用1∶1∶500喷射效果比单用 DDT 1∶300者还略高；5% DDT 粉剂和0.5%666粉剂按1∶1混用，其毒效也和单用5% DDT 粉剂相接近。

The results indicated that: compared with mono-cropping, the mean densities of rice stem borers, leaf roller, rice hoppers and leafhoppers in scale rice-duck farming were decreased by 54.4%, 48.8%, 73.6% and 96.1% respectively, and the rate of diseased plant of sheath blight and rice blast in IF were decreased by 78.9% and 48.5% respectively. Compared with the conventional rice-duck farming, the average densities of rice stem borer, rice leaf roller, rice hoppers and leafhoppers in IF was reduced by 18.2%, 9.5%, 7.0% and 0.82% respectively, and the rate of diseased plant of sheath blight in IF were decreased by 35.5%, unfortunately that of rice blast in IF was increased by 8.0%.

结果表明：规模稻鸭生态种养水稻二化螟、稻纵卷叶螟、稻飞虱和稻叶蝉平均虫量较水稻单一种植分别下降54.4%，48.8%，73.6%和96.1%，纹枯病和稻瘟病病株率分别降低78.9%和48.5%；较常规稻鸭生态种养水稻二化螟、稻纵卷叶螟、稻飞虱和稻叶蝉量分别下降18.2%，9.5%，7.0%和0.82%，纹枯病病株率降低35.5%，稻瘟病病株率升高8.0%。

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。