稻飞虱是我国水稻生产中的主要害虫，近年来云南省稻飞虱大发生，表现出始见期提前，发生量增大，主峰期日虫量大且出现峰次多，迁入虫量大，种群增长迅速，发生区域广，为害面积大，危害严重且持续时间长。师宗地处滇东北高原区向滇东南低山与河谷的过渡地带，境内形成西南-东北和东南-西北走向的廊道，是白背飞虱从境外入滇北上直进黔川渝的主要通道。从地形地貌、地理位置、受季风影响、水稻种植和稻飞虱迁入量上，师宗都是滇东南最有代表性的地区，而对师宗的稻飞虱发生动态的研究对云南乃至全国的稻飞虱的预测防治都有重要意义。 本文对云南省师宗县近10年来的稻飞虱灯诱数据进行比较分析，发现师宗县近10年来白背飞虱灯下始见期提前，褐飞虱灯下始见期也有所提前。峰次越多，单日虫峰量越大的年份灯诱虫量总数往往越大。2013年对师宗县系统田进行田间调查，师宗县白背飞虱常年可发生4-5代，长翅型成虫4月中旬始见迁入，当地水稻3月底育秧，5月中旬移栽。迁入代后第一代为主害代，危害高峰期为水稻的分蘖期。师宗白背飞虱发生量远大于褐飞虱，主要在水稻的分蘖期到拔节期发生，对水稻危害最重。而褐飞虱主要在水稻的灌浆和黄熟期发生，且发生量远小于白背飞虱，对当地水稻危害较小。本文对三个水稻品种（明两优529、丰优香占、云恢290）各生育期白背飞虱百丛虫量进行方差分析比较三个水稻品种对白背飞虱种群的影响，结果显示这三个品种上的白背飞虱量显著性均大于0.05，品种间的感虫能力无差异，即三个品种对白背飞虱种群影响无差异。本文比较了吡虫啉、噻嗪酮、噻虫嗪、毒死蜱和吡蚜酮这五种杀虫剂对白背飞虱的防治效果，本研究表明：吡虫啉在施药后第30天和第35天两次调查时校正防效分别为-2%和-18%，说明在这期间虫量有所回升，持效性不佳；噻嗪酮在施药后第15天到施药后第35天之间几次调查中校正防效都为负值，防治效果最差；噻虫嗪对白背飞虱的防效也不好，在施药后第20天、第30天、第35天校正防效分别为-66%、-124%和-26%。这三种药剂喷施的田间中期都有虫量回增，因此一次施药效果并不好，应进行二次施药。毒死蜱和吡蚜酮持效性较强，防治效果较好。

The rice planthoppers are major pests to rice planting in our country.In the past few years the rice planthoppers happened seriously in Yunnan province.For example the first time seeing the rice planthopper ahead of time,the number of rice planthopper become more and more,in the main days of rice planthopper migrate the number of planthopper is big and it shows many times up with big number of rice planthopper migrate,population grows fast,wide area occurred,the damage is often widespread,serious damage often last for a long time.Shizong is located in northeast Yunnan region des plateaux transition to a low hills and valleys of southeastern Yunnan Area.There are from southwest to northeast direction and southeast to northwest direction corridor.It is the main passageway for white-backed planthopper(Sogatella furcifera,WBPH) migrate in Yunnan from outside and get to GuiZhou,SiChuan,ChongQing in the north. In view of the topography,geographical location,the influence of the monsoon,rice cultivation and the amount of rice planthopper migrate in,Shizong is the most representative area of southeastern Yunnan Region.Study the population dynamics of rice planthopper is very important to the forcasting and prevention of rice planthopper of Yunnan province,even our country. Through compare and analysis the light trapping data of rice planthopper in Shizong of YunNan province in recent ten years,I find that the first time seeing the White-backed Planthopper ahead of time in recent ten years.The results also could be found from the data of Brown Planthopper. When the frequensy of immigration peak were more,the light-trap catches of singele immigration peak were bigger,the light-trap catches would be bigger. Through systematic investigation in Shizong in 2013,the research find that there are 4-5generations of WBPH every year.The white-backed planthopper first seeing time of immigrate in Shizong in mid April.The local farmer raise rice seedlings in the end of March,transplant rice in the mid of May.The first generation after immigrate generation are the major damage generation.The main damage stage are rice tillering stage. The amount of WBPH are more than the amount of BPH.The white-backed planthopper happening mainly from the stage of tillering period to jointing stage.It damage rice most seriously.The brown planthopper happening mainly at filling stage and yellow ripe stage.The number of BPH are far less than WBPH.The damage caused by BPH are also small. Through analysis of variance on data of the number of WBPH to compare the three rice varieties(Ming Liang You529,Feng You Xiang Zhan,Yun Hui 290). The result showed that the significant difference between the number of WBPH on the three rice varieties along the growing periods are all bigger than 0.05.There are no difference with the three rice varieties in the ability of tolerance of WBPH. The reserch compared the control effect on WBPH along imidacloprid, buprofezin, thiamethoxam, chlorpyriphos and pymetrozine.The corrected efficacy of imidacloprid after pesticide apply 30 days and 35 days are -2% and -18%.It shows the number of WBPH rise again after a fall,the persistent bioactivity of imidacloprid are not good enough.The results of corrected efficacy of buprofezin from the time after pesticide apply 15days to 35days are both negative value.Its cure effect are worst.The corrected efficacy of thiamethoxam are -66%,-124%and-26% after pesticide apply 20days,30days,35days.The number of WBPH after the three pesticide apply all rise again,so only apply once can’t control WBPH well ,we should do the second pesticide apply. The persistent bioactivity of chlorpyriphos and pymetrozine are both well, their control effect are best.