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中文摘要：
利用刺吸电位图（EPG）比较分析了两个致害性不同的褐飞虱种群（TN1种群、Mudgo种群）在感虫品种TN1和抗性品种Mudgo（含Bph1抗虫基因）上的取食行为。结果表明,种群类型、水稻品种对I波的影响最明显,A波次之,S波再次之;试虫性别对各参数均无显著影响。TN1种群在TN1上及Mudgo种群在TN1、Mudgo上这3种能致害处理下的S波、A波均短于TN1试虫在Mudgo上（不能致害）,其中A波的差异达显著水平;而能致害的3种处理的I波持续时间则显著长于不能致害处理。若以3 h内I波持续时间75 min为分界线,高于该值为能致害,低于该值为不能致害,对TN1种群、Mudgo种群致害性的判别准确率分别为82.6%和100%。提出该参数可用于进一步开发褐飞虱个体致害性检测新技术。
英文摘要：
The electrical penetration graph（EPG） of two populations of Nilaparvata lugens with different virulence（TN1 population,Mudgo population） on susceptible rice variety TN1 and resistant rice variety Mudgo（with resistance gene Bph1） were studied.The results showed that duration of I waveform significantly affected by population of N.lugens and rice variety,followed by A waveform,then S waveform.The sex of N.lugens did not affect the three types of waveform.Three virulent treatments（TN1 population on TN1,Mudgo population on TN1 and Mudgo） showed shorter S and A waveforms compared with non-virulent treatment（TN1 population on Mudgo）.And a significant difference in A waveform between virulent treatments and non-virulent one was found.The I waveform under the three virulent treatments was significantly shorter than that under non-virulent treatment.The accuracies to distinguish the virulence of TN1 population and Mudgo population were 82.6% and 100%,respectively with 75 min of I waveform in a 3-h record period as a criterion（i.e.,I waveform more than 75 min represented virulent,less than 75 min represented non-virulent）.It is suggested that the duration of I waveform is a possible alternative for monitoring the virulence of N.lugens individual.
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