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通过对2010年至2011年两年的2～6月云南元江坝区稻田内白背飞虱[Sogatella furcifera(Horváth)]及其2近缘种的数量变动进行的调查分析显示,3种飞虱的发生具有明显的时序性。稗飞虱[S.vibix(Haupt)]及烟翅白背飞虱[S.kolophon(Kirkaldy)]发生最早,是2～3月秧田内的优势种;白背飞虱发生较晚、起始虫量极低,但种群增长极快,在4月后取代上述2种成为优势种。研究结果表明,元江坝区灯下监测中出现于主虫峰前的低小虫峰可能为另外2种飞虱的种群增长所致,测报工作中应加强对3种飞虱的甄别;白背飞虱种群“低起始、高增长”的特点是当地种群繁殖与迁入种群汇聚相叠加的结果,后续研究将阐明该区域越冬白背飞虱的数量、分布及成灾贡献率。
According to the survey and analysis of the change of Sogatella furcifera (Horváth) and its 2 relatives in paddy fields in Yunnan Yujiang River from February to June in 2010 and 2011, three kinds of planthoppers The occurrence of obvious timing. S. vibix (Haupt)] and S. kolophon (Kirkaldy) occurred earliest, which was the dominant species in the seedling from February to March. The white-backed planthopper occurred later and started Very low amount of insects, but the population growth extremely fast, in April to replace the above two become the dominant species. The results showed that the low insect peak appeared in front of the main insect peak during the lamp monitoring in Yuanjiang Dam may be caused by the population growth of the other two planthoppers, and the screening of the three planthoppers should be strengthened during the test. The characteristics of planthopper population “low initial and high growth ” are the result of the superposition of local population and the migratory population. The follow-up study will clarify the quantity, distribution and contributing percentage of white-backed planthopper in the area.