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近十年来,白背飞虱Sogatella furcifera(Horva’th)已成为我区早稻主要害虫之一。对中稻(一季晚)和局部地区二季晚稻也有加剧危害的趋势。为了作好对白背飞虱的防治工作,笔者自1977年开始,对白背飞虱的发生和危害情况进行了调查研究,1980年以后又作了室内世代饲养和田间系统观察,现将所得资料整理报告如下。一、发生期和代数白背飞虱灯下始见期历年为3月中旬至5月初,年度间相差30～40天,有的年份可相差50天以上。据1980～1982三年田间调查,成虫分别在3月16、17和24日始见,若虫(3～4龄)在4月17～23日始见,年度间相差约10天左右。
In the past ten years, Sogatella furcifera (Horva’th) has become one of the major pests in early rice in our region. Mid-season rice (a quarter late) and late seasons rice in some areas have also intensified the trend of harm. In order to do a good job in the prevention and control of the whitebacked planthopper, the author has carried out a survey on the occurrence and the harm of the whitebacked planthopper since 1977. After 1980, he also made indoor generational rearing and field system observations. The report is as follows. First, the occurrence and algebra Whitebacked louse lamp initial see calendar period from mid-March to early May, a difference of 30 to 40 days a year, and some years can be a difference of more than 50 days. According to the three-year field survey from 1980 to 1982, the adults started to see on March 16, 17 and 24, respectively. The nymphs (3 to 4 years old) started to see on April 17 and April 23, with a difference of about 10 days in each year.