稻纵卷叶虫是浙南沿海平原稻区的主要害虫之一。近几年来,随着矮脚南特等宽叶品种的推广普及,该虫的发生面积逐年有所扩大,为害程度渐趋严重。据初步统计,1957年温、台两专区发生面积总共只有9万余亩,到1959年蔓延到58.3万亩,1960年维持在50万亩左右,约占当年水稻面积的12%。1961年由于夏秋季长期干旱,发生 Rice leafroller is one of the major pests in the rice farmland along the coastal plains in south Zhejiang. In recent years, with the popularization of wide-leaved varieties such as Dantou Nante, the occurrence area of ​​this pest has been expanded year by year, and the degree of damage becomes more and more serious. According to preliminary statistics, in 1957, there were a total of only 90,000 mu of land in Wenzhou and Taiwan areas, spreading to 583,000 mu in 1959 and about 500,000 mu in 1960, accounting for about 12% of that year’s rice area. 1961 due to prolonged drought in summer and autumn, occurred