褐稻虱是水稻主要害虫之一。自1968年以来,在温州地区连续几年大发生,尤以1969年最为猖獗,早、晚稻均遭严重危害,使水稻生产受到很大的损失。摸清褐稻虱的发生规律进行有效的防治是确保水稻高产丰收的关键之一。因此,我所自1970年开始对褐稻虱进行了调查研究。现将结果整理如下:一、发生规律(一)越冬情况:从1970年11月中、下旬开始至1972年4 Brown planthopper is one of the major pests in rice. Since 1968, several serious occurrences have taken place in Wenzhou area, especially in 1969, causing serious damage to both early and late rice and greatly impaired rice production. To find out the regularity of brown planthopper is one of the keys to ensure high yield and high yield of rice. Therefore, I have been studying the brown planthopper since 1970. Now the results are organized as follows: First, the occurrence of law (a) winter conditions: from mid-1970 November, late in 1972 4