过去,在本县为害常规稻的稻飞虱以褐飞虱为主,白背飞虱为害不重,很少出现“穿顶”现象。1981年晚造开始大面积试种杂优稻后,白背飞虱显著上升,1982年晚造白背飞虱大发生,以“汕优6号”为主的23685亩杂优稻,受害面积23385亩,其中“穿顶”的1200亩。白背飞虱成为为害杂优稻的优势种(附表)。附表杂优稻与常规稻白背飞虱的比例 In the past, the main planthopper in the county was brown planthopper, while the white-backed planthopper was not seriously damaged. After the start of the night of 1981, a large area of ​​hybrid rice was planted, the white-backed planthopper was significantly increased, and the white-backed planthopper occurred on the night of 1982, with 23,685 mu of hybrid rice dominated by “Shanyou 6” 23385 acres, of which “through the top” of 1200 acres. White-backed planthopper become the dominant species of hybrid rice (Schedule). Schedule hybrid rice and conventional rice white-backed planthopper ratio