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褐稻虱是水稻主要害虫,近年来对晚稻的为害较大,易暴发成灾。我组自1972年开始研究稻飞虱,现将有关褐稻虱的发生和生态因子关系的材料整理于下:一、越冬虫源褐稻虱以成、若虫在再生稻和落谷苗上越冬。越冬量的多少对翌年早、晚稻褐稻虱的发生量有很大关系。凡冬季暖和,霜日少的年份,再生稻和落谷苗生长好,越冬虫源多,翌年早稻褐稻虱就严重。如1975年霜日只有3天,1～2月份各旬平均温度在12℃以上,极端低温4.6℃。属暖和、霜少的年份,再生稻,落谷苗的长势好,越冬虫源多,褐稻虱严重
Brown planthopper is a major pest of rice in recent years, the greater damage to late rice, easy to outbreak disaster. My group has been studying planthoppers since 1972, and now the materials related to the occurrence of brown planthopper and ecological factors are summarized as follows: First, the overwintering insect brown planthopper to win, nymphs overwinter on ratoon rice and Gulei . The amount of overwintering on the next year early and late rice brown planthopper occurrence have a great relationship. Where the winter warm, frost less years, ratoon rice and Gulei good growth, more insect pests, the next year early rice brown planthopper is serious. Such as the 1975 Frost Day only 3 days, January to February the average temperature of each ten days above 12 ℃, extreme low temperature 4.6 ℃. Is a warm, frost-less years, ratoon rice, Gu Gu Miao growing well, more insect pests, brown planthopper serious