根据三年的调查,我们初步认为褐稻虱在我县无霜冻出现的年份,无论成虫、若虫都可以越冬,越冬场所具备下列几个条件:1.有食料存在。褐稻虱在越冬期间,再生稻不枯萎死亡。2.冬春季气候温暖,无霜冻,一、二月份旬平均温度高于8℃。3.越冬场所湿度大,或靠近有水源的地方,一般都在背北向南的水涌河边再 According to the three-year survey, we initially think that in the year when frost-free brown planthopper appears in our county, all the adults and nymphs can winter. The overwintering places have the following conditions: 1. There is foodstuff. During winter, brown planthopper does not wither and die. 2. Winter and spring climate is warm, no frost, a, the average temperature in February is higher than 8 ℃. 3. winter places with high humidity, or close to a place where there is water, are generally back north to Shuimong River and then