红萍是一种很好的稻田绿肥和饲料作物。但是,在我省由于越冬越夏困难,常造成种子不足,障碍着红萍大面积发展。尤其是夏季,从7月上旬到8月下旬,气温高,水面湿度大,红萍生活力大大减弱;同时病虫害大发生,世代重叠,繁殖快,为害严重;还有苔藻类及雷暴雨等造成红萍大量死亡。 Hongping is a good paddy green manure and feed crops. However, due to the winter over the summer more difficult, often resulting in insufficient seeds, hinder the large-scale development of Hongping. Especially in summer, from early July to late August, the temperature is high, the surface humidity is high, and the viability of Rhodiola is weakened greatly. At the same time, the occurrence of pests and diseases is large, the generations overlap, the propagation is rapid, and the damage is serious. There are also the algae and thunderstorms Hongping mass deaths.