螟虫是水稻的主要害虫之一,草子留种田的稻根又是螟虫越冬的主要场所。近年来,许多地区,在跟螟虫作斗争中,大面积推广草子留种田短期灌水的方法,消灭了大量的越冬螟虫,对压低当年螟虫的发生量,减轻螟害起到较大的作用。草子留种田短期灌水,方法简便易行,省工,省力,省钱, Stem borer is one of the main pests of rice, and the remaining root of grass is the main site for stem borers overwintering. In recent years, in many areas, in the fight against stem borers, large-scale popularization of grass-leaved farming methods of short-term irrigation, the elimination of a large number of wintering borers, to reduce the incidence of stem borers and reduce the damage played a greater role. Grass seed stay irrigation short-term, the method is simple, labor-saving, labor-saving, money-saving,