我国淮北平原、江汉平原、洞庭湖区、渤海湾等地区,近几年常在较大面积的地块上发生水稻缩苗症(有的称僵苗或红苗)。其特征是:水稻分蘖期,基中部叶片出现褐色斑点,顶部新叶失绿,叶脉退色,叶枕间距缩短。根系细弱,植株矮小,影 China’s Huaibei Plain, Jianghan Plain, Dongting Lake area, the Bohai Bay and other regions, in recent years often occur in a large area of ​​rice seedling (some say stiff or red seedlings). The utility model is characterized in that during the tillering stage of rice, brown spots appear on the central middle leaves, the green leaves on the top are young, the veins are discolored and the distance between the leaves and the sleeper is shortened. Roots thin, short plants, shadow