一、稻纹枯病发生为害情况近两年来,黄岩、温岭等县的水稻高产地区,由于密植程度和施肥水平的提高,水稻纹枯病普遍发生。部分田块没有做好防治工作,发病后产量损失很大:早稻轻的损失5～7％,一般损失12％左右,严重的损失19％左右;连作晚稻农星58号,根据发病分级测定, First, the incidence of rice sheath blight The past two years, Huangyan, Wenling counties and other high-yielding areas of rice, due to close planting and fertilization levels, rice sheath blight widespread. Some plots did not do a good job of prevention and treatment work, the yield loss after the onset of a great loss: early rice loss of light 5 to 7%, the general loss of about 12%, a serious loss of about 19%; even late rice Star No. 58,