70年代末期以来,小麦纹枯病日趋严重,已成为江苏省及其邻近地区小麦高产稳产的严重障碍。明确病害的消长动态,掌握发生流行规律,是合理防治小麦纹枯病的理论基础。 材料和方法 选择小麦纹枯病重病田块设立试验小区。供试小麦品种为扬麦4号和宁麦6号。采用定点系统观察法,小区重复三次,2月底定株挂牌,每重复50单株,返青后进行系统调查,病情按5级标准记载。 The worsening of wheat sheath blight has become a serious obstacle to the high and stable yield of wheat in Jiangsu Province and its neighboring areas since the late 1970s. A clear disease growth and decline, to grasp the occurrence of epidemic law, is the rationale for the rational control of wheat sheath blight. MATERIALS AND METHODS Selection of wheat sheath blight disease plots set up test plot. The wheat varieties tested were Yangmai 4 and Ningmai 6. Using fixed-point system observation method, plots repeated three times, by the end of February, each plant was listed, each replicate 50 plants, back to green after a systematic investigation, the disease according to the standard of 5 records.