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近年来,随着晚粳和粳糯稻在我省种植面积的扩大,稻曲病的危害也逐年加重。它俗称青粉病,多在水稻抽穗,扬花时形成穗部病害。(一)识别和发生。稻曲病病菌为害穗部的谷粒,先在颖壳的合缝处露出淡黄绿色菌块,逐渐膨大后包裹全部颖壳;形状比健谷大3—4倍,为墨绿色,表面光滑,最后开裂,布满墨绿色粉末。水稻生长后期过于嫩绿茂盛,开花期又遇降雨和高温时,易诱发此病。氮肥施得过多或田水落干过迟则发病
In recent years, with the late japonica and japonica glutinous rice planting area in our province to expand, the damage caused by smut also increased year by year. It is commonly known as powdery mildew, mostly in the heading of rice, flowering when the formation of ear disease. (A) identify and occur. False false smut pathogens damage the ears of the grain, the first glume in the glume exposed yellowish green bacteria blocks, gradually enlarged after all wrapped glume shell; shaped 3-4 times larger than the healthy valley, dark green, smooth surface , Finally cracked, covered with dark green powder. Late rice growth is too tender green lush, flowering and rain and high temperature, easy to induce the disease. Nitrogen fertilizer too much or Tian Shuiqian too late onset