油菜菌核病俗称烂白梗,是油菜的主要病害,发生普遍,为害严重,影响油菜的产量和质量,已成为陕南油菜继续增产的限制因素。本病除为害油菜外,还可为害大白菜、甘蓝、马铃薯、番茄等多种蔬菜。南郑县是陕南稻田油菜种植面积最大县之一,常年种植面积23.4万亩,据2010年5月在齐力、爱国、强 Rape sclerotinia, commonly known as rotten white stem, is the main disease of rape. It is a common disease that causes serious damage and affects the yield and quality of rapeseed. It has become the limiting factor to continue the yield increase of rapeseed in southern Shaanxi. In addition to damage the rape of the disease, but also harmful to Chinese cabbage, cabbage, potatoes, tomatoes and other vegetables. Nanzheng County is one of the largest counties for rapeseed cultivation in the southern Shaanxi paddy field. The perennial planting area is 234,000 mu. According to May, 2010,