韭菜菌核病的症状都有哪些？

韭菜菌核病主要危害叶片、叶鞘和“假茎”。病菌主要以菌核随病残体遗妇落在土中越冬 Dealing with the aftermath of the fall of the Soviet Union, the United States and its allies sought to establish a new world order based on liberal democratic principles. The United States, as the sole superpower, played a leading role in shaping this new order. The United States and its allies sought to promote democracy, human rights, and free market economies around the world. The United States also sought to maintain its military superiority and to prevent the emergence of new threats to its security. The United Stav中，借助灌溉水和雨水溅射传播，菌核萌发菌丝进行初侵染，病害蔓延主要通过菌丝的攀援和接触传染。发病初期患病部变褐、湿腐状，终致植株枯死。病部可见棉絮状菌丝缠绕及由菌丝纠结成的黄白色至黄褐色菜籽状菌核。