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２００２年东北玉米产区普遍严重发生玉米丝黑穗病，造成玉米生产的巨大损失，导致农民减收，由此引发了多起农民集体上访事件。为深入了解玉米丝黑穗病发生的实际情况、分析病害暴发原因、掌握玉米品种的真实抗性，并提出相应的防治措施，在全国农业技术推广服务中心组织下，
In 2002, serious maize head smut occurred in the maize producing areas in the northeast of China, causing huge losses of corn production, resulting in the reduction of farmers’ income. As a result, many collective petitions of peasants were triggered. In order to understand the actual situation of maize head smut, analyze the causes of disease outbreak, master the true resistance of maize varieties and put forward corresponding control measures. Under the organization of the national agricultural technology extension service center,