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玉米丝黑穗病[Phacelofheca reiliana(kiihnclint)]在20世纪80年代初是山西省孝义市玉米常见的病害之一。到80年代中、后期,由于推广植保综合防治技术,该病得到了有效控制。近年来,随着种子市场的开放,大量品种的引进,一些品种抗病性下降及大面积多年连作,造成该病的发生和为害又迅速回升,并呈明显加重趋势。为探明发病原因,并寻找经济有效的防治措施,笔者于2008～2009年在本市玉米田进行了调查研究。
Phacelofeca reiliana (kiihnclint) was one of the common maize diseases in Xiaoyi City of Shanxi Province in the early 1980s. By the mid-1980s, due to the promotion of integrated plant protection and prevention techniques, the disease was effectively controlled. In recent years, with the opening of the seed market, the introduction of a large number of varieties, the decline of disease resistance of some varieties and the continuous operation over large areas over many years, the occurrence and damage of the disease have rapidly recovered again with a marked increase trend. In order to find out the cause of the disease and find out the economic and effective control measures, the author carried out the investigation in the corn field of this city from 2008 to 2009.