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小麦纹枯病是近年来在我省发生普遍、危害较严重的一种主要病害。目前,已对小麦生产构成了严重威胁。为此,我们对该病害的发生危害现状,逐年加重原因等进行了初步调查研究,并提出了防治办法。一、小麦纹枯病发生现状小麦纹枯病八十年代中期以前在我省仅是局部发生的次要病害,近几年逐年加重,已成小麦产区普遍发生的一种主要病害。1990年全省发生纹枯病1394.59万亩,造成小麦产量损失80360.26吨。洛阳市1990年发生31.5万亩,1991年扩大至95.7万亩,占川灌区小麦面积的87％。据郊区及偃师县调查,小麦苗期即受该病危害,三叶期地下茎可表现典型症状,普遍率达
Wheat sheath blight is a common and serious hazard in our province in recent years. At present, it has posed a serious threat to wheat production. To this end, we conducted a preliminary investigation and study on the current situation of the occurrence of the disease and the reasons that aggravate year by year, and put forward prevention measures. First, the occurrence of wheat sheath blight Wheat sheath blight before the mid-1980s in our province is only a minor occurrence of disease, increased year by year in recent years, wheat has become a common occurrence of major diseases. In 1990, 13,949,900 mu of sheath blight occurred in the province, causing a loss of 80,360.26 tons of wheat. Luoyang City, 315,000 mu occurred in 1990, expanded to 957,000 mu in 1991, accounting for 87% of the wheat area of Sichuan irrigation area. According to the survey in the suburbs and Yanshi County, wheat seedling is affected by the disease, and the three-leaf stage underground stems can show typical symptoms,