陕西关中为全国主要产麦区之一。解放以后,已逐步全部换种了「碧蚂一号」和「6028」,随着这两个品种的推广,小麦杆黑粉病也普遍发生,特别是「6028」受害最严重。通过调查,长安、武功等县在个别田里有高达44.7%,43.83%的发病率。平均发病率在武功达到5.54%,8.70%。「碧蚂一号」在长安县、商县的个别田里也有高达19.9%,18.39%的发病率。 Shaanxi Guanzhong is one of the main producing areas in the country. After the liberation, all of them have been gradually replaced with “Bi Ma One” and “6028”. With the promotion of these two varieties, the occurrence of wheat stem powdery mildew has also been widespread. In particular, “6028” has suffered the most. Through the investigation, Chang’an, martial arts counties and other counties in up to 44.7%, 43.83% incidence. The average incidence of martial arts reached 5.54%, 8.70%. “Pitt No. 1” in Chang’an County, Shangxian individual fields also have as high as 19.9%, 18.39% incidence.