2016年小麦白粉病在甘肃省平凉市崆峒区呈中度流行，发生面积约1.87万hm2。调查发现绝大多数品种田间病级6～7级，个别品种达到9级，抗病品种相对较少。初步分析认为生产品种抗病性偏低、秋苗及春季菌源量较大、气候条件适宜是导致小麦白粉病发生流行的主要原因。强化预警系统建设、加强抗病品种(系)的筛选与应用、种子拌种及其他农业防治技术措施的集成应用及应急防治是防控崆峒区小麦白粉病发生流行的根本之策。

Wheat powdery mildew， caused by Blumeria graminis f.sp tritici， is one of the most diseases in wheat. It is spread about 18 700 hm2 and occurrenced middle seriously in Kongtong district， Gansu province in 2016. According to investigated the resistance of commercial wheat cultivars in field， the results showed that most cultivars are susceptible in field， and its scals are 6～7. A few wheat cultivar are super susceptible, and its scals are 9. The resistant wheat cultivars are little relatively. Analisized its reason， the results showed that cultivars are susceptible， a large amount of the pathogen in autumn and spring， favorable weather conditions in winter and spring are the key factors of epidemics. Establishing the forcasting and alarming system， planting resistance cultivars， and using effective agricultural technology， including seed coating techonlogy and agricultural techonlogy， are a strategy for controlling the powdery mildew in Kongtong district in this paper.

S435.121.4

公益性行业(农业)科研专项“禾谷类白粉病和赤霉病综合治理技术研究与示范”(201303016)；国家自然科学地区基金“农家品种白大头及其衍生系天00127抗白粉病基因分子标记”(31360433)。