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2010年小麦白粉病在甘肃陇南麦区呈中度偏重流行,发生面积约23万hm2,发生较往年偏重,部分严重感病品种田间病级8～9级。通过调查和分析,认为含有Pm8的哺育品种种植面积大、Avr8在田间毒性频率高、秋苗菌源量大、早春及冬季气候条件适宜是导致2010年小麦白粉病在甘肃陇南发生流行的主要原因。提出了加强抗病品种的筛选与合理布局、应用农业防治技术措施、强化预警系统建设、做好种子拌种剂应急防治的陇南白粉病综合治理技术措施与防控策略。
In 2010, wheat powdery mildew was moderately prevalent in the wheat growing areas of Longnan in Gansu Province, with an area of about 230,000 hm2, which was more serious than in previous years. Some serious susceptible cultivars ranged in grade 8 to 9. Through investigation and analysis, it is considered that the cultivated area of Pm8-containing nursery is large, the frequency of Avr8 in field is high, the amount of autumn seedlings is large, and the suitable climatic conditions in early spring and winter are the main causes of the occurrence of wheat powdery mildew in Longnan, Gansu . Proposed to strengthen the screening and rational distribution of disease-resistant varieties, the application of agricultural control measures to strengthen the early warning system construction, good seed dressing prevention and control of Longnan powdery miller comprehensive management of technical measures and prevention and control strategies.