为确定不同向日葵种质资源在甘肃省的田间抗病性，对不同生态区域的 39份向日葵种质资源的主要病害如向日葵菌核病，黑斑病，褐斑病，锈病等进行了观察统计。结果发现，向日葵品种间存在明显的抗病性差异，食葵品种新食葵27、JK103、T902田间菌核病发病率较低，对菌核病抗性较高。油葵品种XKY1502、NXY21、陇葵杂6号田间菌核病发病率较低，对菌核病抗性较高。黄萎病、黑斑病、褐斑病及锈病的发病率均较菌核病低，说明菌核病是向日葵的主要病害。

In order to determine the field resistance of different sunflower germplasm resources in Gansu Province， the main sunflower diseases such as sclerotinia，black spot，brown spot and rust in 39 sunflower germplasm resources in different ecological areas were observed and counted. The results showed that there were significant differences in disease resistance among sunflower cultivars. The field incidence of sunflower cultivars Xinshi 27， JK103 and T902 was lower and their resistance to Sclerotinia sclerotiorum was higher. The incidence of Sclerotinia sclerotiorum of oil sunflower varieties XKY1502， NXY21 and Longkuiza 6 was lower and their resistance to Sclerotinia sclerotiorum was higher. The incidence of verticilium wilt， black spot， brown spot and rust was lower than that of Sclerotinia sclerotiorum， which indicated that Sclerotinia sclerotiorum was the main disease of sumflower.

S565.5

国家向日葵现代产业技术体系项目(CARS-16)；甘肃省农业科学院农业科技创新专项(2013GAA37)