紫花苜蓿品种白粉病田间抗病性评价

Evaluation of alfalfa cultivars for resistance to Erysiphe polygoni in the field

采用田间自然接种技术 ,用田间发病率和病情指数为指标 ,对来自不同国家和地区的 9个紫花苜蓿品种白粉病抗病性进行了调查和研究 ,结果表明 ,苜蓿品种的白粉病抗性存在着显著差异。庆阳苜蓿、阿尔冈金、巨人2 0 1、金皇后等品种具有较强的抗病性 ;德宝、德福、赛特、牧歌 4 0 1。

Resistance of nine alfalfa cultivars to Erysiphe polygoni (powdery mildew disease) was characterized using nature inoculation method in the field. The morbidity and disease index were used as evaluating scales. The results showed significant differences in resistance to E.polygoni among the alfalfa cultivars. The resistant cultivars included Qingyang, Algonguin; Ameristand 201 and Golden empress,and the susceptible cultivars were Derby, Derful, Sitel, Amerigraze 401 and Sanditi.