棉花黄萎病田间发病时间和发病速度的研究  

Study on Diseased Time and Disease Developing Rate of Cotton Verticillium Wilt

作　　者：刘占国[1] 马峙英[1] 张桂寅[1] 吴立强[1] 

机构地区：[1]河北农业大学

出　　处：《棉花学报》1999年第4期195-199,共5页Cotton Science

基　　金：河北省重大科技攻关项目

摘　　要：１９９４～１９９７年，利用３７个陆地棉品种（系）研究了黄萎病对皮棉产量的影响，分析了病情指数的主要影响因素。结果表明，病情指数越高，产量损失越大；病情指数的大小主要取决于发病时间和发病速度两个因素，这两个因素在不同年份表现相对稳定，品种间存在显著差异。由于发病时间和发病速度的不同，导致了不同生长阶段品种间感病程度的相应变化。在抗病育种中，选择发病时间晚和发病速度慢的品种（系）是较理想的抗病类型。The influence of cotton Verticillium wilt on lint yield was studied, and the main factors affecting disease index were analysised using 37 upland cotton varieties from 1994 to 1997. The result showed that the higher the disease index of a variety was, the ligher lint yield it lossed. The disease index depended mainly on both the diseased time and the disease developing rate. There was statistical significance of the diseased time among varieties, and so did the disease developing rate. These two factors were stable in different years. The disease indexes of varieties were varying with development because of the disease developing rate. The variety with later diseased time and lower disease developing rate was the ideal parent in disease resistance breeding.

关 键 词：棉花 黄萎病 发病时间 发病速度 

分 类 号：S435.621[农业科学—农业昆虫与害虫防治]