Methods for assessment of light leaf spot (Pyrenopeziza brassicae) on winter oilseed rape (Brassica napus) in the UK
Methods for assessment of light leaf spot (Pyrenopeziza brassicae) on winter oilseed rape (Brassica napus) in the UK
复制标题
英国冬季油菜（甘蓝型油菜）轻叶斑病（Pyrenopeziza bassicae）评估方法
DOI：
10.1111/j.1744-7348.1998.tb05834.x
复制
发表时间：
1998
影响因子：
2.6
通讯作者：
K. Sutherland
中科院分区：
文献类型：
--
作者：
B. Fitt;K. J. Doughty;T. Gilles;P. Gladders;J. M. Steed;H. Su;K. Sutherland
摘要
在不同地点（Rothamsted，Hertfordshire; Boxworth，Cambridgeshire;靠近Aberdeen，Scotland），用不同品种（例如布里斯托和Capitol），不同杀真菌剂处理，在不同日期取样的植物上进行的冬季油菜田间实验中，将轻叶斑病（Pyrenopeziza brassicae）评估为具有轻叶斑病的植物%、具有轻叶斑病的叶%或具有轻叶斑病的叶面积%。回归分析表明，在秋冬季节取样的植株中，光斑病叶数%与光斑病植株数%之间一直存在良好的相关性，直到光斑病植株数%接近100%。回归线的斜率和位置有时受品种、杀菌剂处理或取样日期的影响，但不受地点的影响。与病斑叶面积%和病斑叶数%之间的关系不如病斑叶数%和病斑株数%之间的关系一致，有时受品种、杀菌剂处理或取样日期的影响，但不受地点的影响。与轻叶斑病（平方根转化）和%植株的叶面积%与轻叶斑病的关系也不一致，有时受品种，杀菌剂处理，采样日期和地点。
Summary.
Light leaf spot (Pyrenopeziza brassicae) was assessed as % plants with light leaf spot, % leaves with light leaf spot or % leaf area with light leaf spot in winter oilseed rape field experiments done at different sites (Rothamsted, Hertfordshire; Boxworth, Cambridgeshire; near Aberdeen, Scotland), with different cultivars (e.g. Bristol and Capitol), different fungicide treatments, on plants sampled at different dates. Regression analyses on data from these experiments showed that there were consistently good relationships between % leaves with light leaf spot and % plants with light leaf spot for plants sampled during the autumn and winter, until the % plants with light leaf spot approached 100%. The slopes and positions of regression lines were sometimes affected by cultivar, fungicide treatment or sampling date, but not by site. The relationship between % leaf area with light leaf spot (square root-transformed) and % leaves with light leaf spot was less consistent than that between % leaves with light leaf spot and % plants with light leaf spot and was sometimes affected by cultivar, fungicide treatment or sampling date but not by site. The relationship between % leaf area with light leaf spot (square root-transformed) and % plants with light leaf spot was also inconsistent and was sometimes affected by cultivar, fungicide treatment, sampling date and site.