茭白纹枯病发生规律及产量损失测定

被引:9
作者
徐强
梁继农
曹碚生
江解增
机构
[1] 扬州大学农学院园艺系
[2] 扬州大学农学院园艺系 扬州
[3] 扬州
[4] 扬州
关键词
茭白; 纹枯病; 发生规律; 产量损失;
D O I
10.13802/j.cnki.zwbhxb.2002.02.005
中图分类号
S436.45 [水生菜类病虫害];
学科分类号
摘要
茭白纹枯病发生规律与产量损失的研究结果表明:高温高湿、种植过密、偏施氮肥、缺乏钾素是病害加重的主要原因;田间发病盛期在7月中旬至8月中旬;单茭重减低率与病级之间呈极显著线性相关;始病期越早,危害越重,产量损失也越大;病害危害程度与有效分蘖数(孕茭数)减少率、单茭重减低率、产量损失率之间呈高度正相关。在产量损失构成中,有效分蘖数的减少为主要因素。
引用
收藏
页码:114 / 118
页数:5
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