当前位置: 首页 > 文章 > 蔬菜根结线虫病情分级方法比较 华中农业大学学报 2000,19 (4) 336-338
Position: Home > Articles > Comparison of Different Methods to Estimate Root knot Nematode Disease Grade Journal of Huazhong Agricultural University 2000,19 (4) 336-338

蔬菜根结线虫病情分级方法比较

作  者:
肖炎农;王明祖;付艳平;曾凡涛
单  位:
华中农业大学植保系
关键词:
根结线虫病;病情分级;蔬菜
摘  要:
以拔株数根瘤法为标准方法 ,比较了新设计的蔬菜根结线虫 3种病情分级方法。结果表明 :切根数根瘤分级法、拔株百分数分级法、切根百分数分级法和标准法的病情级别与蔬菜的生物学产量有密切关系 ;随着病情级别的增加 ,植株高度和地上部分重量显著下降 ,而地下部分重量呈上升趋势。切根百分数法的病情级别每提高 1级 ,丝瓜苗地上重量减少约 6 % ;4种分级方法在番茄根结线虫病药剂防治效果调查中 ,所获病情指数因分级标准不同而有差异 ,但防治效果都很相近 ;切根百分数分级法在实践中可以取代标准的拔株数根瘤数分级法。
译  名:
Comparison of Different Methods to Estimate Root knot Nematode Disease Grade
作  者:
Xiao Yannong Wang Mingzu Fu Yanping Zeng Fantao (Huazhong Agricultural University, Wuhan 430070,China)
关键词:
root knot nematode, estimating method of disease severity, vegetable
摘  要:
Four disease grade estimation methods are compared. The result shows that the disease indexes gotten by counting gall number of partial cut roots or whole roots (standard method ) and by measuring the percentage of galling roots in partial cut roots or whole roots are all different ,while the controlling efficacies calculated by using these indexes are similar. The biological yield of plant is closely related to the scale of the disease severity. The higher the disease index was, the shorter the plant was, and the heavier the root was. So far as the index got by measuring the percentage of galling roots in partial cut roots is concerned, the yield loss increased about 6 percent which the severity scale increased 1. The standard method could be replaced by the methoed of measuring the percentage fo galling roots in partial cut roots.\;

相似文章

计量
文章访问数: 15
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊