| 蔬菜根结线虫病情分级方法比较 |
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| 引用本文： | 肖炎农,王明祖.蔬菜根结线虫病情分级方法比较[J].华中农业大学学报,2000,19(4):336-338. |
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| 作者姓名： | 肖炎农 王明祖 |
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| 作者单位： | 华中农业大学植保系,武汉,430070 |
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| 基金项目： | 国家“九五”攻关 !( 96 0 0 5 0 1 10 0 2 )专题资助和武汉市重点项目资助 |
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| 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，而地下部位重量呈上升趋势。切根百分数法的病情级别每提高１组，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。
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| 关 键 词： | 根结线虫病 病情分级 蔬菜 分级方法 |
| 修稿时间： | 1999-12-27 |
Comparison
of Different Methods to Estimate Root-knot
Nematode Disease Grade |
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| Xiao Yannong,Wang Mingzu,Fu Yanping,Zeng Fantao.Comparison
of Different Methods to Estimate Root-knot
Nematode Disease Grade[J].Journal of Huazhong Agricultural University,2000,19(4):336-338. |
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| Authors: | Xiao Yannong Wang Mingzu Fu Yanping Zeng Fantao |
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| Abstract: | 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. |
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| Keywords: | root knot nematode estimating method of disease severity vegetable |
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