The Study of Cucumber Root-knot Nematode Disease Index Classification Method
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摘要: 采用根畸变 (根结或根肿大) 百分率统计法、数根瘤法、根结百分率3种方法来比较黄瓜 (嫁接黑籽南瓜) 根结线虫病情指数, 结果显示:数根瘤法和根结百分率的方法统计病情指数分别为25.33和42.67, 根畸变 (根结或根肿大) 百分率统计病情指数为61.33, 与数根瘤法和根结百分率所得数据相比在P0.05上差异显著;根畸变 (根结或根肿大) 百分率与数根瘤法和根结百分率法相比, 前者可以较客观地反映出不同程度的发病危害情况。Abstract: In recent years, the root knot nematode disease often occurred in Ding ji, Huainan, cultivation and management cucumber by most grafting black seed pumpkin in this region.The main symptoms of ill root hair after grafting was swelling, decay of the parts root, little or no lateral roots and fibrous roots.The light root was mainly some number root node of the parts root.In this paper, through root distortion (root knot or root nodes) percentage statistics, nodule number, root knot percentage method, 3kinds of method to compare the cucumber (grafted black seed pumpkin) root knot nematode disease index.The results showed that disease index of the nodule number and root knot percentage method are 25.33 and 42.67, root distortion (root knot or root nodes) to calculate disease index is 61.33, significant differences on the P0.05 compared with the number of nodule and root node percentage.Root distortion (root knot or root nodes) compared with the nodule number and root knot percentage method, the former can reflect objectively damage of different degrees.
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Key words:
- root-knot nematode /
- disease index /
- drading standards
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