| 霍 行1，李 悦2，卢燕回3，胡成慧1，莫映熙1，黎起秦1，林 纬1，袁高庆1.烟草立枯病发生因素分析[J].广东农业科学,2018,45(1):70-74 |
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烟草立枯病发生因素分析 |
| Factors influencing occurrence of sheath blight disease in tobacco |
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| DOI：10.16768/j.issn.1004-874X.2018.01.012 |
| 中文关键词: 烟草立枯病 立枯丝核菌 消长规律 发病因素 品种抗病性 |
| 英文关键词: tobacco damping-off Rhizoctonia solani fluctuation law influence factors resistantance of
cultivar |
| 基金项目:中国烟草总公司广西壮族自治区公司科技创新项目（2014-07） |
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| 摘要点击次数: 2006 |
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| 中文摘要: |
| 为了明确烟草立枯病的田间发生动态及其影响因素，2015 年对该病病情及土壤带菌量进行系
统调查，应用SAS 软件分析了多种气象因素及土壤带菌量对该病发生的影响，并测定了14 个烟草品种对
立枯病的抗病性。结果显示，该病在烟草团棵期开始出现，打顶期为盛发期，在采收期达到最高峰；对病情
指数（y）影响效果最显著的两个因素是周平均相对湿度（x4）和周平均土壤菌源量（x7），回归方程为y =
0.02018x4 + 0.03945x7 - 1.0054（R2 = 0.994）。供试的14 个烟草品种中，云烟97、红花大金元、云烟87 和云
烟100 属于抗病品种，云烟203 和安烟2 号分别属于中感和感病品种，其他8 种表现为中抗。 |
| 英文摘要: |
| In order to clarify epidemic dynamics of sheath blight disease and its influencing factors in field，
the occurrence of the disease and population of Rhizoctonia solani in soil were systematically investigated in 2015，
and the impact of meteorological factors and total number of bacteria in soils were analyzed using SAS software.
Meanwhile，the resistance of 14 tobacco cultivars to sheath blight disease was tested. The results showed that
the first signs of disease appear at the resettling growth stage during harvest，the disease spread rapidly at the
topping stage，reaching its peak on pick period. Weekly average relative humidity（ x4） and pathogen quantity in
soil（ x7） were closely related with disease index（ y），with regression equation y = 0.02018x4 + 0.03945x4 - 1.0054
（R2 = 0.994）. Fourteen tobacco cultivars had different levels of disease resistance to the disease. Among them，
Yunyan 97，Honghuadajingyuan，Yunyan 87 and Yunyan 100 were resistant cultivars，Yunyan 203 and Anyan
No.2 were moderate susceptible and susceptible ones，respectively，while the remaining cultivars were categorized as
moderately resistant ones. |
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