| 王萌 范咏梅 李璐 柳志强 张宇 杨叶.辣椒白粉病病株田间分布型研究[J].广东农业科学,2014,41(2):83-86 |
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辣椒白粉病病株田间分布型研究 |
| Field distribution pattern of diseased plantof pepper powdery mildew |
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| DOI： |
| 中文关键词: 辣椒 白粉病 病情指数 田间分布型 |
| 英文关键词: pepper powdery mildew disease index field distribution pattern |
| 基金项目:国家科技支撑计划项目2012BAK01B05昌江
县海南大学县校合作项目；昌江县瓜季节瓜菜标准化生产基地
建设冶；海南省标准化项目2012-004 |
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| 摘要点击次数: 1880 |
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| 中文摘要: |
| 辣椒白粉病是由辣椒拟粉孢也Oidium taurica(L,v.)E.S.Salman页危害引起的，利用6 种空间分布型聚集度指标
和Lwao M*-m 回归法对辣椒白粉病空间分布型、不同发病程度与空间分布的关系进行研究。结果表明院辣椒白粉病发生
期病株垂直分布下，病株在所有调查田块均属于聚集分布；植株中部、下部叶片水平分布规律，表明3个田块属于聚集分
布，其他7个田块属于均匀分布；病情指数(DI)与频次检验垂直分布型的关系，表明DI无论为何值时，垂直方向上分布型
均为聚集分布，表现为点片发生；DI与频次检验下部叶片水平分布型的关系，表明DI 在0.1827耀0.5160 间,呈负二项分布
Neyman A型分布, 分布型为聚集分布，表现为点片发生；DI从大于0.5160 至等于0.9951时，呈波松分布、二项分布或
Poisson原二项分布,分布型为均匀分布，表现为连片发生；病情指数与频次检验中部叶片水平分布型的关系，表明病情指数在0.0623，0.5086 间,呈负二项分布Neyman(n)型分布,分布型为聚集型分布，表现为点片发生；病情指数从大于0.5086 至等于0.9858时呈二项分布、波松分布或Poisson原二项分布分布型为均匀分布，表现为连片发生。 |
| 英文摘要: |
| Pepper powdery mildew is an important disease in pepper growing area, caused by Oidium taurica(L佴v.)E.S.
Salman. By aggregate indices and Lwao M*-m regression, 6 spatial distribution patterns and the relationship between different
disease severity and spatial distribution, were studied in this research. The result showed that the diseased plants in all
survey plots were aggregated distribution under vertical distribution during the occurrence period of pepper powdery mildew,
the leaves in central and lower part of plant were horizontal distribution, indicating that three plots were aggregated
distribution, and other seven plots were evenly distributed; the relationship of disease index (DI) and frequency of inspection
of the vertical distribution type, showed that no matter what value of the DI, the distribution pattern in the vertical direction
were aggregated distribution, expressed as point and space occurrence of the disease. The relationship of DI and frequency of
inspection of the leaves of lower part of plant with horizontal distribution type, with DI of 0.1827 to 0.5160, was the negative
binomial distribution, Neyman Distribution A, the distribution-type was aggregated distribution, expressed as point and space
occurrence of the disease; when 0.5160 |
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