| 小黑杨灰斑病流行动态的研究 |
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| 引用本文： | 许成启 吴力军. 小黑杨灰斑病流行动态的研究[J]. 东北林业大学学报, 1991, 19(5): 8-16 |
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| 作者姓名： | 许成启 吴力军 |
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| 作者单位： | 黑龙江省防护林研究所(许成启，汪太振，郝宏)，黑龙江省林业厅(吴力军)，黑龙江省富裕县机械化林场(魏建华) |
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| 摘 要： | 采用分期调查病情,引入模糊集论中模糊等价关系的模糊聚类分析方法,将发病数量(强度)、空间和时间动态的相互关系联系起来,作为统一体,研究了小黑杨灰斑病的流行动态,同时结合孢子捕捉观测,将灰斑病在一个生长期内的流行动态划分为J_1,J_2,J_3,J_4四个阶段。在此基础上提出了灰斑病的发展进程为始期、始盛期、盛期、未期,其时间系列大致分别为:6月上旬、6月中旬、7月上旬、8月上旬。
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| 关 键 词： | 杨树 小黑杨 灰斑病 流行动态 |
THE EPIDEMIC DYNAMICS OF GREY LEAF-SPOT OF POPULUS SIMONII * NIGRA |
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| Xu Chengqi Wang Taizhen Hao Hong. THE EPIDEMIC DYNAMICS OF GREY LEAF-SPOT OF POPULUS SIMONII * NIGRA[J]. Journal of Northeast Forestry University, 1991, 19(5): 8-16 |
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| Authors: | Xu Chengqi Wang Taizhen Hao Hong |
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| Affiliation: | Xu Chengqi Wang Taizhen Hao Hong (Protection Forest Research Institute of Heilongjiang Province) Wu Lijun (Forestry Department of Heilongjiang Province) Wei Jianhua (Fuyu Mechanization Forest Farm of Heilongjiang Province) |
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| Abstract: | Based on the method of Fuzzy theory and Cluster analysis,the epidemic dynamics of grey leaf-spot of Populus simonii * nigra has been presented by the disease condition being periodically investigated and integrated it with the dynamics of the ratio of the disease occurring space states and time. Meanwhile,the proliferation and spreading of spores were observed.So the epidemic dynamics could be divided into four periods that are the period of the beginning (about the first ten days of June),the beginning prevailing (about the middle of June),the prevailing(about the first ten days of July)and the end (about the first ten days of August). |
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| Keywords: | Populus spp. Coryneum populinum Epidemic dynamics |
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