| 桑蓟马种群动态,抽样技术及危害指标研究 |
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| 引用本文： | 许晓风 张伯林. 桑蓟马种群动态,抽样技术及危害指标研究[J]. 安徽农业大学学报, 1993, 20(1): 72-78 |
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| 作者姓名： | 许晓风 张伯林 |
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| 作者单位： | 安徽农业大学蚕桑系(许晓风，刘树峰)，安徽省农科院蚕研所(张伯林) |
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| 摘 要： | 本文对桑蓟马种群时、空动态及危害指标进行了研究。结果表明:桑蓟马在田间呈聚集分布,虫口密度持续增长,高峰虫量叶随叶位上升而上升,具显著的分层危害特点。在此基础上讨论了该虫的抽样技术,给出了理论抽样公式和防治阈值确定上序贯抽样的应用实例。首次提出了危害指数的概念和计算公式并进行了初步验证。
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| 关 键 词： | 桑蓟马 种群动态 危害指数 桑树 |
Studies on Population Dynamic State, Sampling Technique and Harmfulness Index of Mulberry Thrips (P. mori Niwa) |
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| Xu Xiaofeng,Liu Xufeng,Chang Boling Department of Sericulture,Anhui Agricultural University Institute of Sericulture,Anhui Academy of Agricultural Science. Studies on Population Dynamic State, Sampling Technique and Harmfulness Index of Mulberry Thrips (P. mori Niwa)[J]. Journal of Anhui Agricultural University, 1993, 20(1): 72-78 |
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| Authors: | Xu Xiaofeng Liu Xufeng Chang Boling Department of Sericulture Anhui Agricultural University Institute of Sericulture Anhui Academy of Agricultural Science |
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| Affiliation: | Xu Xiaofeng,Liu Xufeng,Chang Boling Department of Sericulture,Anhui Agricultural University Institute of Sericulture,Anhui Academy of Agricultural Science |
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| Abstract: | The timely and spatial dynamic states of mulberry thrips population and the relationship be-tween thrips density and leaf symptom were studied in this paper. The results showed that the dis-tribution of thrips population in the mulberry field appeared aggregated; its population density in-creased continously with time and thrips kept concentrating on leaves on upper part of the shootsduring the whole growing seasons. Based on the established Iwao regression equation (M=5. 23+1. 01?), the theorical sampling formula of thrips as well as an example of applying sequentialsampling technique in the determination of its control threshold value were provided. In addition,a harmfulness index--Q value was recommended and preliminarily examined for the first time. |
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| Keywords: | Mulborry thrips Population dynamic state Sampling technique Harmfulness index |
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