| 矢尖蚧种群密度简易估计法的研究 |
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| 引用本文： | 陈邦强,王代武,张权炳. 矢尖蚧种群密度简易估计法的研究[J]. 植物保护学报, 1989, 16(3): 153-156 |
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| 作者姓名： | 陈邦强 王代武 张权炳 |
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| 作者单位： | 中国农业科学院柑桔研究所，中国农业科学院柑桔研究所，中国农业科学院柑桔研究所 |
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| 摘 要： | 本文根据Iwao的零频率法和Gerrard等的阈限密度法,采用无虫叶片占全部抽样叶的比率来估计矢尖蚧雌成蚧和幼蚧的平均密度,并提出了不同虫口密度和抽样精度下样本量的确定方法。
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| 关 键 词： | 矢尖蚧 种群密度 简易估计法 |
TWO EASY WAYS FOR ESTIMATING THE POPULATION OF UNASPIS YANONENSIS KUWANA ON CITRUS |
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| Chen Bangqiang,Wang Daiwu and Zhang Quanbing. TWO EASY WAYS FOR ESTIMATING THE POPULATION OF UNASPIS YANONENSIS KUWANA ON CITRUS[J]. Acta Phytophylacica Sinica, 1989, 16(3): 153-156 |
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| Authors: | Chen Bangqiang Wang Daiwu Zhang Quanbing |
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| Affiliation: | Citrus Research Institute, Chinese Academy of Agricultural Sciences,Citrus Research Institute, Chinese Academy of Agricultural Sciences and Citrus Research Institute, Chinese Academy of Agricultural Sciences |
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| Abstract: | According to Iwao's zero frequency method and Gerrard's thresh-old density method,the densities of the female and nymph of Unaspisyanonensis Kuwana on citrus were estimated,depending on the frequen-cy of leaf without this pest.The optimum numbers for sampling underdifferent tolerances and zero frequencies were determined,and somesampling tables and figures made by microcomputer were presented. |
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| Keywords: | Unaspis yanonensis population density easy ways to estimate |
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