| 豆蚜危害豇豆损失率及动态经济阈值研究 |
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| 引用本文： | 郭海明,文礼章.豆蚜危害豇豆损失率及动态经济阈值研究[J].湖南农业大学学报(自然科学版),1999,25(2):137-142. |
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| 作者姓名： | 郭海明 文礼章 |
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| 作者单位： | 1. 湖南省植保植检站,长沙,410127
2. 湖南农业大学植物科学技术学院,长沙,410128 |
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| 摘 要： | 为研究豇豆产量损失率与不同生育期蚜害率的关系，建立了美国无架豇豆产量损失率与豆蚜危害蚜率的关系模型，根据该模型推算出了豇豆苗期，花蕾期，有荚期和全生育期受蚜害损失的容限分别为９．２２％，３．０４％，９．８９％，５．２６％。根据经济阈值的理论建立了不同豇豆产量和不同产品单价条件下的动态经济阈值模型。
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| 关 键 词： | 豆蚜 豇豆 产量损失率 经济阈值 |
| 修稿时间： | 1998-10-02 |
Studies on Yield Loss and Dynamic Economic Threshold of Cowpea Aphid Aphis craccivora Koch on Cowpea,Vigna sp. |
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| Guo Haiming,Wen Lizhang.Studies on Yield Loss and Dynamic Economic Threshold of Cowpea Aphid Aphis craccivora Koch on Cowpea,Vigna sp.[J].Journal of Hunan Agricultural University,1999,25(2):137-142. |
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| Authors: | Guo Haiming Wen Lizhang |
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| Abstract: | This paper established the relational model between yield loss of cowpea and aphid injury rate of cowpea. According to this model,the time of seedling stage,flowering stage and poding stage were caculated,and the tolerance of aphid damage in the seedling stage,flowering stage,poding stage and tile growing stage was reckoned to be 9.22%,3.04%,9.89%,5.26% respectively. Finally,a dynamic economic threshold model of different normal yield of cowpea and the value of cowpea produce was established. |
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| Keywords: | Aphis craccivora cowpea yield loss economic threshold |
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