| 直纹稻弄蝶为害损失及防治指标的初步研究 |
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| 引用本文： | 刘绍友,张兴华,王波,吴明庆.直纹稻弄蝶为害损失及防治指标的初步研究[J].植物保护学报,1990,17(3):201-207. |
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| 作者姓名： | 刘绍友 张兴华 王波 吴明庆 |
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| 作者单位： | 西北农业大学，陕西省西乡县农业技术站，陕西省西乡县农业技术站，陕西省汉中地区植物保护站 |
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| 摘 要： |
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| 关 键 词： | 直纹稻弄蝶 为害 防治 指标 水稻 |
PRELIMINARY STUDIES ON THE DAMAGE AND ECONOMIC THRESHOLD OF RICE LEAF-TIER TO RICE |
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| Liu Shaoyou,Zhang Xinghu,Wang Bo and Wu Mingqing.PRELIMINARY STUDIES ON THE DAMAGE AND ECONOMIC THRESHOLD OF RICE LEAF-TIER TO RICE[J].Acta Phytophylacica Sinica,1990,17(3):201-207. |
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| Authors: | Liu Shaoyou Zhang Xinghu Wang Bo and Wu Mingqing |
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| Institution: | Northwest Agricultural University,Agrofechnical Extension Station of Xixiang County, Shaanxi Province,Agrofechnical Extension Station of Xixiang County, Shaanxi Province and Plant Protection Station of Hanzhong Prefecture, Shaanxi Province |
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| Abstract: | In 1981-1987,the damage to rice of the third generation rice leaf-tier Parnara guttata Bremer et Grey larvae was studied.The results showed that there was positive correlation between larva density(x) and injuredleaf rate(A),the linear regression equation was expressed as:A=2.8637+0.1564X The relationship between rice yield loss rate(Y) and injured leaf areawas expressed as:Y=-5.3+0.2762a1+0.1576a2 where a1 and a2 were injured area of lst and 2nd leaves,respectively. |
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| Keywords: | Parnara guttata damage economic threshold |
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