| 玉米螟为害玉米的产量损失估计及单株允许残留虫量 |
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| 引用本文： | 杨樟法,吕仲贤,王桂跃,王植杏,李方许.玉米螟为害玉米的产量损失估计及单株允许残留虫量[J].植物保护学报,1994,21(4):333-337. |
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| 作者姓名： | 杨樟法 吕仲贤 王桂跃 王植杏 李方许 |
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| 作者单位： | 浙江省农业科学院植物保护研究所，浙江省农业科学院植物保护研究所，浙江省东阳玉米研究所，浙江省植物保护总站，浙江省临海双港测报站 杭州 310021，杭州 310021，东阳，杭州，临海 |
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| 摘 要： | 为探明亚洲玉米螟为害春、秋玉米的产量损失,于1990年始在浙江东阳玉米研究所采用田间自然种群为害与在玉米不同生育期采取药剂控制使害虫造成一定梯度相结合的方法,研究螟害对产量损失的影响。结果获得螟害对产量损失的两个曲线方程: 春玉米:Y_1=1-0.67 (1-0.67)×0.7558~(P 0.7)] 秋玉米:Y_2=1-0.70 (1-0.70)×0.7767~(P 1)] P为单株玉米上平均虫量,0.7和1为最后单株玉米上允许的残留虫量(包含蛀孔),损失率分别为5.9％、6.7％。
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| 关 键 词： | 亚洲玉米螟 曲线方程 残留虫量 |
ON THE YIELD LOSS ESTIMATION OF CORN CAUSED BY ASIAN CORN BORER AND TOLERANT LARVA NUMBER PER PLANT |
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| Yang Zhangf,Lu Zhongxian,Wang Guiyue,Wang Zhixing and Li Fangxu.ON THE YIELD LOSS ESTIMATION OF CORN CAUSED BY ASIAN CORN BORER AND TOLERANT LARVA NUMBER PER PLANT[J].Acta Phytophylacica Sinica,1994,21(4):333-337. |
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| Authors: | Yang Zhangf Lu Zhongxian Wang Guiyue Wang Zhixing and Li Fangxu |
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| Institution: | Institute of Plant Protection, Zhejiang Academy of Agricultural Sciences, Hangzhou,Institute of Plant Protection, Zhejiang Academy of Agricultural Sciences, Hangzhou,Dongyang Institute of Corn Researches, Zhejiang Province, Dongyang,Zhejiang Provincial Station of Plant Protection, Hangzhou and Shuanggang Station of Crop Pest Forecasting, Linhai City, Zhejiang Province |
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| Abstract: | In 1990 - 1992, the effects of damage of Asian corn borer (ACB) Ostrinia fur-nacalis (Guenee) on the yield loss of spring and autumn corn were studied in Dongyang Institute of Corn Researches, by adopting insecticide spraying on natural population of ACB at different developmental stages of corn. Two larva density-yield loss equations derived from the results were as follows:
where Y1 and Y2 are the yield loss rates of spring and autumn corn, respectively; P is the mean larva number/plant; and 0. 7 and 1 are the tolerant thresholds of larva number/plant; the corresponding yield loss rate of corn are 5. 9% and 6. 7%, on spring and autumn corn, respectively. |
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| Keywords: | Asian corn borer corn larva density-yield loss equation toler- ant larva number |
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