| 棉田玉米螟防治指标的研究 |
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| 引用本文： | 刘德钧,袁全昌.棉田玉米螟防治指标的研究[J].植物保护学报,1981,8(4):241-247. |
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| 作者姓名： | 刘德钧 袁全昌 |
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| 作者单位： | 上海市农科院植保所，上海市农科院植保所 |
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| 摘 要： | 通过玉米螟卵量与棉花被害株、被害铃关系的研究以及被害所造成产量损失的调查,根据经济阈值推算出以百株卵量表示的防治指标。玉米螟卵量(x)与被害株数(y)、被害铃数(n)呈正相关,关系式第1代为:y=1.49x-0.22,第2代为:y=3.47x+0.21,第3代为:n=3.25x+1.2。被害株损失青铃数,第1代为4.36±0.55只,第2代为3.41±0.30只。但与受害株相邻的健株铃数多于一般健株。用药一次每亩成本150元,防治效果为70%,推算出的防治指标为:第1代百株卵量2.2～2.8块,第2代0.9～1.1块,第3代3.1块。经多点大田验证,试验结果与实际情况基本相符。
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STUDIES ON THE ECONOMIC THRESHOLD OF THE ASIATIC CORN BORER [OSTRINIA FURN ACALIS (GUENCE)]IN THE COTTON FIELD |
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| Liu Dejun and Yuan Quanchang.STUDIES ON THE ECONOMIC THRESHOLD OF THE ASIATIC CORN BORER [OSTRINIA FURN ACALIS (GUENCE)]IN THE COTTON FIELD[J].Acta Phytophylacica Sinica,1981,8(4):241-247. |
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| Authors: | Liu Dejun and Yuan Quanchang |
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| Institution: | Institute of Plant Protection, Shanghai Academy of Agricultural Sciences and Institute of Plant Protection, Shanghai Academy of Agricultural Sciences |
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| Abstract: | In the vicinity of shanghai, the damage to cotton caused by the Asiatic Corn Barer has been increasing during recent years and in many places has surpassed that of the pink boll worm, the major pest of cotton in Shanghai area. For the efficient use of chemical control, it is necessary to estimate the yield loss due to it''s damage and establish it''s economic threshold. |
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