多虫复合为害对棉花产量产值影响途径研究  

Studies on Effect Ways of Pests in the System of Compound Injury by Several Species of Pests to Yield and Output Value of Cotton

作　　者：王瑞琪[1] 张仕福[1] 樊孝贤[1] 

机构地区：[1]湖北省农科院植保所

出　　处：《棉花学报》1996年第6期323-327,共5页Cotton Science

基　　金："八五"国家攻关项目;湖北省自然科学基金

摘　　要：根据３年田间试验结果，对所设计的６种害虫３种不同组合的棉花多虫复合为害系统，进行了害虫对棉花桃数、铃重、烂桃、僵瓣、皮棉绒长及品级、总产量和产值影响的逐步回归分析，分别建立了各复合为害系统害虫与棉花产量结构要素、品质要素、产量及产值的最优线性回归模型。定量地描述了多虫复合为害系统中害虫对棉花产量和产值的为害损失，初步探讨了多虫复合为害规律，明确了复合为害系统中各类害虫对棉花产量、品质和产值的影响途径。Field experiments on compound injury system of 3 combinations of 6 sDecies ofpests were conducted for 3 years.Optimum regressive models of pests on yield and qualityelements and output value were established by means of stepwise regression of pests onnumber and weight of boll,rotten boll,stiff cotton wool,fibre length and quality degreeof ginned cotton. The injury by several species of pests and the ways of injury by eachspecies of pest in the compound injury system to yield and quality are quantitatively eluci-dated.

关 键 词：棉花 多虫复合为害 为害损失 产量 

分 类 号：S435.622[农业科学—农业昆虫与害虫防治]