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英文文献：Composed Error Model For Insect Damage Fucntions: Yield Impact Of Rotation Resistant Western Corn Rootworm In Illinois-病虫害作用的合成误差模型:伊利诺斯州抗轮作玉米根虫对产量的影响
英文文献作者：Mitchell, Paul D.,Gray, Michael E.,Steffey, Kevin L.
英文文献摘要：
This paper describes a composed error model for estimating the conditional distribution of yield loss to serve as an insect damage function. The two-part error separates yield variability due to pest damage from other non-pest factors such as soil heterogeneity, non-uniform application of agronomic practices, and measurement errors. Various common functional forms (linear, quadratic, Cobb-Douglas, negative exponential, hyperbolic, sigmoid) for the pest damage function are presented and parameter estimation is described. As an empirical illustration, the model is used to estimate a damage function for corn rootworm, the most damaging insect pest of corn in the United States. The estimated damage function gives expected proportional yield loss as a function of the root rating difference and is used to estimate yield loss due to rotation resistant western corn rootworm in east-central Illinois. The estimated average yield loss is 11.6%, more than enough to cover the cost of a soil insecticide application. However, tremendous variability in actual loss exists, so that the probability that actual loss is less than the cost of a soil insecticide ranges 32-45%, depending on the assumed yield and price. As a result, IPM methods potentially have great value, since they can eliminate uneconomical soil insecticide applications.
本文提出了一种用于估计产量损失条件分布的复合误差模型，并将其作为虫灾函数。由两部分组成的误差将由于虫害造成的产量变化与其他非虫害因素(如土壤异质性、农艺措施的不均匀应用和测量误差)分离开来。介绍了害虫损害函数的各种常用函数形式(线性、二次型、柯布-道格拉斯型、负指数型、双曲线型、s型)，并描述了参数估计。作为一个经验例证，该模型被用来估计玉米根虫的损害函数，玉米根虫是美国最具破坏性的害虫。估计损害函数给出了预期产量损失的比例函数，作为根率差异的函数，用于估计伊利诺斯州中东部地区由于轮作抗性西部玉米根虫造成的产量损失。估计平均产量损失为11.6%，足以支付施用土壤杀虫剂的费用。然而，实际损失存在巨大的可变性，因此实际损失小于土壤杀虫剂成本的概率在32-45%之间，这取决于假定的产量和价格。因此，IPM方法具有潜在的巨大价值，因为它们可以消除不经济的土壤杀虫剂应用。
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