【摘要】 1985—1989年在武昌研究了亚洲玉米螟种群动态及玉米受害后产量损失,组建了用于玉米螟预测和防治的多元动态经济阈值模型。模型在计算机上显示全部过程,模拟模型经过生产实际检验,效果良好。更多还原

【Abstract】 The population dynamics of Asian corn borer（ACB） Ostrinia furnicalis and the yield loss caused by it were studied in Wuchang in 1985—1989. A general model for its multivariate dynamic economic threshold is established as Where X is the interval from emergence of first eggmass to sampling date, t denotes time, and a and b are Logistic parameters which are varied with defferent ACB generations. The value of Ki（p₁,p₂,...,p_n） is determined by state i, which is described with a property serial value Pj（j=1,2,...,n） named state index. The model is programmed through IBM PC/AT microcomputer and validated in corn production.更多还原