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应用河北省主要棉区 6 0～ 90年代的棉铃虫资料和气象资料 ,并进行 3年定点观测试验 ,建立了以“湿热系数”为主导 ,以不同气候年型为背景的棉铃虫全世代种群动态变化的指标分级系统。
The cotton bollworm data and meteorological data from 1960s to 1990s in the main cotton area of Hebei Province were used to carry out 3-year fixed-point observation and test to establish a population-generational population of Helicoverpa armigera population dominated by “damp-heat coefficient” Dynamically changing index grading system.