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通过资料整理和研究，弄清了影响棉铃虫（HelicoverpaarmigeraHiibner）二代成虫高峰期的三个主导因子。在此基础上，利用模糊列联表法进行了15年的回测和2年的预测，结果达到93．33％，可提前半月作出预测。
Through data collation and research, the three dominant factors affecting the second generation of Helicoverpa armigeraHiibner were clarified. On this basis, using the fuzzy contingency table method for 15 years of back-testing and 2-year forecast, the results reached 93.33%, can be predicted half a month ahead.