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本文运用灰色系统聚类分析理论与方法，对农作物病害发生程度的预测预报技术作了新的尝试．经对850农场大豆籽粒灰斑病12年历史资料拟合，符合率达91.67％，对1992和1993年灰斑病发生与流行程度的预测预报结果准确．这对农作物病害的预测预报提供了一种新的研究手段．
In this paper, using the theory and method of gray system cluster analysis, this paper makes a new attempt to predict the degree of crop disease. The coincidence rate reached 91.67% on the 12-year historical data of soybean gray leaf spot on 850 farms, and the prediction and forecast of occurrence and epidemic degree of gray leaf spot in 1992 and 1993 were accurate. This provides a new method of forecasting crop diseases.