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在苇状羊茅单播人工草地调查禾草云斑病情的基础上，分析了病情指数与产量损失率之间的线性关系。旨在建立苇状羊茅禾草云斑病防治的经济阈值模型，为苇状羊茅禾草云斑病的防治提供参考。结果表明，其病情指数与产量损失率相关极显著，防治的经济阈值模型为Ｘ＝１３．４４２５＋（１３４．１３８２Ｃ／ＰＹ），临界病情指数为１３８２。
Based on the investigation of grass spot cloud disease in the single-sown artificial grassland of Fescue, the linear relationship between the disease index and yield loss rate was analyzed. The aim of this study is to establish an economic threshold model for the prevention and cure of Fusarium graminearum, which provides a reference for the prevention and cure of Fusarium graminearum. The results showed that the disease index was significantly correlated with the rate of yield loss. The economic threshold model for prevention and treatment was X = 13.4425 + (134.1382C / PY) and the critical disease index was 1382.