【摘要】 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１３８２。更多还原

【Abstract】 ? On the basis of investigations of Rhynchosprorium secalis Davis disease on single sowing artificial Festuca arundinacea grasslands,linear relation between disease index and yield loss rate was analysed to establish the economic threshold model and get reference for controlling R.secalis Davis.The results show that correlation of forage yield loss and disease index is extremely significant,and economic threshold model for disease controlling is X=13.4425+(134.1382C/PY),and the critical disease index is 13.82.更多还原