研究了具有经济阈值和人文控制策略的植物疾病模型。根据某一参数的三种情况分析了唯一的正的周期解的存在性,并利用定性理论给出了在该参数某种范围下周期解全局稳定的充分条件,同时得到在其它两种情况下周期解的不稳定性。文章所得结论推广了综合疾病管理中植物疾病模型的经典结论。 The plant disease model with economic threshold and human control strategy was studied. According to the three cases of a certain parameter, the existence of the unique positive periodic solution is analyzed and a sufficient condition for the global stability of the periodic solution under a certain range of the parameter is given by the qualitative theory. In the other two cases, The instability of the periodic solution. The conclusions drawn in the paper generalize the classical conclusion of a plant disease model in integrated disease management.