[目的]为开发新型高效的植物源杀菌剂,通过室内盆栽试验、田间小区试验对0.1%异补骨脂查耳酮乳油防治水稻稻瘟病的效果进行初步研究。[结果]室内盆栽试验发现:0.1%异补骨脂查耳酮乳油的含量为1.25、2.5、5 g/L时,对水稻稻瘟病的防效分别为43.37%、61.93%、93.03%,其防治效果好于40%稻瘟灵乳油;田间试验结果表明:0.1%异补骨脂查耳酮乳油田间剂量为0.3、0.45、0.6 g a.i./hm2时,其防效分别为78.61%、80.10%、91.58%。[结论]0.1%异补骨脂查耳酮乳油是一种很有潜力的防治水稻稻瘟病的植物杀菌剂。 [Objective] The purpose of the research was to develop a new type of highly efficient fungicide for plant fungicide. The effects of 0.1% isopsoralulose and chalcone cream on controlling rice blast were studied through field pot experiment and field plot experiment. [Result] The results of indoor pot experiment showed that the control effects of 0.1% isoprenoid chalcone EC on rice blast were 43.37%, 61.93% and 93.03% respectively at 1.25, 2.5 and 5 g / L, The control effect was better than that of 40% rice blast blasting oil. The field test results showed that the control efficacy of 0.1% isoprocroliferative chalcone cream was 0.3%, 0.45% and 0.6% ai / hm2 respectively, and the control effects were 78.61% and 80.10% , 91.58%. [Conclusion] 0.1% isopsoralen chalcone oil is a potential plant fungicide for controlling rice blast.