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中国农学通报

中国农学通报 ›› 2018, Vol. 34 ›› Issue (20): 126-129.doi: 10.11924/j.issn.1000-6850.casb17070105

所属专题： 水稻

• 植物保护 农药 • 上一篇    下一篇

7种杀菌剂对稻瘟病菌和水稻纹枯病菌的室内毒力测定

张 玲,马文秀,任佐华,戴良英,刘二明   

  1. 湖南农业大学植物保护学院,湖南农业大学植物保护学院,湖南农业大学植物保护学院,湖南农业大学植物保护学院,湖南农业大学植物保护学院
  • 收稿日期:2017-07-20 修回日期:2018-06-22 接受日期:2017-10-25 出版日期:2018-07-13 发布日期:2018-07-13
  • 通讯作者: 刘二明
  • 基金资助:
    国家重点研发计划项目“粮食主产区主要病虫草害发生及其绿色防控关键技术”(2016YFD0300700)；湖南省“十二五”重点学科(0904)。

7 Fungicides: Indoor Toxicity Determination on Magnaporthe oryzae and Rhizoctonia solani

  • Received:2017-07-20 Revised:2018-06-22 Accepted:2017-10-25 Online:2018-07-13 Published:2018-07-13

摘要： 水稻稻瘟病和纹枯病是水稻上重要的真菌性病害，化学防治是其主要防控措施之一，本研究旨在通过室内毒力测定筛选对稻瘟病菌和水稻纹枯病菌毒力作用强的杀菌剂。采用菌丝生长速率法测定了7种杀菌剂制剂对水稻稻瘟病菌和纹枯病菌的室内毒力作用。测定结果表明，在3种琥珀酸脱氢酶抑制剂(SDHI)类杀菌剂制剂中，6.25% Fluindapyr（研发代号IR9792）EC对稻瘟病菌毒力作用最强，EC50为1.01 mg/L；在3 种甲氧基丙烯酸酯(Strobilurin)类的杀菌剂制剂中25%吡唑醚菌酯EC对稻瘟病菌毒力最高，EC50为0.01 mg/L；三唑硫酮类杀菌剂48%丙硫菌唑SC对稻瘟病菌的EC50为0.70 mg/L。对于纹枯病菌，琥珀酸脱氢酶抑制剂(SDHI)类的24%噻呋酰胺SC对纹枯病菌毒力最高，EC50为0.07 mg/L；甲氧基丙烯酸酯(Strobilurin)类的20%丁香菌酯SC对纹枯病菌的毒力强，EC50为0.52 mg/L；48%丙硫菌唑SC对纹枯病菌的EC50为1.19 mg/L。研究结果为上述杀菌剂的进一步开发和应用提供了一定的基础。

Abstract: Rice blast and sheath blight are very important fungal diseases in rice, and one of the main measures to control these diseases is chemical control. The paper aims to select the fungicides with strong toxicity against Magnaporthe oryzae and Rhizoctonia solani by indoor toxicity determination. The toxicity of 7 fungicidesagainstM. oryzae andR. solani wasdeterminedbythemycelialgrowthratemethodinthelaboratory.The results showed that: 6.25% Fluindapyr (codenamed IR9792) EC had the strongest toxicity with EC50 1.01 mg/L, against M. oryzae in the 3 succinate dehydrogenase inhibitor (SDHI) fungicides; 25% pyraclostrobin EC had the highest toxicity with EC50 0.01 mg/L in 3 kinds of Strobilurin fungicides against M. oryzae; the EC50 of 48% prothioconazole SC, a Triazole thione fungicide, against M. oryzae was 0.70 mg/L; to R. solani, 24% thifluzamide SC, a (SDHI) fungicide, had the highest toxicity with EC50 0.07 mg/L; the toxicity of 20% coumoxystrobin SC against R. solani was 0.52 mg/L; the EC50 of 48% prothioconazole SC against R. solani was 1.19 mg/L. These results provide a basis for further development and application of the above fungicides.