中国水稻科学

中国水稻科学

• 研究简报 • 上一篇    下一篇

黑龙江稻瘟病菌对三环唑抗药性研究

黄春艳;郭 梅;商世吉;李 桦   

  1. 黑龙江省农业科学院植物保护研究所， 哈尔滨 150086
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1999-01-10 发布日期:1999-01-10

Tolerance of Rice Blast to Tricyclazole in Heilongjiang Province

Huang Chunyan; Guo Mei; Shang Shiji; Li Hua   

  • Received:1900-01-01 Revised:1900-01-01 Online:1999-01-10 Published:1999-01-10

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被引次数

57

摘要： 采用室内抑菌试验方法，对来自黑龙江省不同地区160份稻瘟病标样中的98个纯菌株进行抗药性测定。结果表明，三环唑对不同地区稻瘟病菌的平均抑制中浓度(EC50)有很大差异。敏感菌株的平均抑制中浓度，哈尔滨菌株为10～20 mg/kg，牡丹江菌株为20～40 mg/kg，佳木斯和绥化菌株均接近50 mg/kg，国营农场的菌株接近40 mg/kg，抗性菌株平均抑制中浓度均大于50 mg/kg。本试验结果说明，黑龙江省大部分稻区的稻瘟病菌对三环唑已产生一定的抗性。抗性菌株抑制中浓度大约是敏感菌株的1.25～5倍。

关键词: 稻瘟病菌, 抗药性, 抑制, 杀菌剂

Abstract: Investigation of tolarance to Tricyclazole in rice blast (Magnaporthe grisea, Anamorph: Pyricularia grisea) from major rice cultivation regions of Heilongjiang province in 1995-1997 showed that the resistant isolates were found in many areas. The average EC50 of Tricyclazole to sensitive isolates in the regions of Harbin, Mudanjiang, Jiamusi, Suihua and some state farms were 10-20 mg/kg, 20-40 mg/kg, 50 mg/kg, 50 mg/kg, 40 mg/kg respectively. The average EC50 of resistant isolates were all far surpass 50 mg/kg. The average EC50 of resistant isolates to Tricyclazole is about 1. 25-5 times to sensitive ones.

Key words: rice blast, fungicide, fungicide tolerance, inhibition