河南农业科学 ›› 2021, Vol. 50 ›› Issue (9): 96-104.DOI: 10.15933/j.cnki.1004-3268.2021.09.012

• 植物保护 • 上一篇    下一篇

木霉菌与杀菌剂联合使用对水稻纹枯病菌的抑制效果

张亚玲,唐雪婷,王兵,候钰煊,赵羽涵,靳学慧   

  1. (黑龙江八一农垦大学/黑龙江省植物抗性研究中心/黑龙江省作物-有害生物互作生物学及生态防控重点实验室,黑龙江大庆163319)
  • 收稿日期:2021-03-20 出版日期:2021-09-15 发布日期:2021-10-13
  • 作者简介:张亚玲(1977-),女,黑龙江望奎人,副教授,博士,主要从事植物-病原物互作相关研究。E-mail:byndzyl@163.com
  • 基金资助:
    国家自然科学基金项目(U20A2025);黑龙江省自然科学基金项目(QC2011C046);黑龙江省农垦总局科技攻关项目(HKKYZD190205);黑龙江八一农垦大学校级科研启动项目(XDB201802,XDB-2016-05)

Inhibitory Effect of Combined Use of Trichoderma and Fungicides on Rhizoctonia solani in Rice

ZHANG Yaling,TANG Xueting,WANG Bing,HOU Yuxuan,ZHAO Yuhan,JIN Xuehui   

  1. (1Heilongjiang Bayi Agricultural University/Research Center of Plant Resistance in Heilongjiang/Heilongjiang Provincial
    Key Laboratory of Crop⁃Pest Interaction Biology and Ecological Control,Daqing 163319,China)
  • Received:2021-03-20 Published:2021-09-15 Online:2021-10-13

摘要: 为明确杀菌剂与木霉菌联合使用对水稻纹枯病菌(Rhizoctonia solani)的抑制作用,采用生长速率法和对峙培养法研究了4种常用化学杀菌剂(20%丙环唑乳油、25%嘧菌酯悬浮剂、20%噻唑锌悬浮剂、125 g/L氟环唑悬浮剂)和3种木霉菌(哈茨木霉菌HZT-1、长枝木霉菌CZT-2、绿色木霉菌LZT-3)及其联合使用对水稻纹枯病菌菌丝生长的抑制效果。结果表明,4种化学杀菌剂对水稻纹枯病菌的EC50值从小到大依次为25% 嘧菌酯(0.001 4 μg/mL)、20% 丙环唑(0.003 7 μg/mL)、125 g/L 氟环唑(0.222 0 μg/mL)、20%噻唑锌(20.750 0 μg/mL);3种木霉菌对水稻纹枯病菌的抑制率从低到高依次为哈茨木霉菌HZT-1(53.54%)、绿色木霉菌LZT-3(76.45%)、长枝木霉菌CZT-2(93.25%)。通过化学杀菌剂对木霉菌的EC50值与该化学杀菌剂对R. solani 的EC50值的比值(VEC50)分析,25%嘧菌酯、20%噻唑锌与3种木霉菌的VEC50均大于1,相容性好,可与木霉菌联合使用;通过协同系数(S)分析联合使用后的增效作用,绿色木霉LZT-3、长枝木霉CZT-2与25%嘧菌酯(质量浓度≥1.25 μg/mL)、20%噻唑锌(质量浓度≥10 μg/mL)联合使用S值均大于1,哈茨木霉菌HZT-1与高质量浓度25%嘧菌酯(质量浓度≥2.5 μg/mL)、20%噻唑锌(质量浓度≥20 μg/mL)联合使用S值大于1。因此,长枝木霉CZT-2、绿色木霉LZT-3可以与嘧菌酯、噻唑锌联合使用防治水稻纹枯病。

关键词: 木霉菌, 水稻纹枯病菌, 杀菌剂, 相容性, 协同系数, 增效作用

Abstract: To clarify the inhibitory effect of Trichoderma stains combined with fungicides on mycelium growth of the pathogen of rice sheath blight(Rhizoctonia solani),growth rate method and confrontation training method were used to test four chemical fungicide agents(20% propiconazole EC,25% azoxystrobin SC,20% zinc⁃thiazole SC,125 g/L epoxiconazol SC) and three Trichoderma stains(Trichoderma harzianum HZT⁃1,Trichoderma longibrachiatum CZT⁃2,Trichoderma viride LZT⁃3).The results showed that according to the EC50,four fungicides from low to high were 25% azoxystrobin(SC)(0. 001 4 μg/mL),20% propiconazole(EC)(0. 003 7 μg/mL),125 g/L fluorcloazole(0. 222 0 μg/mL)and 20% zinc⁃thiazole (20. 750 0 μg/mL). According to the inhibition rate on R. solani,three Trichoderma strains from low to high were T.harzianum HZT⁃1(53. 54%),T.viride LZT⁃3(76. 45%),T.longibrachiatum CZT⁃2(93. 25%). By analysis of the ratio(VEC50) of the EC50 of fungicides to Trichoderma and the EC50 of the fungicides to R. solani,the values of VEC50 of 25% azoxystrobin and 20% zinc⁃thiazole to three Trichoderma strains were all greater than 1. showing that they had high compatibility,and could be used in combination. Through analyzing synergism by synergy coefficient(S)after combined use,the synergy coefficient(S)was greater than 1 of T. longibrachiatum CZT⁃2 and T.viride LZT⁃3 with 25% azoxystrobin(concentration≥1. 25 μg/mL)and 20% zinc⁃thiazole(concentration≥10 μg/mL). The synergy coefficient (S) was greater than 1 of T. harzianum HZT⁃1 with high concentration of 25% azoxystrobin(concentration≥2. 5 μg/mL)and 20% zinc⁃thiazole(concentration≥20μg/mL).Therefore,T.longibrachiatum CZT⁃2 and T. viride LZT⁃3 can be combined with azoxystrobin and zinc⁃thiazole to control rice sheath blight.

Key words: Rhizoctonia solani, Trichoderma, Fungicide, Compatibility, Synergy coefficient, Synergism

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