| 摘要: |
| 【目的】比较不同杀菌剂对烟草白粉病的室内毒力和田间药效，以筛选出适合于治疗烟草白粉病的杀菌剂。【方法】分别采用孢子萌发法和田间防效试验，研究30%醚菌酯悬浮剂、15%三唑酮可湿性粉剂、50％百菌清可湿性粉剂、50％退菌特可湿性粉剂、25％乙嘧酚悬浮剂和对照药剂70％甲基硫菌灵可湿性粉剂对烟草白粉病的室内毒力及田间防治效果。【结果】室内毒力测定结果和田间药效试验结果表明，30%醚菌酯悬浮剂对烟草白粉病菌孢子萌发的EC50为2.29 mg/L，其3 000倍液的防治效果可达84.29％；25%乙嘧酚悬浮剂对烟草白粉病菌孢子萌发的EC50为2.88 mg/L，其1 000倍液的防治效果可达81.57％；对照药剂75%甲基硫菌灵可湿性粉剂对烟草白粉病菌孢子萌发的EC50为15.49 mg/L，其1 000倍液的防治效果只有31.76％；其他杀菌剂的防治效果均低于醚菌酯和乙嘧酚，但高于对照药剂甲基硫菌灵。【结论】醚菌酯和乙嘧酚均能有效地防治烟草白粉病，且效果优于对照药剂甲基硫菌灵，为生产提供了更高效可供替代的化学药剂品种。 |
| 关键词: 烟草白粉病菌 毒力测定 田间防效 杀菌剂 |
| DOI： |
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| 基金项目:高等学校学科创新引智计划项目（B07049）；中国烟草有害生物普查项目（KJ-2010-04）；烟草白粉病菌致病力分化及其防治研究（110201002024 |
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| Toxicity and field control efficiency of different fungicides against Erysiphe cichoracearum DC |
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SONG Shuang,ZHANG Xin,LUO Jing,et al
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| Abstract: |
| 【Objective】The control effects of six fungicides against Erysiphe cichoracearum DC in tobacco field were tested,to determine the suitable fungicide for the treatment of tobacco mildew fungicide.【Method】Thespore germination method was used to determine the toxicities of kresoxim-methyl,three triadimefon,chlorothalonil,tuzet,ethyl-phenol and the control agent thiophonate-methyl to E.cichoracearum DC,and field trials were conducted to ascertain the effects of 30% kresoxim methyl,15% three triadimefon,50% chlorothalonil,50% tuzet,25% ethyl-phenol and the control agent (70% thiophonate-methyl) on pathogenicity.【Result】EC50 of kresoxim methyl against tobacco powdery mildew conidia germination was 2.29 mg/L,and the control effect of 3 000 times solution reached 84.29%.EC50 of ethyl-phenol against tobacco powdery mildew conidia germination was 2.88 mg/L,and the control effect of 1 000 times solution reached 81.57%.EC50 of the control reagent (thiophonate-methyl) against tobacco powdery mildew conidia germination was 15.49 mg/L,and the control effect of 1 000 times solution was only 31.76%.Other fungicides control effects were lower than kresoxim-methyl and ethyl-phenol,but higher than control drug thiophonate-methyl.【Conclusion】 According to the determined pathogen virulence results,kresoxim-methyl and ethyl-phenol can effectively inhibit E.cichoracearum DC. |
| Key words: Erysiphe cichoracearum DC toxicity test field trial bactericide |
