| 刘程程1, 孙海燕2, 张雯婷1, 储西平1,2, 明 亮1,2*.叶菌唑与4种杀菌剂复配对小麦赤霉病的毒力及防效[J].植物保护,2020,46(4):248-252. |
| 叶菌唑与4种杀菌剂复配对小麦赤霉病的毒力及防效 |
| Synergistic toxicity and field control effects of metconazole mixed with four fungicides against Fusarium graminearum on wheat |
| 投稿时间：2019-04-24 修订日期：2019-06-10 |
| DOI：10.16688/j.zwbh.2019211 |
| 中文关键词: 叶菌唑 咪鲜胺 戊唑醇 联合毒力 田间防效 |
| 英文关键词:metconazole prochloraz tebuconazole synergistic toxicity field control efficacy |
| 基金项目:国家重点研发计划（2018YFD0200500，2018YFD0200505） |
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| 中文摘要: |
| 采用菌丝生长速率法测定了叶菌唑分别与咪鲜胺、戊唑醇、丙硫菌唑和氟啶胺的几种不同配比复配剂对禾谷镰孢菌的室内联合毒力,并通过田间试验评价复配剂对小麦赤霉病的防效。结果表明,叶菌唑、咪鲜胺、戊唑醇、丙硫菌唑和氟啶胺对禾谷镰孢菌的有效抑制中浓度(EC50)分别为0.016 3~0.038 3、0.014 7、0.280 7、0.094 5、0.230 0 μg/mL,复配剂叶菌唑∶咪鲜胺1∶2和叶菌唑∶戊唑醇1∶1具有增效作用,SR值分别为1.540 5和1.515 3。按此比例制备了30%叶菌唑·咪鲜胺水乳剂和20%叶菌唑·戊唑醇悬浮剂用以进行田间防效试验,结果显示,这2个复配剂的田间防效均与用量呈正相关性,且一次防效均在65%以上,并且对小麦安全,这一结果表明叶菌唑与咪鲜胺、戊唑醇这2种不同作用机制的杀菌剂可以复配使用,大大延缓了小麦赤霉病菌抗药性的进一步加剧,为赤霉病的综合防控和抗药性治理提供依据,具有良好的市场开发前景。 |
| 英文摘要: |
| Toxicities of metconazole, prochloraz, tebuconazole, prothioconazole, fluazinam and their mixtures to Fusarium graminearum in wheat were detected by mycelial growth assay in vitro, and the control efficacy of mixtures to wheat head blight disease was evaluated in the field. The results showed that the EC50 values for metconazole, prochloraz, tebuconazole, prothioconazole and fluazinam were 0.016 3-0.038 3, 0.014 7, 0.280 7, 0.094 5 and 0.230 0 μg/mL, respectively. The mixtures of metconazole and prochloraz with the ratio of 1∶2, and metconazole and tebuconazole with the ratio of 1∶1 demonstrated synergistic inhibition effect, with the synergy ratio of 1.540 5 and 1.515 3, respectively. 30% metconazole and prochloraz emulsion in water and 20% metconazole and tebuconazole suspension concentrates were prepared at this proportion in field trials. The results showed that field control effects of the two compound agents were positively correlated with the dosage, with the efficacy over 65%. These fungicides were safe to wheat at the used dosages. The above results indicated that metconazole mixed with prochloraz or tebuconazole can be used to defer the resistance of wheat head blight disease, which provides the basis for comprehensive control and resistance management, and has good market development prospects. |
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