任学祥, 苏贤岩, 范富云, 王友定, 迟雨, 李钊, 叶正和. 吡唑醚菌酯在小麦不同生育期病害防治中的应用[J]. 农药学学报, 2023, 25(1): 89-96. DOI: 10.16801/j.issn.1008-7303.2022.0145
    引用本文: 任学祥, 苏贤岩, 范富云, 王友定, 迟雨, 李钊, 叶正和. 吡唑醚菌酯在小麦不同生育期病害防治中的应用[J]. 农药学学报, 2023, 25(1): 89-96. DOI: 10.16801/j.issn.1008-7303.2022.0145
    REN Xuexiang, SU Xianyan, FAN Fuyun, WANG Youding, CHI Yu, LI Zhao, YE Zhenghe. Application of pyraclostrobin in disease control of wheat at different growth stages[J]. Chinese Journal of Pesticide Science, 2023, 25(1): 89-96. DOI: 10.16801/j.issn.1008-7303.2022.0145
    Citation: REN Xuexiang, SU Xianyan, FAN Fuyun, WANG Youding, CHI Yu, LI Zhao, YE Zhenghe. Application of pyraclostrobin in disease control of wheat at different growth stages[J]. Chinese Journal of Pesticide Science, 2023, 25(1): 89-96. DOI: 10.16801/j.issn.1008-7303.2022.0145

    吡唑醚菌酯在小麦不同生育期病害防治中的应用

    Application of pyraclostrobin in disease control of wheat at different growth stages

    • 摘要: 为探讨吡唑醚菌酯对小麦不同生育期病害的防治效果,采用菌丝生长速率法,测定了吡唑醚菌酯对小麦纹枯病菌Rhizoctonia cerealis、根腐病菌Bipolaris sorokiniana、全蚀病菌Gaeumannomyces tritici及赤霉病菌Gibberella zeae的室内抑制活性;通过种子发芽盒试验,测定了吡唑醚菌酯不同药种比包衣处理对小麦种子发芽的影响;采用菌土混合法,测定了5%吡唑醚菌酯种子处理悬浮剂 (FS) 对小麦纹枯病的盆栽防效;同时测定了5%吡唑醚菌酯悬浮剂 (SC) 对小麦白粉病、锈病及赤霉病的田间防效。结果表明:吡唑醚菌酯对小麦纹枯病菌、根腐病菌、全蚀病菌和赤霉病菌的EC50值分别为0.404、5.862、0.193和1.372 mg/L。25 ℃条件下,5%吡唑醚菌酯FS不同药种比对济麦22鲜重及干重均有一定的促进作用;10 ℃下,对小麦种子发芽势、发芽率、发芽指数及活力指数均显示出一定的促进作用。5%吡唑醚菌酯FS苗后20 d对小麦纹枯病的防效在74%以上,药种比1∶50时防效达99.02%;5%吡唑醚菌酯SC按 3000 mL/hm2剂量于扬花初期及盛花期各施药1次,对田间小麦白粉病、锈病及赤霉病的防效分别为100%、100%和75.87%。研究表明,吡唑醚菌酯对小麦不同生育期病害具有很好的防治效果。

       

      Abstract: In order to explore the feasibility of pyraclostrobin in preventing diseases of wheat at different growth stages, the virulences of pyraclostrobin against the causal agents of wheat sheath blight (Rhizoctonia cerealis), root rot (Bipolaris sorokiniana), total rot (Gaeumannomyces tritici), and head blight (Gibberella zeae) were determined by the mycelial growth rate method. Using the seed germination test, the effect of different concentrations of pyraclostrobin coating on wheat seed germination was determined. The control effects of pyraclostrobin 5% FS on wheat sheath blight in pots were determined by the bacteria-soil mixing method and the field control effects of pyraclostrobin 5% SC against R. cerealis, B. sorokiniana, G. tritici, and G. zeae were also determined. The results showed that the EC50 value of pyraclostrobin against R. cerealis, B. sorokiniana, G. tritici, and G. zeae were 0.404, 5.862, 0.193, and 1.372 mg/L, respectively. Different coating ratios of pyraclostrobin 5% FS had a certain promotion effect on the fresh weight and dry weight of Jimai 22 under the condition of 25 ℃ and showed a certain promotion effect on the germination potential, germination rate, germination index, and vigor index of wheat seeds under the condition of 10 ℃. The pot experiment showed that pyraclostrobin 5% FS had a control efficacy of more than 74% on wheat sheath blight 20 days after seedling, and the control efficacy reached 99.02% when the coating ratio was 1∶50. The control efficacies of pyraclostrobin 5% SC on wheat powdery mildew, rust and scab were 100%, 100%, and 75.87% respectively under the dose of 3000 mL/hm2 with two sprays during early flowering and full flowering periods. The research showed that pyraclostrobin can be well applied to the control of wheat diseases in different growth stages.

       

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