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农学学报 ›› 2021, Vol. 11 ›› Issue (5): 18-21.doi: 10.11923/j.issn.2095-4050.cjas20191200323

所属专题: 水稻

• 植物保护 • 上一篇    下一篇

水稻稻曲病有效药剂筛选及药效评价

傅宇航(), 马慧, 蔡俊松, 彭复蓉, 毕朝位()   

  1. 西南大学 植物保护学院,重庆 400715
  • 收稿日期:2019-12-28 修回日期:2020-02-08 出版日期:2021-05-20 发布日期:2021-06-29
  • 通讯作者: 毕朝位 E-mail:1047223522@qq.com;chwbi@swu.edu.cn
  • 作者简介:傅宇航,男,1994年出生,重庆万盛人,硕士研究生,研究方向为真菌病害抗药性。通信地址:400715 重庆市北碚区天生路西南大学植物保护学院,E-mail: 1047223522@qq.com
  • 基金资助:
    科技部国家重点研发计划“华南及西南水稻化肥农药减施技术集成研究与示范(2018-2020)”(2018YFD0200300)

Screening and Evaluation of Fungicides for Control of Rice False Smut Caused by Ustilaginoidea virens

Fu Yuhang(), Ma Hui, Cai Junsong, Peng Furong, Bi Chaowei()   

  1. College of Plant Protection, Southwest University, Chongqing 400715, China
  • Received:2019-12-28 Revised:2020-02-08 Online:2021-05-20 Published:2021-06-29
  • Contact: Bi Chaowei E-mail:1047223522@qq.com;chwbi@swu.edu.cn

摘要:

通过对水稻稻曲病进行室内毒力测定与田间药效试验,筛选出防治效果较好的杀菌剂。采用菌丝生长速率法测定9种杀菌剂对水稻稻曲病菌的室内毒力,并进行7种杀菌剂的田间药效试验。氟环唑、吡唑醚菌酯、丙硫菌唑、嘧菌酯、丙环唑、咪鲜胺、戊唑醇的EC50值小于0.20 μg/mL,抑菌效果较好。田间药效试验中,430 g/L戊唑醇SC 96.75 g a.i./hm2、125 g/L氟环唑SC 84.4 g a.i./hm2、250 g/L嘧菌酯SC 225.0 g a.i./hm2的防效最好,防效分别为83.59%、82.77%、81.13%。戊唑醇、氟环唑和嘧菌酯对水稻稻曲病具有良好的防效,可作为该病的有效防治药剂。

关键词: 稻曲病, 稻曲病菌, 杀菌剂, 室内毒力, 田间防效

Abstract:

The study aims to screen out effective fungicides against rice false smut (caused by Ustilaginoidea virens) by indoor toxicity determination and field efficacy trial. Indoor toxicities of 9 fungicides against U. viren were tested by using mycelium growth rate method, and the control effects of 7 fungicides on rice false smut were detect in field trials. Indoor toxicity data revealed that epoxiconazole, pyraclostrobin, prothioconazole, azoxystrobin, propiconazole, prochloraz and tebuconazole had obvious inhibitory effect with EC50 value of less than 0.20 μg/mL. Field trial results demonstrated that 430 g/L tebuconazole SC of 96.75 g a.i./hm2, 125 g/L epoxiconazole SC of 84.4 g a.i./hm2, 250 g/L azoxystrobin SC of 225.0 g a.i./hm2had excellent control effect of 83.59%, 82.77%, 81.13%, respectively. Therefore, tebuconazole, epoxiconazole and azoxystrobin are ideal fungicides for controlling rice false smut, and could be recommended to application in field.

Key words: Rice False Smut, Ustilaginoidea Virens, Fungicides, Toxicity Test, Field Control Effect

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