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中国农学通报 ›› 2020, Vol. 36 ›› Issue (36): 113-117.doi: 10.11924/j.issn.1000-6850.casb20200100020

所属专题: 水稻

• 植物保护·农药 • 上一篇    下一篇

戊唑醇与嘧菌酯复配对稻瘟病和水稻纹枯病的联合毒力及田间防效

傅宇航(), 马慧, 李娟, 彭复蓉, 毕朝位()   

  1. 西南大学植物保护学院,重庆 400715
  • 收稿日期:2020-01-08 修回日期:2020-02-13 出版日期:2020-12-25 发布日期:2020-12-23
  • 通讯作者: 毕朝位
  • 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: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,Tel:15520053051,E-mail: 1047223522@qq.com
  • 基金资助:
    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”(2018YFD0200300);中央高校基本科研业务费专项资金“稻瘟病菌对吡唑醚菌酯抗性的分子机制”(XDJK2017B026)

Mixtures of Tebuconazole and Azoxystrobin: Indoor Toxicity and Field Control Effects on Rice Blast and Rice Sheath Blight

Fu Yuhang(), Ma Hui, Li Juan, Peng Furong, Bi Chaowei()   

  1. College of Plant Protection, Southwest University, Chongqing 400715
  • Received:2020-01-08 Revised:2020-02-13 Online:2020-12-25 Published:2020-12-23
  • Contact: Bi Chaowei

摘要:

为了筛选防治稻瘟病和水稻纹枯病的高效药剂,采用菌丝生长抑制法测定戊唑醇、嘧菌酯单剂及其5种配比对稻瘟病菌和水稻纹枯病菌的毒力,通过田间药效试验评价增效剂的田间防效。室内毒力测定结果表明:戊唑醇与嘧菌酯质量比2:1时,对水稻稻瘟病菌和水稻纹枯病菌的生长抑制具有增效作用,增效系数(SR)分别为1.5777、1.5941。田间试验结果表明:戊唑醇与嘧菌酯复配质量比2:1使用剂量90~135 g a.i./hm2时,对稻瘟病防效达76.68%~91.12%,对水稻纹枯病防效达81.28%~90.32%,与单剂和对照药剂相比防治效果相当或更好,并且用药量更低。本研究结果表明,戊唑醇与嘧菌酯质量比2:1复配用于防治水稻稻瘟病和水稻纹枯病,可以达到农药减量增效的目的。

关键词: 水稻稻瘟病, 水稻纹枯病, 戊唑醇, 嘧菌酯, 复配药剂

Abstract:

To select efficient fungicides to control rice blast and rice sheath blight, the mycelium growth inhibitory method was used to determine the virulence of tebuconazole and azoxystrobin and their 5 matching ratios to Pyricularia oryzae and Rhizoctonia solani, a field test was also used to determine the control efficacy of the synergist. The results of indoor toxicity determination showed that when the ratio of tebuconazole to azoxystrobin was 2:1, it had synergistic effect on Pyricularia oryzae and Rhizoctonia solani, and the synergistic ratio was 1.5777 and 1.5941, respectively. The results of field tests showed that the control efficacy against rice blast and rice sheath blight was 76.68%-91.12% and 81.28%-90.32% respectively when the ratio of tebuconazole and azoxystrobin was 2:1 at the dosage of 90-135 g a.i./hm2. The synergist had equivalent or better control efficacy and the dosage was lower compared with single and control fungicides. The results indicate that the ratio of tebuconazole and azoxystrobin 2:1 as an effective agent for controlling rice blast and rice sheath blight could reduce the use of fungicides application and increase efficiency.

Key words: rice blast, rice sheath blight, tebuconazole, azoxystrobin, fungicide combination

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