草地学报

草地学报 ›› 2016, Vol. 24 ›› Issue (1): 165-170.DOI: 10.11733/j.issn.1007-0435.2016.01.022

• 技术研发 • 上一篇    下一篇

不同杀菌剂及复配对苜蓿锈病的防治研究

雒富春1,2, 袁庆华1, 王瑜1   

  1. 1. 中国农业科学院北京畜牧兽医研究所, 北京 100193;
    2. 甘肃农业大学草业学院, 甘肃 兰州 730070
  • 收稿日期:2014-05-13 修回日期:2014-10-08 出版日期:2016-02-15 发布日期:2016-04-26
  • 通讯作者: 袁庆华
  • 作者简介:雒富春(1987-),男,甘肃靖远县人,硕士研究生,研究方向为苜蓿病害防治,E-mail:luofuchun001@163.com
  • 基金资助:

    农业行业专项(201303057);国家十二五支撑项目(2011BAD17B01)资助

Toxicity Test of Different Fungicides and Compound Formulations to Alfalfa Rust

LUO Fu-chun1,2, YUAN Qing-hua1, WANG Yu1   

  1. 1. Institute of Animal Science of CAAS, Beijing 100193, China;
    2. Pratacultural College of Gansu Agricultural University, Lanzhou, Gansu Province 730070, China
  • Received:2014-05-13 Revised:2014-10-08 Online:2016-02-15 Published:2016-04-26

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摘要：

为了筛选防治苜蓿(Medicago sativa)锈病有效单剂和复配组合,本试验采用盆栽喷雾法,测定了14种杀菌剂及5种复配剂对苜蓿锈菌的毒力,并比较不同复配的协同增效作用。结果表明:在单剂毒力测定中,苜蓿锈菌对嘧菌酯最敏感,EC50为1.8809mg·L-1;甲基硫菌灵的毒力最弱,EC50为747.0022mg·L-1。按照不同杀菌机理的药剂复配机理,嘧菌酯和戊唑醇复配中,1:9组合产生相加作用,其余比例复配均表现为增效作用,其中5:1增效作用最强,增效系数SR为4.9684;嘧菌酯和烯酰吗啉复配,协同增效作用最强的是以1:3组合,增效系数为5.1114,但二者以9:1复配时产生拮抗作用;嘧菌酯和代森锰锌复配,1:7复配组合增效系数SR为4.5757,协同增效作用比较明显。吡唑醚菌酯与苯醚甲环唑复配增效作用最强的是1:5复配组合,其增效系数SR为5.2276;与百菌清的复配,1:7复配组合增效作用最为明显,其增效系数SR为5.8058,因此,从单剂防效看嘧菌酯和吡唑醚菌酯效果最好,复配剂中,吡唑醚菌酯和百菌清以1:7防效最好。

关键词: 苜蓿锈病, 杀菌剂, 筛选, 复配, 毒力测定

Abstract:

In order to select effective fungicide for the control of alfalfa rust, 14 kinds of fungicides toxicity were measured using potted plant and spray method to study the synergitic effect, and 6 kinds of fungicides of mixed formulation were selected. The test results indicated that Azoxystrobin had the strongest toxicity to alfalfa rust and EC50 was 1.8809 mg·L-1, Thiophanate-methyl had the weakest toxicity and EC50 were 747.0022 mg·L-1. According to the different mechanisms of fungicides, the 1:9 formulation of Azoxystrobin mixed with Tebuconazole produced an additive effect, the 5:1 formulation had the strongest synergistic effect and efficiency coefficient was 4.9684. The 1:3 formulation of Azoxystrobin mixed with dimethomorph produced the strongest synergies and efficiency coefficient was 5.1114, but 9:1 formulation produced antagonism effect. The 1:7 formulation of Azoxystrobin mixed with mancozeb produced obvious synergies and efficiency coefficient was 4.5757. The 1:5 formulation of Pyraclostrobin mixed with difenoconazole produced the strongest synergy effect and efficiency coefficient was 5.2276. The 1:7 formulation of Pyraclostrobin mixed with chlorothalonil produced obvious effect and efficiency coefficient was 5.8058.

Key words: Alfalfa rust, Fungicide, Selecting, Mixture, Toxicity test

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