Crop Protection ( IF 2.8 ) Pub Date : 2021-10-07 , DOI: 10.1016/j.cropro.2021.105839 Franklin J. Machado 1 , Jhonatan P. Barro 1 , Cláudia V. Godoy 2 , Alfredo R. Dias 3 , Carlos A. Forcelini 4 , Carlos M. Utiamada 5 , Edson R. Andrade 6 , Fernando C. Juliatti 7 , José Fernando J. Grigolli 8 , Hercules D. Campos 9 , Ivan Pedro Araujo 10 , João Mauricio Trentini Roy 11 , José Nunes 12 , Luís Henrique C.P. da Silva 13 , Marcelo G. Canteri 14 , Marina Senger 15 , Mônica A. Müller 10 , Mônica C. Martins 16 , Mônica Paula Debortoli 17 , Silvânia H. Furlan 18
Soybean rust (SBR), caused by Phakopsora pachyrhizi, is controlled with sequential applications of commercial premixes containing two and, more recently, three site-specific fungicides. However, their efficacy has been reduced due to the development of fungicide resistance in the fungal population; hence the use of multi-site fungicides in tank mixing has been encouraged. In this work we used data from 45 uniform fungicide trials conducted across eight Brazilian states during three crop seasons (2014/15, 2015/16, and 2017/18) to identify scenarios when the practice of adding multi-site fungicides in commercial premixes was both technical- and cost-effective. Premixes of quinone outside inhibitor (QoI) + demethylation inhibitors (DMI) or succinate dehydrogenase inhibitors (SDHI) were applied alone, or tank mixed with multi-site fungicides. Three premixes (PICOxystrobin + CYPRoconazole, PYRAclostrobin + FLUXapyroxad and AZOXystrobin + BENZovindiflupyr) were tank mixed with one of three multi-site fungicides (+MANCozeb, +COPpeR oxychloride, and +ChLORothalonil). The benefits from tank mixing a multi-site tended to be highest for the least effective premix. Improvements in control efficacy (, percent point; p.p.) and yield response (, kg/ha) ranged from 3 to 15 p.p. and 58–240 kg/ha, respectively. The improvements in and were affected by severity in the non-treated check; significantly higher improvements in were determined in trials experiencing high SBR severity levels (>80%). The economic analysis for scenarios of soybean price and multi-site costs showed that the addition of +MANC, given its lower price, was more likely to be profitable compared with +CLOR and +COPR, particularly when tank mixed with the least effective commercial premix.
中文翻译:
罐混合现场特定的预混料和多位杀菌剂对于管理大豆锈病是否有效和经济?荟萃分析
大豆锈病 (SBR),由豆角锈病菌引起, 是通过连续施用含有两种和最近三种位点特定杀菌剂的商业预混物来控制的。然而,由于真菌种群中杀菌剂耐药性的发展,它们的功效已经降低。因此,鼓励在罐混合中使用多部位杀菌剂。在这项工作中,我们使用了在三个作物季节(2014/15、2015/16 和 2017/18)在巴西八个州进行的 45 项统一杀菌剂试验的数据,以确定在商业预混物中添加多位点杀菌剂的做法是兼具技术和成本效益。醌外抑制剂 (QoI) + 去甲基化抑制剂 (DMI) 或琥珀酸脱氢酶抑制剂 (SDHI) 的预混物单独使用,或与多位杀菌剂混合使用。三种预混剂(嘧菌酯 + CYPRoconazole,将唑菌胺酯 + FLUXapyroxad 和唑菌胺酯 + BENZovindiflupyr) 与三种多位点杀菌剂(+MANCozeb、+COPpeR oxychloride 和 +ChLORothalonil)中的一种进行罐混合。对于效果最差的预混料,罐式混合多站点的好处往往最高。控制功效的改进(, 百分点; pp) 和产量响应 (, kg/ha) 的范围分别为 3 到 15 pp 和 58–240 kg/ha。的改进 和 在未治疗的检查中受到严重程度的影响;显着提高在经历高 SBR 严重程度 (>80%) 的试验中确定。对大豆价格和多站点成本情景的经济分析表明,添加 +MANC,鉴于其较低的价格,与 +CLOR 和 +COPR 相比更有可能有利可图,尤其是当罐混与效率最低的商业预混料混合时.