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Evaluation of pyraclostrobin as a management tool of Groundnut ringspot virus in peanut crop
Phytoparasitica ( IF 1.5 ) Pub Date : 2020-08-06 , DOI: 10.1007/s12600-020-00836-1
Marcos Doniseti Michelotto , Rita de Cássia Pereira-Carvalho , Luciane de Nazaré Almeida dos Reis , Leonardo Silva Boiteux , Willians César Carrega , Luis Eduardo Prado Lamana , Ignácio José de Godoy

Yield losses due to Groundnut ringspot virus – GRSV (genus Orthotospovirus) infection have been observed across major peanut (Arachis hypogaea L.) growing areas in Brazil. However, effective management systems capable of minimizing GRSV damage are not yet available. The aim of the present study was to verify the effectiveness of the pyraclostrobin (a strobilurin fungicide reported as a potential activator of natural, large–spectrum plant defense mechanisms) in the management of GRSV in peanuts. Two independent field experiments were carried out in commercial peanut areas with a natural occurrence of GRSV. A completely randomized block design was used with a 5 × 2 factorial scheme, including four replicates, five peanut cultivars (‘Runner IAC 886’, ‘IAC OL4’, ‘IAC 503’, ‘IAC 505’, and ‘Granoleico’) and two treatments (with and without pyraclostrobin application). At 80 and 100 days after sowing, visual disease severity scores and the number of infected plants were evaluated, followed by virus quantification in the leaf tissues and yield. The cultivars ‘Granoleico’ and ‘IAC 503’ displayed the highest levels of GRSV susceptibility. Pyraclostrobin was found to be effective in reducing the number of GRSV–infected plants, as well as in attenuating disease severity. In addition, pyraclostrobin was able to promote significant yield increase. Even though the mechanism(s) of pyraclostrobin action against GRSV remain elusive, this fungicide can be regarded as a potential component for viral disease management programs in peanuts.

中文翻译:

唑菌胺酯作为花生作物落花生环斑病毒管理工具的评价

在巴西的主要花生 (Arachis hypogaea L.) 种植区,已观察到花生环斑病毒 - GRSV(正孢病毒属)感染导致的产量损失。然而,目前还没有能够最大限度地减少 GRSV 损害的有效管理系统。本研究的目的是验证唑菌胺酯(据报道是一种天然、大谱植物防御机制的潜在激活剂)在花生 GRSV 管理中的有效性。在自然发生 GRSV 的商业花生区进行了两个独立的田间试验。完全随机区组设计采用 5 × 2 因子方案,包括四个重复、五个花生品种('Runner IAC 886'、'IAC OL4'、'IAC 503'、'IAC 505'、和“Granoleico”)和两种处理(使用和不使用唑菌胺酯)。在播种后 80 天和 100 天,评估视觉疾病严重程度评分和受感染植物的数量,然后对叶组织中的病毒和产量进行量化。栽培品种“Granoleico”和“IAC 503”显示出最高水平的 GRSV 易感性。发现唑菌胺酯可有效减少受 GRSV 感染的植物数量,以及减轻疾病的严重程度。此外,唑菌胺酯能够促进显着的产量增加。尽管唑菌胺酯对 GRSV 的作用机制仍然难以捉摸,但这种杀菌剂可被视为花生病毒病管理计划的潜在组成部分。评估了视觉疾病严重程度评分和受感染植物的数量,然后对叶组织中的病毒和产量进行了量化。栽培品种“Granoleico”和“IAC 503”显示出最高水平的 GRSV 易感性。发现唑菌胺酯可有效减少受 GRSV 感染的植物数量,以及减轻疾病的严重程度。此外,唑菌胺酯能够促进显着的产量增加。尽管唑菌胺酯对 GRSV 的作用机制仍然难以捉摸,但这种杀菌剂可被视为花生病毒病管理计划的潜在组成部分。评估了视觉疾病严重程度评分和受感染植物的数量,然后对叶组织中的病毒和产量进行了量化。栽培品种“Granoleico”和“IAC 503”显示出最高水平的 GRSV 易感性。发现唑菌胺酯可有效减少受 GRSV 感染的植物数量,以及减轻疾病的严重程度。此外,唑菌胺酯能够促进显着的产量增加。尽管唑菌胺酯对 GRSV 的作用机制仍然难以捉摸,但这种杀菌剂可被视为花生病毒病管理计划的潜在组成部分。发现唑菌胺酯可有效减少受 GRSV 感染的植物数量,以及减轻疾病的严重程度。此外,唑菌胺酯能够促进显着的产量增加。尽管唑菌胺酯对 GRSV 的作用机制仍然难以捉摸,但这种杀菌剂可被视为花生病毒病管理计划的潜在组成部分。发现唑菌胺酯可有效减少受 GRSV 感染的植物数量,以及减轻疾病的严重程度。此外,唑菌胺酯能够促进显着的产量增加。尽管唑菌胺酯对 GRSV 的作用机制仍然难以捉摸,但这种杀菌剂可被视为花生病毒病管理计划的潜在组成部分。
更新日期:2020-08-06
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