Integration between genetic and chemical control on the progress of Asian soybean rust and yield

Summa Phytopathologica Pub Date : 2020-09-01 DOI:10.1590/0100-5405/220951

D. Sacon, A. Netto, Michele Fochesatto, Francine Spitza Stefanski, A. Gallina, P. M. Milanesi, L. Borges

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引用次数: 2

Abstract

ABSTRACT The objective of this study was to evaluate the genetic control integrated to the chemical control of Asian soybean rust (ASR) and the effects of these measures on crop yield. The experiment was conducted in Erechim, Rio Grande do Sul State, Brazil, in 2016/17 and 2017/18 crop years, under a randomized block design, in a subdivided plot scheme (cultivars in the plots and fungicides in the subplots), with four replicates. The following cultivars were used: BMX Vanguarda (without ASR tolerance); TMG 7062; TMG 7262, and TMG 7161, tolerant to ASR (Inox™ Technology cultivars). The fungicides used were: T1) control (without application of fungicides); T2) azoxystrobin + benzovindiflupyr; T3) difenoconazole + cyproconazole; T4) trifloxystrobin + prothioconazole, and T5) epoxiconazole + fluxapyroxad + pyraclostrobin. Four fungicide applications were carried out at the V6, R1, R5.1 and R6 stages. During the experiment, for the calculation of the area under disease progress curve (AUDPC), disease severity was assessed at 7-day intervals in a random sample of 10 trifolia per plot. After harvest, yield components were determined: number of grains per plant, thousand grain weight (g), and yield (kg ha-1). In 2017/18 crop year, the fungicide difenoconazole + cyproconazole was not efficient for ASR control. The soybean cultivars TMG 7062, TMG 7161 and TMG 7261 delayed the disease progression; however, only TMG 7161 presented tolerance in the presence of the inoculum in 2016/17 and 2017/18 crop years. The association between chemical and genetic control is shown to be efficient for ASR control.

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亚洲大豆锈病进展与产量的遗传与化学综合防治

摘要本研究的目的是评估遗传控制与亚洲大豆锈病化学防治的结合，以及这些措施对作物产量的影响。该实验于2016/17年和2017/18年在巴西南里奥格兰德州的埃雷希姆进行，采用随机区组设计，在细分地块方案中（地块中的品种和子地块中的杀菌剂）进行，共四次重复。使用以下品种：BMX Vanguarda（无ASR耐受性）；TMG 7062；TMG 7262和TMG 7161，耐受ASR（Inox™ 技术品种）。使用的杀菌剂为：T1）对照（未施用杀菌剂）；T2）嘧菌酯+苯并长春二氟吡；T3）苯醚甲唑+环康唑；T4）三氟司琼+丙硫苄唑和T5）氟环唑+氟沙吡唑菌胺+吡唑菌酯。在V6、R1、R5.1和R6阶段进行了四次杀菌剂施用。在实验过程中，为了计算疾病进展曲线下面积（AUDPC），在每个地块10个三叶的随机样本中，每隔7天评估疾病严重程度。收获后，确定产量组成部分：单株粒数、千粒重（g）和产量（kg ha-1）。2017/18作物年，杀菌剂苯醚甲唑+环康唑对ASR的控制效果不佳。大豆品种TMG 7062、TMG 7161和TMG 7261延缓了疾病的进展；然而，在2016/17和2017/18作物年，只有TMG 7161在接种物的情况下表现出耐受性。化学控制和遗传控制之间的联系被证明对ASR控制是有效的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Summa Phytopathologica Agricultural and Biological Sciences-Plant Science

CiteScore

0.90

自引率

0.00%

发文量

期刊介绍： The Summa Phytopathologica is a publication of the São Paulo State Plant Pathology Association (APF), Botucatu SP. Summa Phytopathologica (SP) is dedicated to publishing technical and scientific articles that describe original research in the area of Plant Pathology that may contribute significantly to its progress. SP accepts papers written in Portuguese, English, or Spanish. Its abbreviated title, Summa Phytopathol., should be used in bibliographies, footnotes and bibliographical references and strips.