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首页> 外文期刊>Scientia horticulturae >Effect of Y-trellis and vertical shoot positioning training systems on downy mildew and botrytis bunch rot of grape in highlands of southern Brazil
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Effect of Y-trellis and vertical shoot positioning training systems on downy mildew and botrytis bunch rot of grape in highlands of southern Brazil

机译：Y型格架和垂直芽定位训练系统对巴西南部高地葡萄的霜霉病和葡萄孢束腐烂的影响

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摘要

Downy mildew (Plasmopara viticola) and botrytis bunch rot (Botrytis cinerea) are important diseases in the highlands of Santa Catarina State, a relatively new wine-growing region in Brazil. Although it is known that training systems can affect microclimate and subsequent disease development, this has not been examined in the highlands of Brazil. Thus, the purpose of this study was to evaluate the influence of Y-trellis (YT) and vertical shoot positioning (VSP) training system on downy mildew and botrytis bunch rot disease development in 'Cabernet Sauvignon' cultivar. Experiments were carried out in commercial vineyards in sao Joaquim, SC Municipality, southern Brazil, during the year 2012-2013 and 2013-2014 growing seasons. Downy mildew incidence and severity were quantified weekly from the first symptoms appearance on leaves and botrytis bunch rot incidence was evaluated at harvest. Disease progress curves were constructed compared according to: (a) beginning of symptoms appearance; (b) time to maximum disease incidence and severity: (c) maximum disease incidence and severity; and (d) area under the incidence and severity disease progress curve. Results showed significant differences in downy mildew and botrytis bunch rot intensity among grape training systems, where VSP training system showed significantly lower area under the incidence and severity disease progress curve and intensity of downy mildew and botrytis bunch rot in both 2012-2013 and 2013-2014 growing seasons. Collectively, the results of this study suggest VSP training system should be recommended for grapevine production to reduce both downy mildew and botrytis bunch rot in the highlands regions of southern Brazil. (C) 2015 Elsevier B.V. All rights reserved.
机译：霜霉病（Plasmopara viticola）和葡萄孢（Botrytis cinerea）是圣卡塔琳娜州（Santa Catarina State）高地的重要疾病，圣卡塔琳娜州是巴西一个相对较新的葡萄种植区。尽管众所周知，训练系统会影响小气候和随后的疾病发展，但巴西高地尚未对此进行检查。因此，本研究的目的是评估Y型架和垂直枝条定位训练系统对'Cabernet Sauvignon'品种霜霉病和葡萄孢束腐病发展的影响。在2012-2013年和2013-2014年的生长季节中，在巴西南部圣保罗州圣若阿金的商业葡萄园中进行了试验。从出现在叶子上的最初症状每周对霜霉病的发生率和严重程度进行定量，并在收获时评估葡萄孢束腐烂的发生率。根据以下条件比较疾病进展曲线：（a）症状开始出现; （b）达到最大疾病发生率和严重程度的时间：（c）达到最大疾病发生率和严重程度的时间; （d）疾病发生率和严重性下的进展曲线面积。结果显示，在葡萄培训系统中，霜霉病和葡萄孢菌束腐烂强度存在显着差异，其中VSP培训系统在2012-2013年和2013-2013年的发病率和严重性疾病进展曲线下的面积显着降低，霜霉病和葡萄孢菌束腐烂的强度也大大降低。 2014生长季节。总体而言，这项研究的结果表明，应建议在葡萄生产中使用VSP培训系统，以减少巴西南部高地地区的霜霉病和葡萄孢束腐烂。 （C）2015 Elsevier B.V.保留所有权利。

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