Temporal dynamics of Plasmopara viticola as function of bud load increase in 'Sauvignon Blanc'
The objective of this work was to evaluate the effect of increasing bud load per plant on epidemiological variables of downy mildew on 'Sauvignon Blanc'. The study was carried out in a commercial vineyard in a high-altitude region of the municipality of São Joaquim, in the state of Santa Catarina, Brazil, during the 2016/2017 and 2017/2018 vintages. The treatments consisted of four bud loads: 15, 30, 50, and 75 per vine. The maximum incidence, maximum severity, beginning of symptom appearance, time to reach maximum disease incidence and severity, area under the incidence and severity disease progress curve were determined. Increasing bud load over 50 per vine results in higher incidence and severity of downy mildew (Plasmopara viticola) in 'Sauvignon Blanc' leaves but does not influence the time to reach maximum disease incidence and severity. Increasing bud load over 50 per vine results in an increase in the area under the disease incidence and severity progress curve for downy mildew in 'Sauvignon Blanc' leaves. To adopt over 50 buds per vine treatment, it is necessary additional disease control measures, with an emphasis on integrated management to control downy mildew.
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Pesquisa Agropecuaria Brasileira
2024
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rev-pab-br-article-274712024-03-22T19:15:13Z Temporal dynamics of Plasmopara viticola as function of bud load increase in 'Sauvignon Blanc' Dinâmica temporal de Plasmopara viticola em função do aumento da carga de gemas em 'Sauvignon Blanc' Wurz, Douglas André Brighenti, Alberto Fontanella Allebrandt, Ricardo Rufato, Leo Vitis vinifera; integrated disease management; vine diseases; winter pruning Vitis vinifera; manejo integrado de doenças; doenças da videira; poda invernal The objective of this work was to evaluate the effect of increasing bud load per plant on epidemiological variables of downy mildew on 'Sauvignon Blanc'. The study was carried out in a commercial vineyard in a high-altitude region of the municipality of São Joaquim, in the state of Santa Catarina, Brazil, during the 2016/2017 and 2017/2018 vintages. The treatments consisted of four bud loads: 15, 30, 50, and 75 per vine. The maximum incidence, maximum severity, beginning of symptom appearance, time to reach maximum disease incidence and severity, area under the incidence and severity disease progress curve were determined. Increasing bud load over 50 per vine results in higher incidence and severity of downy mildew (Plasmopara viticola) in 'Sauvignon Blanc' leaves but does not influence the time to reach maximum disease incidence and severity. Increasing bud load over 50 per vine results in an increase in the area under the disease incidence and severity progress curve for downy mildew in 'Sauvignon Blanc' leaves. To adopt over 50 buds per vine treatment, it is necessary additional disease control measures, with an emphasis on integrated management to control downy mildew. O objetivo deste trabalho foi avaliar o efeito do aumento de carga de gemas por planta nas variáveis epidemiológicas de míldio em 'Sauvignon Blanc'. O estudo foi realizado em um vinhedo comercial em uma região de altitude do munícipio de São Joaquim, no estado de Santa Catarina, Brasil, durante as safras de 2016/2017 e 2017/2018. Os tratamentos consistiram em quatro cargas de gemas: 15, 30, 50 e 75 por videira. Incidência máxima, severidade máxima, início da aparição dos sintomas, tempo para alcançar a máxima incidência e severidade da doença, área abaixo da curva de progresso da incidência e abaixo da curva de progresso da severidade da doença foram determinados. O aumento da carga de gemas acima de 50 gemas por videira resulta em aumento da incidência e severidade de míldio (Plasmopara viticola) nas folhas de 'Sauvignon Blanc', mas não influencia o tempo para atingir a máxima incidência e severidade da doença. O aumento da carga de gemas acima de 50 por videira resulta em aumento da área abaixo da curva de progresso de incidência e severidade da doença para o míldio nas folhas de 'Sauvignon Blanc'. Para adotar o tratamento de mais de 50 gemas por videira, é necessário utilizar medidas adicionais de controle de doenças, com ênfase no manejo integrado para controle de míldio da videira. Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira 2024-03-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.sct.embrapa.br/index.php/pab/article/view/27471 Pesquisa Agropecuaria Brasileira; V.58, Jan./Dec., 2023: Publicação contínua em volume anual; e03224 Pesquisa Agropecuária Brasileira; V.58, Jan./Dec., 2023: Publicação contínua em volume anual; e03224 1678-3921 0100-104x eng https://seer.sct.embrapa.br/index.php/pab/article/view/27471/15220 Direitos autorais 2023 Pesquisa Agropecuária Brasileira |
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| author |
Wurz, Douglas André Brighenti, Alberto Fontanella Allebrandt, Ricardo Rufato, Leo |
| spellingShingle |
Wurz, Douglas André Brighenti, Alberto Fontanella Allebrandt, Ricardo Rufato, Leo Temporal dynamics of Plasmopara viticola as function of bud load increase in 'Sauvignon Blanc' |
| author_facet |
Wurz, Douglas André Brighenti, Alberto Fontanella Allebrandt, Ricardo Rufato, Leo |
| author_sort |
Wurz, Douglas André |
| title |
Temporal dynamics of Plasmopara viticola as function of bud load increase in 'Sauvignon Blanc' |
| title_short |
Temporal dynamics of Plasmopara viticola as function of bud load increase in 'Sauvignon Blanc' |
| title_full |
Temporal dynamics of Plasmopara viticola as function of bud load increase in 'Sauvignon Blanc' |
| title_fullStr |
Temporal dynamics of Plasmopara viticola as function of bud load increase in 'Sauvignon Blanc' |
| title_full_unstemmed |
Temporal dynamics of Plasmopara viticola as function of bud load increase in 'Sauvignon Blanc' |
| title_sort |
temporal dynamics of plasmopara viticola as function of bud load increase in 'sauvignon blanc' |
| description |
The objective of this work was to evaluate the effect of increasing bud load per plant on epidemiological variables of downy mildew on 'Sauvignon Blanc'. The study was carried out in a commercial vineyard in a high-altitude region of the municipality of São Joaquim, in the state of Santa Catarina, Brazil, during the 2016/2017 and 2017/2018 vintages. The treatments consisted of four bud loads: 15, 30, 50, and 75 per vine. The maximum incidence, maximum severity, beginning of symptom appearance, time to reach maximum disease incidence and severity, area under the incidence and severity disease progress curve were determined. Increasing bud load over 50 per vine results in higher incidence and severity of downy mildew (Plasmopara viticola) in 'Sauvignon Blanc' leaves but does not influence the time to reach maximum disease incidence and severity. Increasing bud load over 50 per vine results in an increase in the area under the disease incidence and severity progress curve for downy mildew in 'Sauvignon Blanc' leaves. To adopt over 50 buds per vine treatment, it is necessary additional disease control measures, with an emphasis on integrated management to control downy mildew. |
| publisher |
Pesquisa Agropecuaria Brasileira |
| publishDate |
2024 |
| url |
https://seer.sct.embrapa.br/index.php/pab/article/view/27471 |
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