Aerial spraying for downy mildew control in grapevines using a remotely piloted aircraft
Downy mildew is a major problem for grape growers, as this disease is difficult to control. Synthetic fungicides are used to treat downy mildew with handheld backpack and tractor sprayer applications, with high chemical exposure by operators. As important tools for maximising yield, application tec...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Eduem (Editora da Universidade Estadual de Maringá)
2024-04-01
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| Series: | Acta Scientiarum: Agronomy |
| Subjects: | |
| Online Access: | https://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/66613 |
| _version_ | 1797224514949480448 |
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| author | Laise de Souza de Oliveira Chaiane Renata Grigolo Rafael Henrique Pertille Alcir José Modolo José Ricardo da Rocha Campos Adão Robson Elias Idemir Citadin |
| author_facet | Laise de Souza de Oliveira Chaiane Renata Grigolo Rafael Henrique Pertille Alcir José Modolo José Ricardo da Rocha Campos Adão Robson Elias Idemir Citadin |
| author_sort | Laise de Souza de Oliveira |
| collection | DOAJ |
| description |
Downy mildew is a major problem for grape growers, as this disease is difficult to control. Synthetic fungicides are used to treat downy mildew with handheld backpack and tractor sprayer applications, with high chemical exposure by operators. As important tools for maximising yield, application technologies must be studied to optimise control efficiency. The objective of this study was to evaluate the efficiency of fungicide spray application using Remotely Piloted Aircraft (RPA) for the control of downy mildew in grapevine, with different spray volumes. The study was divided into two experiments using 4 vine lines, 10 blocks and 5 treatments with different mixture volumes: Experiment 1 with RPA application of 5 mixture volumes - 0, 22, 44, 66, and 88 L ha−1; Experiment 2 with RPA application of 3 mixture volumes - 44, 66, and 88 L ha−1 and a backpack application of one mixture volume - 800 L ha−1. Coverage percentage, droplet density and volume median diameter (VMD) were evaluated. Downy mildew severity on grapevine leaves was assessed using visual analysis and a diagrammatic scale. The application of 44 L ha−1 provided the greatest coverage and droplet density in the upper and middle strata; however, the backpack application had a better droplet distribution than the RPA application. Treatments of 44 L ha−1 with RPA and backpack application (800 L ha−1) provided the best disease control. In the trellis system, RPA application must be improved because of the low coverage in the lower parts of the plant, and further studies with different spray nozzles and application heights are needed.
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| first_indexed | 2024-04-24T13:54:20Z |
| format | Article |
| id | doaj.art-0f701202af5b45fda93ea4605959bdf2 |
| institution | Directory Open Access Journal |
| issn | 1679-9275 1807-8621 |
| language | English |
| last_indexed | 2024-04-24T13:54:20Z |
| publishDate | 2024-04-01 |
| publisher | Eduem (Editora da Universidade Estadual de Maringá) |
| record_format | Article |
| series | Acta Scientiarum: Agronomy |
| spelling | doaj.art-0f701202af5b45fda93ea4605959bdf22024-04-03T18:02:18ZengEduem (Editora da Universidade Estadual de Maringá)Acta Scientiarum: Agronomy1679-92751807-86212024-04-0146110.4025/actasciagron.v46i1.66613Aerial spraying for downy mildew control in grapevines using a remotely piloted aircraftLaise de Souza de Oliveira0Chaiane Renata Grigolo1Rafael Henrique Pertille2Alcir José Modolo3José Ricardo da Rocha Campos4Adão Robson Elias5Idemir Citadin6Universidade Tecnológica Federal do ParanáUniversidade Tecnológica Federal do ParanáUniversidade Tecnológica Federal do ParanáUniversidade Tecnológica Federal do ParanáUniversidade Tecnológica Federal do ParanáUniversidade Tecnológica Federal do ParanáUniversidade Tecnológica Federal do Paraná Downy mildew is a major problem for grape growers, as this disease is difficult to control. Synthetic fungicides are used to treat downy mildew with handheld backpack and tractor sprayer applications, with high chemical exposure by operators. As important tools for maximising yield, application technologies must be studied to optimise control efficiency. The objective of this study was to evaluate the efficiency of fungicide spray application using Remotely Piloted Aircraft (RPA) for the control of downy mildew in grapevine, with different spray volumes. The study was divided into two experiments using 4 vine lines, 10 blocks and 5 treatments with different mixture volumes: Experiment 1 with RPA application of 5 mixture volumes - 0, 22, 44, 66, and 88 L ha−1; Experiment 2 with RPA application of 3 mixture volumes - 44, 66, and 88 L ha−1 and a backpack application of one mixture volume - 800 L ha−1. Coverage percentage, droplet density and volume median diameter (VMD) were evaluated. Downy mildew severity on grapevine leaves was assessed using visual analysis and a diagrammatic scale. The application of 44 L ha−1 provided the greatest coverage and droplet density in the upper and middle strata; however, the backpack application had a better droplet distribution than the RPA application. Treatments of 44 L ha−1 with RPA and backpack application (800 L ha−1) provided the best disease control. In the trellis system, RPA application must be improved because of the low coverage in the lower parts of the plant, and further studies with different spray nozzles and application heights are needed. https://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/66613Plasmopora viticola; aerial spraying; low volume. |
| spellingShingle | Laise de Souza de Oliveira Chaiane Renata Grigolo Rafael Henrique Pertille Alcir José Modolo José Ricardo da Rocha Campos Adão Robson Elias Idemir Citadin Aerial spraying for downy mildew control in grapevines using a remotely piloted aircraft Acta Scientiarum: Agronomy Plasmopora viticola; aerial spraying; low volume. |
| title | Aerial spraying for downy mildew control in grapevines using a remotely piloted aircraft |
| title_full | Aerial spraying for downy mildew control in grapevines using a remotely piloted aircraft |
| title_fullStr | Aerial spraying for downy mildew control in grapevines using a remotely piloted aircraft |
| title_full_unstemmed | Aerial spraying for downy mildew control in grapevines using a remotely piloted aircraft |
| title_short | Aerial spraying for downy mildew control in grapevines using a remotely piloted aircraft |
| title_sort | aerial spraying for downy mildew control in grapevines using a remotely piloted aircraft |
| topic | Plasmopora viticola; aerial spraying; low volume. |
| url | https://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/66613 |
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