Evaluation of the distribution of spray deposits within a vine canopy from measurements on artificial targets and real leaves
Understanding the distribution of intercepted spray deposits is important for the study of the dose-response relationship of spraying a targeted pathogen and for the optimisation of the spraying process. However, carrying out exhaustive measurements of canopy spray deposits is difficult, particularl...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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International Viticulture and Enology Society
2022-10-01
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| Series: | OENO One |
| Subjects: | |
| Online Access: | https://oeno-one.eu/article/view/5414 |
| _version_ | 1811182241475198976 |
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| author | Anice Cheraiet Olivier Naud Mathilde Carra Sébastien Codis James Taylor |
| author_facet | Anice Cheraiet Olivier Naud Mathilde Carra Sébastien Codis James Taylor |
| author_sort | Anice Cheraiet |
| collection | DOAJ |
| description | Understanding the distribution of intercepted spray deposits is important for the study of the dose-response relationship of spraying a targeted pathogen and for the optimisation of the spraying process. However, carrying out exhaustive measurements of canopy spray deposits is difficult, particularly in production situations. This new experimental method for use in commercial vineyards was based on the installation of artificial targets (PVC collectors) within the canopy. To evaluate the quality of this experimental method for estimating the statistical distribution of deposition it was compared to an intensive manual method of foliar deposition measurements on real leaves. Intercepted deposition data on the real leaves and artificial targets were collected in a regular grid pattern within 12 non-contiguous vegetation sections. The results showed that although the means were similar, the variance in deposition appeared to differ between the distributions on artificial targets and real foliage, with CV values of between 37.4-52.7 % and 69.4-80.5 % respectively. Therefore, any central statistics must be supplemented with a statistical distribution analysis to account for the dispersion of deposition values within the vegetation. The results from comparisons between the cumulative distributions of intercepted deposition on the real leaves and on the PVC collector sections showed that the deposition estimates averaged over three-vine sections gave relevant, repeatable estimates for both approaches. The results also showed that for low deposition values, the experimental method led to a correct estimation of deposition on real leaves. However, above 230 ng dm² per 1 g/ha, the experimental method underestimated the deposition on real leaves by 13.6 %. Using these methodological results, it may be possible to develop models capable of predicting the distribution of deposition within the plant canopy. It would thereby be possible to develop an approach for variable-rate sprayer control that takes into account the phytosanitary risk and the site-specific variable structure of the vegetation during the season. |
| first_indexed | 2024-04-11T09:29:14Z |
| format | Article |
| id | doaj.art-bc83f93306484390ae4fed52c29d9b41 |
| institution | Directory Open Access Journal |
| issn | 2494-1271 |
| language | English |
| last_indexed | 2024-04-11T09:29:14Z |
| publishDate | 2022-10-01 |
| publisher | International Viticulture and Enology Society |
| record_format | Article |
| series | OENO One |
| spelling | doaj.art-bc83f93306484390ae4fed52c29d9b412022-12-22T04:31:57ZengInternational Viticulture and Enology SocietyOENO One2494-12712022-10-0156410.20870/oeno-one.2022.56.4.5414Evaluation of the distribution of spray deposits within a vine canopy from measurements on artificial targets and real leavesAnice Cheraiet0Olivier Naud1Mathilde Carra2Sébastien Codis3James Taylor4ITAP, Univ Montpellier, INRAE, Institut Agro, Montpellier - IFV French Vine and Wine Institute, 3430 Route de l'Espiguette, Le Grau-du-RoiITAP, Univ Montpellier, INRAE, Institut Agro, MontpellierITAP, Univ Montpellier, INRAE, Institut Agro, MontpellierIFV French Vine and Wine Institute, 3430 Route de l'Espiguette, Le Grau-du-RoiITAP, Univ Montpellier, INRAE, Institut Agro, MontpellierUnderstanding the distribution of intercepted spray deposits is important for the study of the dose-response relationship of spraying a targeted pathogen and for the optimisation of the spraying process. However, carrying out exhaustive measurements of canopy spray deposits is difficult, particularly in production situations. This new experimental method for use in commercial vineyards was based on the installation of artificial targets (PVC collectors) within the canopy. To evaluate the quality of this experimental method for estimating the statistical distribution of deposition it was compared to an intensive manual method of foliar deposition measurements on real leaves. Intercepted deposition data on the real leaves and artificial targets were collected in a regular grid pattern within 12 non-contiguous vegetation sections. The results showed that although the means were similar, the variance in deposition appeared to differ between the distributions on artificial targets and real foliage, with CV values of between 37.4-52.7 % and 69.4-80.5 % respectively. Therefore, any central statistics must be supplemented with a statistical distribution analysis to account for the dispersion of deposition values within the vegetation. The results from comparisons between the cumulative distributions of intercepted deposition on the real leaves and on the PVC collector sections showed that the deposition estimates averaged over three-vine sections gave relevant, repeatable estimates for both approaches. The results also showed that for low deposition values, the experimental method led to a correct estimation of deposition on real leaves. However, above 230 ng dm² per 1 g/ha, the experimental method underestimated the deposition on real leaves by 13.6 %. Using these methodological results, it may be possible to develop models capable of predicting the distribution of deposition within the plant canopy. It would thereby be possible to develop an approach for variable-rate sprayer control that takes into account the phytosanitary risk and the site-specific variable structure of the vegetation during the season.https://oeno-one.eu/article/view/5414tunnel sprayerpesticide applicationspray deposition assessmentspray qualitytracersampling unit |
| spellingShingle | Anice Cheraiet Olivier Naud Mathilde Carra Sébastien Codis James Taylor Evaluation of the distribution of spray deposits within a vine canopy from measurements on artificial targets and real leaves OENO One tunnel sprayer pesticide application spray deposition assessment spray quality tracer sampling unit |
| title | Evaluation of the distribution of spray deposits within a vine canopy from measurements on artificial targets and real leaves |
| title_full | Evaluation of the distribution of spray deposits within a vine canopy from measurements on artificial targets and real leaves |
| title_fullStr | Evaluation of the distribution of spray deposits within a vine canopy from measurements on artificial targets and real leaves |
| title_full_unstemmed | Evaluation of the distribution of spray deposits within a vine canopy from measurements on artificial targets and real leaves |
| title_short | Evaluation of the distribution of spray deposits within a vine canopy from measurements on artificial targets and real leaves |
| title_sort | evaluation of the distribution of spray deposits within a vine canopy from measurements on artificial targets and real leaves |
| topic | tunnel sprayer pesticide application spray deposition assessment spray quality tracer sampling unit |
| url | https://oeno-one.eu/article/view/5414 |
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