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Article Dans Une Revue Biosystems Engineering Année : 2024

EvaSprayViti: A flexible test bench for comparative assessment of the 3D deposition efficiency of vineyard sprayers at multiple growth stages

F. Lebeau

Résumé

The main approach to protect grapes against diseases involves the use of plant protection products. Understanding the quantitative amount and the distribution of these products on the vines is essential to assess the effectiveness of spray equipment and to evaluate the relationship between dosage and response when targeting pathogens. Improving the targeting of sprayers is an important lever to reduce the quantities of phytosanitary inputs applied, taking into account various cropping systems and training. For this purpose, a regularly distributed artificial canopy, adjustable in height and width was designed to mimic three grapevine growth stages for two of the most common trellised training systems encountered in France for ‘wide row vineyards’ (Royat cordon and Guyot, inter-row width 2.5 m). This artificial canopy was evaluated with the perspective of using it as a testing facility for classifying sprayers. Using a dye tracer, spray deposits were directly recovered after the rinsing of artificial leaves. A first series of experiments defined the most adapted sampling strategy in the canopy according to the crop stage, with the comparison of two contrasted sprayers. A second series of experiments compared the quantities of deposits obtained from both the artificial and a real vine, for several sprayers at a full growth stage and for one sprayer at three growth stages. Deposition patterns and mean deposits on both targets were found comparable, allowing a realistic perspective for the classification of spray application modalities using the artificial vine. A third series of experiments compared deposition at three crop stages on artificial and real vines for one type of sprayer. A fourth series of experiments on the artificial vineyard discriminated between three behaviour classes within 65 spraying modalities that combined sprayer types and sprayer settings (such as nozzle types). The discrimination was achieved using a PCA analysis that confirmed the soundness of the sampling strategy used. Overall, these results highlight the ability of the EvaSprayViti test facility to assess and rank the performance of vineyard sprayers.
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hal-04529797 , version 1 (02-04-2024)

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Paternité - Pas d'utilisation commerciale - Pas de modification

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Anice Cheraïet, Sébastien Codis, Adrien Liénard, Adrien Verges, Mathilde Carra, et al.. EvaSprayViti: A flexible test bench for comparative assessment of the 3D deposition efficiency of vineyard sprayers at multiple growth stages. Biosystems Engineering, 2024, 241, pp.1-14. ⟨10.1016/j.biosystemseng.2024.03.008⟩. ⟨hal-04529797⟩
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