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Publications (23)
Title Assessment of the complementarity between field observations and multispectral UAV imaging for optimized cover crop management in viticulture: Towards a comprehensive approach to the functioning of agroecological practices Keywords: UAV, Image analysis, cover crop management, sustainable viticulture, on-farm experiment Introduction The evolut...
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...
Objective: To propose and to test a framework and workflow to analyse LiDAR data to be able to evaluate (via simulation) the application of variable chemical sprays according to vine architecture and grower needs in Lake Erie Concord vineyards.
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...
One strategy to optimise spraying is to adjust the spray rate according to local vegetative characteristics. Mobile 2D LiDAR proximal sensor data and local measurements of deposition rates from a side-by-side sprayer were made across eleven narrow inter-row fields in three French vineyards at three dates in 2021. Primary canopy attributes (height,...
Multispectral image time-series have been promising for some years; yet, the substantial advance of the technology involved, with unprecedented combinations of spatial, temporal, and spectral capabilities for remote sensing applications, raises new challenges, in particular, the need for methodologies that can process the different dimensions of sa...
Predicting the dose to be applied on the basis of the structural characteristics of the plant canopy is a crucial step for the optimization of the spraying process. Mobile 2D LiDAR sensor data and local measurements of deposition rates from a face-to-face sprayer were made across eight fields in two Mediterranean vineyards at four dates in 2016 and...
One of the ways to reduce the use of pesticides is to adapt their dosage to the needs of the plant by using variable rate technology for managing field spatial variability. The recent evolution of technologies in the field of robotics, mechatronics and new information and communication technologies is paving the way for the development and diffusio...
The social demand for a reduction in the use of plant protection products (PPP) is a driver to reconsider the vine protection process. Today agro-chemical doses are expressed as a fixed quantity per unit area of ground in the field. Dose rates are independent of the conditions of application, and this includes the quantity of foliage to be protecte...
Les technologies disponibles pour la pulvérisation de précision en viticulture et arboriculture sont essentiellement au stade de prototypes. Elles reposent essentiellement sur la gestion tout ou rien de buses en fonction de manques de végétation dans une haie végétale palissée. La question des échelles dans la caractérisation du couvert végétal et...
The 3D characterisation of individual vine canopies with a LiDAR sensor requires point cloud classification. A Bayesian point cloud classification algorithm (BPCC) is proposed that combines an automatic filtering method (AFM) and a classification method based on clustering to process LiDAR data. Data were collected on several grape varieties with t...
One strategy to reduce usage of crop protection agrochemicals in viticulture is to adjust the spray rate according to local vegetative characteristics. Acquisitions of mobile 2D LiDAR data and deposition rate measurements with a face-to-face sprayer were made on plant blocks in 5 fields and at 4 dates in a Mediterranean vineyard. Two indicators wer...
One strategy to reduce usage of crop protection agrochemicals in viticulture is to adjust the spray rate according to local vegetation characteristics. Acquisitions of mobile 2D LiDAR data and deposition rate measurements with a face-to-face sprayer were made on plant blocks in 5 fields and at 4 dates in a Mediterranean vineyard. Two indicators wer...
Leaf mass per area (LMA) and leaf equivalent water thickness (EWT) are key leaf functional traits providing information for many applications including ecosystem functioning modeling and fire risk management. In this paper, we investigate two common conclusions generally made for LMA and EWT estimation based on leaf optical properties in the near-i...
This article illustrates a short training course for students at the Master's level, which explores relationships between plants and soil. It takes place in the Forest of Fontainebleau (France), where a reception centre with a large room (30 m2) is located containing a Berlese equipment, and many microscopes. On the first day, students are accompan...