A technical workshop involving 60 vine-growing experts was held in Tarragona (ES) on May 31, 2018 to discuss about the pesticide dose decision tool developed by EUCLID project, DOSE3D.
This EUCLID event was hosted by the Oenology Faculty (Rovira Virgili University) and organized by the University of Lleida (UdL) and the Department of Agriculture of the Catalan government, Generalitat de Catalunya.

The contributors were EUCLID researchers, policy makers, officers, pest control advisers (ADVs), pesticide evaluators, Spanish and French researchers (UdL, Universitat Politècnica de Catalunya and IFV Montpellier) and responsible from the plant protection services.

Participants identified several difficulties to establish the correct doses for chemical control of grape pests and diseases including yellow mite (Eotetranychus carpini), downy mildew (Plasmopara viticola) and powdery mildew (Uncinula necator).
Furthermore, the decision support system DOSA3D (www.dosa3d.com) was explained. The system allows setting the optimal spray volume and dose rates, taking into account the following factors: crop dimension, pest to be controlled and spraying efficiency.
As a general conclusion, participants underlined that the usual way to express the dose (concentration of the spraying liquid on ground surface) needs to be replaced by a more realistic system considering dimensional parameters of the vines and sprayer characteristics. Additionally, there were several proposals regarding the application requirements that have to be included in the label of chemicals. A list of these proposals will be sent to the regulators and to the responsible for standardization action in EPPO for consideration.