This tunnel sprayer, the principal of which is widely used in "pedestrian" orchards, incorporates several improvements enabling it to apply the treatment product in a projected jet, while favouring its passage through the foliage through suction.
Three fans with helical blades are positioned vertically on the central partition and generate a stream of forced air. The air stream follows a semi-circular path after a 180° rotation and, after it having crossed the vegetation, suction is performed on the other side.

Spraying and recovery are performed on both sides of the vine, to ensure consistent treatment of the two.
A tank integrated into the lower part of each shield recovers the liquid, re-sending it to the plant treatment product reservoir. Recovery rates are improved, in line with the objectives of the Ecophyto 2018 programme.