A crop protection device, mainly against the spring frosts, characterized in that it has a vertical tube that has a height of at least 3 m and that can possibly be telescopic through which a means of aspiration allow to take the air to a certain altitude and a tube at ground level sensibly parallel to this in which a driving means allow the air to be distributed to the crops through the holes optionally provided with bushes or nozzles and located in the diametral horizontal plane of the tube. (Machine-translation by Google Translate, not legally binding)
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