The mechanical solution to vine rubbing (ébourgeonnage) in an organic vineyard is explained here by James from Domaine Begude. Water shoots develop from the old parts of the vine and do not usually produce grapes. They also tend to compact the vine and prevent proper sunlight penetration and air flow. Although water shoots can be used to renew a cordon (arm) when a cordon dies or become unfruitful, they are normally useless on a grape vine and should be removed. And that means either by hand or by machine in an organic environment.