March 2013: South Australian Wine Industry and Wine Grape Council SA publish Reducing Spray Drift. A Discussion Paper on Reducing Off-Target Drift of Group I Herbicides. A key quote is “Damage from off-target spray drift continues…to occur in South Australian vineyards. Every region is at risk, with more significant incidents occurring in the Clare Valley, Barossa Valley, Riverland and Coonawarra. It is believed that damage to vines can persist for a number of seasons.” The main problem appears to the 2,4-D spray drift.