Fungicide application (a weekly schedule):
Downy mildew of cabbage has been detected from Colquitt County in Georgia (Dec 9, 2016). These observations indicate that inoculum of downy mildew is currently in GA and under favorable conditions (cool and wet conditions) potential disease outbreak in cabbage and other cruciferous/cole crops can occur. I would suggest our growers to look for the downy mildew symptoms in their fields and start applying protective spray of below stated fungicides.
Tank mix Chlorothanonil with Reason or Presidio or Revus or Forum.
For more information please contact your local county extension agent.