ALERT: Downy Mildew of Cucurbit Detected in Georgia
Downy mildew of squash has been detected from Echols County in Georgia (April 23, 2015). These observations indicate that inoculum of downy mildew is currently in GA and under favorable conditions (cool and wet conditions) can be a potential problem in cucurbits. I would suggest our cucurbit growers to look for the downy mildew symptoms in their fields and start applying protective spray of below stated fungicides.
For watermelon: Ranman or Zampro and tank mixing it with Mancozeb or Chlorothalonil until fruit set.
After fruit set, Ranman or Zampro and tank mixing it with Mancozeb (do not use Chlorothalonil after fruit set as it may cause phytotoxicity in watermelon).
For other cucurbits: Ranman or Zampro and tank mixing it with Mancozeb or Chlorothalonil.
If you have any questions, Please contact the Dooly County Extension Office.