University of Georgia plant pathologist Dr. Bhabesh Dhutta recently alerted us that downy mildew of watermelon has been detected in Georgia in Sumter County on June 10, 2015. Downy Mildew can be a serious disease of watermelon under the right conditions such as when the weather is wet and humid.
The following fungicides can used in a rotation to help control downy mildew of watermelon:
Ranman+ Mancozeb
Zampro + Mancozeb
Previcur Flex + Mancozeb