Downy mildew of cucurbits has been detected in Thomas County Georgia!
Below is a recommended spray regime from Dr. Bhabesh Dutta, Extension Vegetable Plant Pathologist;
These observations indicate that inoculum of downy mildew is currently in GA and under favorable conditions (cool and wet conditions) potential disease outbreak in cucurbit can occur. 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.
Watermelon: Rotation (foliar application) with Orondis+Bravo/Manzate;
Please do not use bravo after fruit set.
Other cucurbits: Ranman+Bravo; Previcur flex+Bravo
If Orondis was used as a soil application, please do not use it as foliar (use restriction according to label).
If Orondis was not used as a soil application, foliar application can be done for controlling downy mildew.