An Epidemic of Downy Mildew caused by <i>Peronospora destructor</i> on Vidalia Sweet Onions in Georgia in 2012

Fig. 3. Sampling locations of onion downy mildew outbreak regions in Georgia in March 2012: 1 = Candler Co.; 2 = Bulloch Co.; 3 = Toombs Co.; 4 and 7 = Tattnall Co.; 5 = Evans Co.; and 6 = Appling Co.



Image from Plant Health Progress article:
An Epidemic of Downy Mildew caused by Peronospora destructor on Vidalia Sweet Onions in Georgia in 2012