Cucurbit downy mildew has been reported on watermelon (Warren County) and butternut squash (Hunterdon County) in Northern New Jersey. This is the first report on both crops this season. Downy mildew was confirmed on cucumber in New Jersey on July 9th.
All cucurbit growers should include downy mildew specific fungicide(s) in their weekly programs. For more information on the controlling downy mildew on all cucurbit crops please see the 2015 Commercial Fungicide Recommendations Guide. To track the progress of cucurbit downy mildew in the US please visit http://cdm.ipmpipe.org/