Alert Date: 5/30/2012
Pest: Cucurbit downy mildew
Location: Cucurbit downy mildew has been confirmed on cucumber in areas near Swedesboro/Glassboro (Gloucester County). This is the first report of cucurbit downy mildew in the mid-Atlantic region this year.
Field Notes: n/a
Crop(s) at risk: All cucurbit crops in New Jersey.
Potential Impact: Significant losses will occur if not controlled properly
Grower Action Plan: Control of cucurbit downy mildew begins with regular scouting, recognizing symptoms and weekly protectant fungicide applications. Now that downy mildew has been detected growers should scout on a daily basis and add a downy mildew specific fungicides to regular fungicide program. As a note, powdery mildew is also active in cucurbits.
Remember, all abandoned cucumber and summer squash fields should be sprayed with gramoxone or disced under immediately after last harvest to kill the foliage! Abandoned fields left unattended after use will only serve as a source of inoculum for other fields once downy mildew makes its way into our area.
To track the progress of cucurbit downy mildew in the eastern US and to keep up with reports of Downy mildew from other states please visit North Carolina State University’s Cucurbit Downy Mildew Forecasting Center at http://www.ces.ncsu.edu/depts/pp/ cucurbit/.
Resources:
Symptoms
Commercial Recommendations Link
Please report if you suspect this pest on your farm to Andy Wyenandt
