Andy Wyenandt

Cucurbit downy mildew has been reported on winter squash near Glassboro in southern New Jersey (Gloucester County). This is the third report of CDM this growing season in the state. All cucurbit growers are encouraged to scout fields on a daily basis and begin preventative fungicide programs if already not initiated.

• Cucurbit downy mildew has been reported on butternut squash in Gloucester County this week. All cucurbit growers are encouraged to scout their fields on a regular basis and to initiate a downy mildew specific fungicide program. This is the first report of CDM in butternut squash in New Jersey this growing season. To track the progress of CDM in the US please visit the CDMpipe forecasting website here.
• There have been no reports of late blight in the region to date. Phytophthora nicotianae has been reported in the region in recent weeks. Symptoms caused by P. nicotianae look similar to late blight. If you suspect late blight on potato or tomato please contact your county Extension office.
• Basil downy mildew has been reported in southern New Jersey on BDM susceptible sweet basil lines. All basil growers are encouraged to initiate a BDM specific fungicide program. To track the progress of BDM in the US please visit here.
• Black leg symptoms have been reported on potato vines. Growers should dig up a few hills with aerial black leg symptoms to see if bacteria has worked its way into developing tubers. If tubers “stink” then traditional black leg is present. If rotten tubers are present and have no smell, please contact your County agent so samples can be collected and tested.
• Bacterial leaf spot has been reported in tomato and pepper.
• Phytophthora blight has been reported in pepper and other crops.
• Angular leaf spot has been reported on cucurbit crops. Click here for a nice review of diagnosing angular leaf spot, bacterial leaf blight, downy mildew, and anthracnose in cucurbit crops from Dr. Beth Gugino, vegetable pathologist, at Penn State.
• Cucurbit powdery mildew has been reported. Apply and rotate fungicides that are specific for CPM control.
• The 2019 Fungicide Resistance Management Guide for Vegetable Crops in the mid-Atlantic Region is now available for FREE online.
• For more information on controlling these and other important diseases please see the 2019 Mid-Atlantic Commercial Vegetable Production Guide. The guide is available for FREE online by following the links on the Plant and Pest Advisory website. Hardcopies of the 2019 guide can be purchased through your local county Extension office.

• Cucurbit downy mildew has been reported cucumber in Salem County. All cucumber growers are encouraged to scout their fields on a regular basis and to initiate a downy mildew specific fungicide program. This is the first report of CDM in New Jersey this growing season. To track the progress of CDM in the US please visit the CDMpipe forecasting website here.
• There have been no reports of late blight in the region to date. Phytophthora nicotianae was reported on potato on the eastern shore of Virginia a few weeks ago. Symptoms caused by P. nicotianae look similar to late blight. If you suspect late blight on potato or tomato please contact your county Extension office.
• Basil downy mildew has been reported in southern New Jersey on BDM susceptible sweet basil lines. All basil growers are encouraged to initiate a BDM specific fungicide program if not already done so.
• Black leg symptoms have been reported on potato vines. Growers should dig up a few hills with aerial black leg symptoms to see if bacteria has worked its way into developing tubers. If tubers “stink” then traditional black leg is present. If rotten tubers are present and have no smell, please contact your County agent so samples can be collected and tested.
• Bacterial leaf spot has been reported in tomato and pepper.
• Phytophthora blight has been reported in pepper.
• The 2019 Fungicide Resistance Management Guide for Vegetable Crops in the mid-Atlantic Region is now available for FREE online.
• For more information on controlling these and other important diseases please see the 2019 Mid-Atlantic Commercial Vegetable Production Guide. The guide is available for FREE online by following the links on the Plant and Pest Advisory website. Hardcopies of the 2019 guide can be purchased through your local county Extension office.

• Cucurbit downy mildew has been reported cucumber as far north as Maryland (Carolina Co.) on the Delmarva Peninsula. This is the first report of CDM in the region this growing season. All cucumber growers are encouraged to scout their fields on a regular basis. To track the progress of CDM in the US please visit the CDMpipe forecasting website here.
• There have been no reports of late blight in the region to date. Phytophthora nicotianae was reported on potato on the eastern shore of Virginia last week. Symptoms caused by P. nicotianae look similar to late blight. If you suspect late blight on potato or tomato please contact your county Extension office.
• The 2019 Fungicide Resistance Management Guide for Vegetable Crops in the mid-Atlantic Region is now available for FREE online.
• For more information on controlling these and other important diseases please see the 2019 Mid-Atlantic Commercial Vegetable Production Guide. The guide is available for FREE online by following the links on the Plant and Pest Advisory website. Hardcopies of the 2019 guide can be purchased through your local county Extension office.