Andy Wyenandt

• All cucurbit growers are encouraged to scout their fields on a regular basis and continue to use a downy mildew specific fungicide program. Fungicides that are specific to CDM should be included in weekly fungicide maintenance programs for cucurbit powdery mildew control. To track the progress of CDM in the US please visit the CDMpipe forecasting website here.
• Basil downy mildew has been reported in New Jersey on BDM susceptible and resistant sweet basil lines. All basil growers should continue to scout and follow a BDM specific fungicide program even when using DMR varieties. To track the progress of BDM in the US please visit here.
• Downy mildew has been reported in turnip greens. Growers who have fall leafy greens and cole crops should scout daily and be proactive and initiate a regular downy mildew specific fungicide program. Although its been relatively dry, spotty showers, cooler nights, and longer periods of dew (leaf wetness) have made conditions ideal for downy mildew development across a number of susceptible crops.
• Pepper anthracnose continues to be reported.
• 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 was been reported on pumpkin in Warren 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 on pumpkin in New Jersey this growing season. Fungicides that are specific to CDM should be included in weekly fungicide maintenance programs for cucurbit powdery mildew control. To track the progress of CDM in the US please visit the CDMpipe forecasting website here.
• There have been a few reports of Southern blight (Sclerotinia rolfsii) on tomato and pepper. Southern blight is much more common in vegetable areas south of the state where summer temperatures remain hotter (above 90°F) for longer periods of time. Like white mold, caused by Sclerotinia sclerotiorum, it can survive in the soil for many years. Symptoms of Southern blight include infection at the base of the stem at the soil-line. The resulting infection will girdle the plant causing wilt and death. The fungus will produce white, cottony mycelium and very small, spherical sclerotia which are often have a tannish, brown color.
• Cercospora leaf blight has been reported in a newly planted asparagus field.
• Corn leaf rust has been reported in northern New Jersey.
• Basil downy mildew has been reported in New Jersey on BDM susceptible sweet basil lines. All basil growers are encouraged to initiate a BDM specific fungicide program even when using DMR varieties. To track the progress of BDM in the US please visit here.
• Phytophthora blight has been reported in pepper and other crops.
• Bacterial leaf spot has been widely reported in pepper plantings.
• 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 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.