Andy Wyenandt

Late blight has been found in a small tomato planting near Layton in Sussex County.

This is the second report this growing season in New Jersey and the first since early July. All tomato growers should scout their fields on a regular basis. The incoming hot, dry weather should help reduce any potential threat from late blight.

• Dickeya sp., an aggressive form of Black leg, has been confirmed on potato in New Jersey.
  Symptoms of Dickeya infection look similar to Black leg infection and can cause significant rot above ground (stems and foliage) and below ground (tubers). Very little information is available on Dickeya, since it is most likely a new pathogen on potato to the US. It has also been found in Europe in recent years.
• Bacterial leaf spot race 6 was confirmed on bell pepper near Vineland this past week. All bell and non-bell pepper varieties currently grown in New Jersey lack resistance to this race of the pathogen.
  All pepper growers need to scout on a regular basis and know what BLS resistance packages the varieties they grow carry. Bell pepper varieties such as Tomcat and 1819 carry resistance to races 1 to 5. Thus, if symptoms of BLS appear on either variety then race 6 is most likely present on the farm and any pepper that lacks resistance to race 6 has the potential to become infected.

• Bacterial leaf spot race 6 has been confirmed on bell pepper in the Vineland area. This has major implications since all widely-grown peppers (bell and non-bell) in New Jersey do not have resistance to this race. All bell peppers growers need to scout on a regular basis and know what BLS resistance packages are present in the varieties they are growing.
• There have been no new reports of late blight in New Jersey since 7/8 although it has been reported in other States in the region. To track late blight in the US please visit http://usablight.org/
• Cucurbit downy mildew has been reported on cucumber in New Jersey and on cucumber and butternut squash. All cucurbit growers should include downy as well as powdery mildew specific fungicides in their weekly maintenance sprays. To track the progress of CDM in the US please visit http://cdm.ipmpipe.org/.
• Basil downy mildew remains active across the region.
• Pepper anthracnose has been reported.

• There have been no new reports of late blight in New Jersey since 7/8 although it has been reported in other States in the region. To track late blight in the US please visit http://usablight.org/
• Cucurbit downy mildew has been reported on cucumber in New Jersey and on cucumber and butternut squash. All cucurbit growers should include downy as well as powdery mildew specific fungicides in their weekly maintenance sprays. To track the progress of CDM in the US please visit http://cdm.ipmpipe.org/.
• Bacterial leaf spot is being reported on pepper and tomato. There is evidence that BLS race 6 and/or 10 is present in New Jersey this season. Samples have been submitted for confirmation.
• Basil downy mildew remains active across the region.

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/

• There have been no new reports of late blight in New Jersey since 7/8. To track late blight in the US please visit http://usablight.org/
• Cucurbit downy mildew has been reported on cucumber in New Jersey and on cucumber and butternut squash in PA this past week. To track the progress of CDM in the US please visit http://cdm.ipmpipe.org/.
• Bacterial leaf spot is being reported on pepper and tomato.
• Basil downy mildew remains active across the region.
• Phytophthora blight has been reported on multiple crops.
• Pepper anthracnose has been reported in southern New Jersey.