- 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.
Vegetable Disease Briefs – 8/11/15
Vegetable Disease Briefs – 8/2/15
- 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 Reported: Watermelon & Butternut Squash in NJ ALERT – 7/22/15
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/
Vegetable Disease Briefs – 7/20/15
- 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.
Intro to Organic Vegetable Production Field Day from Penn State, Aug 6, 2015
Location
Good Work Farm
4791 Rock Road
Zionsville, PA 18092Date: August 6, 2015 from 4 to 7 pm
4:00 PM Farm Tour
4:45 PM Scouting and Identification Exercise
5:45 PM Disease Management and Discussion
6:30 PM DinnerRegistration
This field day is part of the Introduction to Organic Vegetable Production series. No pre-registration is required. Walk-in to join us. $10 walk-in fee covers dinner and materials.
Penn State Extension is offering An Introduction to Organic Vegetable Production Field Day focusing on plant disease scouting, identification, and management on the evening of August 6th at Good Work Farm in Zionsville, PA located about an hour north of Philadelphia. For more information see Organic Vegetable Production Field Day.
Of Note from UDel: Late blight Look-a-like in Potato & Late blight Lineages
Two important topics were addressed by Dr. Nathan Kleczewski, Extension Specialist in Plant Pathology at the University of Delaware this week in the Weekly Crop Update.
- Phytophthora nictotiana, a late blight look-a-like, was found on potato in DE
- Explaining Late blight lineages in relationship to thier potential host and sensitivity to mefenoxam
We have on occasion detected Phytophthora nicotiana on potato in southern New Jersey when wet weather conditions have been prolonged. The good news is that P. nicotiana, although it looks like Late blight, does not show anywhere near the destructiveness that comes with Late blight.
Last week Late blight, Phytophthora infestans, (US23) was found in tomato in Northern New Jersey. US23 has been the predominant genotype found throughout the region during the past few years. Why is knowing the genotype so important? US23 will infect both tomato and potato and has been shown be sensitive or to have intermediate-sensitivity to mefenoxam (i.e., Ridomil Gold). Knowing that US23 is present in New Jersey should put all tomato and potato growers on high alert and everyone should be scouting on a regular basis. All tomato and potato growers should initiate standard protectant fungicide programs if they already haven’t done so.