- Basil downy mildew has been reported in Northern New Jersey this past week. All basil growers should continue to scout and be proactive.
- Late blight has been reported on potato as far north as North Carolina near the Virginia border. There have been no reports of late blight in the region to date. To track late blight in the US please visit http://usablight.org/
- Cucurbit downy mildew has been reported on cucumber, butternut, acorn, and yellow summer squash as far north as central South Carolina. To track the progress of CDM in the US please visit http://cdm.ipmpipe.org/
- Bacterial leaf spot are coming in on pepper and tomato.
- Black leg has been reported in potato in southern New Jersey.
- Phytophthora blight on pepper and cucurbit crops has been reported. The heavy rains that have come into and remain in the region have been ideal for P. capsici. All growers need to scout on a regular basis and be proactive.
- Early blight has been reported in tomato.
Vegetable Crops Edition
Seasonal updates and alerts on insects, diseases, and weeds impacting vegetable crops. New Jersey Commercial Vegetable Production Recommendations updates between annual publication issues are included.
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June 23, 2015 Andy Wyenandt
Vegetable Disease Briefs – 6/23/15
June 17, 2015 Kris Holmstrom and Joe Ingerson-Mahar
Veg IPM Update: Week Ending 6/17/15
Sweet Corn
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Warmer evening temperatures have resulted in a slight resurgence of European corn borer (ECB) adults in the blacklight network. A residual first generation population remains in northern NJ, while the activity in the southwestern part of the state may represent the beginning of a second flight. The nature of the southern NJ activity should become clear over the next 1-2 weeks. Areas of highest activity include parts of Morris and Gloucester counties (see ECB map). ECB infestations continue to rise in sweet corn plantings. Feeding ranges from single digits to over 50% in areas where IPM personnel are operating.
[Read more…]
June 14, 2015 Andy Wyenandt
Vegetable Disease Update – 6/14/15
Potato
Black Leg – Black leg is caused by Erwinia spp. which also cause ‘soft rots’. The bacteria which lead to the aerial phase of Blackleg are soil-borne (originate from old crop debris) and spread by rainfall, overhead irrigation and wind. The aerial phase of Blackleg does not originate from decaying seed pieces. The bacterium can enter the plant through wounds created by cultivation or through stems damaged by blowing wind, sand or hail. Dense canopies, warm weather and prolonged periods of leaf wetness favor the spread of aerial Blackleg. Fortunately, the disease rarely extends below ground and only causes dieback of stems over time. Symptoms of the aerial phase of Blackleg first appear as an irregular, water-soaked ‘green’ decay on stems that turns light-brown to black over time. Hot, dry weather will cause infected areas to dry out and become brittle. Do any cultivating when plants are dry, cultivating in the presence of dew or wet plants may help to spread the bacterium around.
June 14, 2015 Andy Wyenandt
Vegetable Diseases of the Week – 6/14/15
This week:
Sweet Basil – Basil downy mildew
Bell Pepper – Bacterial leaf spot
Symptoms of basil downy mildew infection
on Sweet Basil.
Basil downy mildew sporulating on
the underside of infected basil leaf.
Bacterial leaf spot of bell pepper.
June 14, 2015 Andy Wyenandt
Vegetable Disease Briefs 6-14-15
- Basil downy mildew has been reported in New Jersey. All growers should be scouting on a regular basis and applying protectant fungicides.
- Late blight was reported on potato in northern North Carolina near the Virginia border on this past week. There have been no reports of late blight in the region to date. To track late blight in the US please visit http://usablight.org/
- Cucurbit downy mildew has been reported on cucumber, butternut, acorn, and yellow summer squash as far north as central South Carolina. To track the progress of CDM in the US please visit http://cdm.ipmpipe.org/
- The first reports of bacterial leaf spot are coming in on pepper and tomato.
- Black leg has been reported in potato in southern New Jersey.
June 10, 2015 Kris Holmstrom and Joe Ingerson-Mahar
Veg IPM Update: Week Ending 6/10/15
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Sweet Corn
Catches of European corn borer (ECB) are now in decline through much of the state. Remaining areas of highest activity include parts of Morris and Warren counties (see ECB map).
ECB infestations are now rising in sweet corn plantings. Feeding ranges from single digits to 12% in areas where IPM personnel are operating.
