Powdery mildew, Alternaria and Cercospora are three important fungal foliar pathogens that can cause early defoliation in carrots, thus reducing yields and making harvest difficult. Each pathogen produces distinct symptoms. [Read more…]
August 2, 2013 Andy Wyenandt
Vegetable Disease Briefs – 8/2/13
Although conditions have been favorable, No Late blight has been reported in New Jersey this past week.
Basil
Downy mildew remains active – All basil growers should scout on a daily basis and should add a labeled downy mildew specific fungicide to their weekly fungicide program. Phosphite fungicides (FRAC code 33), such as Prophyt, K-Phite, and Rampart have shown the best efficacy in trials at RAREC. Actinovate (OMRI- approved) is also labeled for downy mildew control. Please remember, all abandoned basil fields should be worked under immediately after last harvest to kill the foliage! Abandoned fields left unattended after use will only serve as a source of inoculum for other fields. [Read more…]
July 23, 2013 Andy Wyenandt
Vegetable Diseases of the Week – 7/22/13
Anthracnose fruit rot of tomato
Septoria leaf spot of tomato
Early blight on tomato
July 23, 2013 Andy Wyenandt
Vegetable Disease Briefs – 7/23/12
Late blight Update
No Late blight has been reported in New Jersey this week.
Basil
Downy mildew – All basil growers should scout on a daily basis and should add a labeled downy mildew specific fungicide to their weekly fungicide program. Phosphite fungicides (FRAC code 33), such as Prophyt, K-Phite, and Rampart have shown the best efficacy in trials at RAREC. Actinovate (OMRI- approved) is also labeled for downy mildew control. Please remember, all abandoned basil fields should be worked under immediately after last harvest to kill the foliage! [Read more…]
July 20, 2013 Andy Wyenandt
Vegetable Briefs – 7/20/13
- Cucurbit downy mildew (CDM) has been reported on cucumber throughout the state. All cucurbit growers should scout their fields on a regular basis and should add downy mildew specific fungicides to their regular maintenance program. CDM should be making the jump from cucumber to other cucurbit crops soon, if it hasn’t already done so. If you find CDM on cucurbits besides cucumber please let us know. Once plantings are done being harvested they should be disced under or hit with gramoxone immediately. To track cucurbit downy mildew in the US please visit http://cdm.ipmpipe.org/
- Cucurbit powdery mildew (CPM) This hot weather is ideal for cucurbit powdery mildew development. All growers should scout on a regular basis and continue with their regular maintenance programs. There are a number of fungicides available to control CPM. Please see the 2013 Commercial Vegetable Production Recommendations for more information. Organic cucurbit growers can apply OMRI-approved sulfur and other labeled products to help suppress CPM development.
July 20, 2013 Andy Wyenandt
Late blight update – 7/20/13
There have been no new reports of late blight in New Jersey this past week. Late blight was reported in Northeast OH, Western NY and Lancaster, PA this past week. The extremely hot, dry weather this week throughout NJ has most likely reduced the immediate threat of late blight, but growers should remain cautious because the pathogen could reappear anytime weather conditions favor its development (There is a threat of rainfall everyday this coming week). [Read more…]
