Heavy rains the past month have caused concern that residual preplant incorporated and preemergence herbicide applications may and not provide the length of weed control expected and increase the risk of crop injury compared to when rainfall is closer to average. The affect of the additional rainfall on herbicide activity and crop safety is complex, and is influenced the soil and the chemical properties of each herbicide. [Read more…]
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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July 10, 2013 Kris Holmstrom and Joe Ingerson-Mahar
Veg IPM Update: Week Ending 7/10/13
Vegetable IPM Report 7-10-13 – Click to View | Download | Print
Current Week’s Pest Maps – Available Maps for the week are highlighted
July 10, 2013 Andy Wyenandt
Cucurbit Downy Mildew Found on Cucumber in Northern New Jersey
Cucurbit downy mildew was found in a research plot near Pittstown in northern New Jersey this week . All cucurbit growers should scout their fields on a regular basis and should add a downy mildew specific fungicide to thier weekly fungicide maintenance program. For current 2013 Cucurbit Downy and Powdery Mildew Management Guidelines please see post from 6/7/13. Additional information on the control of cucurbit downy mildew can be found in the 2013 Commercial Vegetable Production Recommendations.
July 6, 2013 Kris Holmstrom and Joe Ingerson-Mahar
Veg IPM Update: Week Ending 7/03/13
Vegetable IPM Report 7-03-13 – Click to View | Download | Print
Current Week’s Pest Maps – Available Maps for the week are highlighted
July 4, 2013 Andy Wyenandt
Vegetable Briefs and Updates – 7/4/13
- Cucurbit downy mildew was reported on cucumber in Salem County on 7/3. This is the first report of CDM in the state this year. All cucurbit growers should scout on a regular basis and add a downy mildew specific fungicide to their regular maintenance program. To track cucurbit downy mildew in the US please visit http://cdm.ipmpipe.org/
- Late blight was found on potato and processing tomato in Salem county on 7/2. All potato and tomato growers who have not initiated a protectant fungicide program should do so. All growers should consider adding a late blight specific fungicide to their program as long as the current weather pattern sticks around. To track late blight in the US please visit http://usablight.org/
- Timber rot (AKA white mold) and Botrytis (AKA grey mold) have been reported on field-grown tomato this week. [Read more…]
July 3, 2013 Andy Wyenandt
Cucurbit downy mildew found on cucumber in New Jersey – 7/3/13
Cucurbit downy mildew was found in a commercial cucumber field in Salem County in southern New Jersey today. This is the first report of cucurbit downy mildew in the state this growing season. All cucurbit growers should scout their fields on a regular basis and should add a downy mildew specific fungicide to thier weekly fungicide maintenance program. For current 2013 Cucurbit Downy and Powdery Mildew Management Guidelines please see post from 6/7/13. Additional information on the control of cucurbit downy mildew can be found in the 2013 Commercial Vegetable Production Recommendations.
Organic growers should scout thier cucurbit plantings on a regular basis and apply an OMRI-approved copper based fungicide or other labeled product to help suppress the development of cucurbit downy mildew. Adequate and repeated spray coverage of the bottom of all leaf surfaces is critical for the control of cucurbit downy mildew in organic cucurbit production. It is important to remember that control of downy mildew begins with planting resistant cucumber varieties when possible. No other cucurbits have resistance to downy mildew.
