- 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
Vegetable Briefs – 7/20/13
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…]
July 16, 2013 Andy Wyenandt
Late Blight Update – 7/16/13
There have been no new reports of late blight in New Jersey or surrounding region over the past week. Importantly, now that late blight has been found in the region the threat for it to reappear will remain if weather conditions become favorable once again. The hot, dry weather forecasted this week should help reduce threat level for late blight developement.
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 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.
