Vegetable IPM Report 7-03-13 – Click to View | Download | Print
Current Week’s Pest Maps – Available Maps for the week are highlighted
Rutgers Cooperative Extension
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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Vegetable IPM Report 7-03-13 – Click to View | Download | Print
Current Week’s Pest Maps – Available Maps for the week are highlighted
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.
Late blight was found in processing tomato in Salem County today. Late blight was found in an organic tomato field in Mercer County last week. All commercial and organic tomato and potato growers in NJ should now consider late blight a significant threat and should take immediate steps. All growers should scout their fields on a daily basis. All commercial tomato and potato growers should include late blight specific fungicides in their regular fungicide maintenance programs. All organic tomato and potato growers should apply OMRI-approved copper based products to help suppress late blight development. As long as the current weather conditions continue, late blight will remain a significant threat.
Late blight has been confirmed in two commercial potatoes field in Salem County. These are the first reports of late blight on potato in the state. Late blight was found in an organic tomato field in Mercer County last week. All commercial and organic tomato and potato growers in NJ should now consider late blight a significant threat and should take immediate steps. All growers should scout their fields on a daily basis. All commercial tomato and potato growers should include late blight specific fungicides in their regular fungicide maintenance programs. All organic tomato and potato growers should apply OMRI-approved copper based products to help suppress late blight development. As long as the current weather conditions continue, late blight will remain a significant threat.
Late blight was found in commercial potato field near Leipsic, DE today. The wet weather forecasted for most of this week looks favorable for potential late blight development in New Jersey. Growers should continue to scout their fields on a regular basis and apply weekly protectant fungides whenever they can get into the field. To date, there has been one reported case of late blight on tomato in New Jersey (Mercer County). If you suspect late blight on your farm please contact your county agent.
Check out the Plant & Pest Advisory Organic Farm Advisory section which contains recommendations grounded in replicated trials and experience. These articles aim to support NJ commercial growers using organic methods.