Rutgers Cooperative Extension
Once cucurbit downy mildew (CDM) is detected in the mid-Atlantic region (as of yesterday in Maryland) all cucurbit growers in New Jersey should begin to include downy mildew specific fungicides in their weekly fungicide programs on all cucurbit crops.
Symptoms of cucurbit downy mildew on infected cucumber leaf.
Cucurbit downy mildew has been confirmed on cucumber in Caroline County, Maryland.
This is the first report of cucurbit downy mildew in the mid-Atlantic region this growing season. All cucurbit growers should scout their fields on a regular, if not, daily basis. All cucurbit growers should consider switching to a preventative fungicide program that includes downy mildew specific fungicides. For more information, please see the 2014 Commercial Vegetable Fungicide Recommendations Guide.
Late blight was reported on potato in Erie County, New York and Cambria County, PA (west central) late last week. This is the first report of late blight in PA this season. There are also suspected cases of late blight are being reported on potato and tomato in Lancaster County, PA.
All tomato and potato growers in New Jersey should begin to scout their fields on a regular, if not daily basis. There have been no reported cases of late blight in New Jersey to date! However, all growers (conventional and organic) who have not initiated protectant fungicide maintenance programs should consider doing so. For organic growers, preventative copper applications should be considered. For more information on controlling late blight please see the 2014 Commercial Vegetable Fungicide Recommendations Guide.
Late blight has been reported on potato on Long Island. This is the first report of late blight in the region to date. Potato and tomato growers should scout their fields on a regular, if not, daily basis and initiate their regular preventative fungicide programs if not already done so.
Downy mildew sporulating on the bottom side of an infected collard leaf.
Note the white spore masses.
