Late blight update/Cornell test results

I received an email from Dr. Bill Fry at Cornell University letting us know that the late blight found on potato in NJ last week was typed as US23. US23 (A1 mating type) is pathogenic on both tomato and potato and sensitive to mefenoxam. 

With that, there have been no new reports of Late blight in New Jersey or region (with the exception of Long Island last week). Potato and tomato growers should be diligent in their scouting of fields and be on regular preventative fungicide maintenance program. 

It looks like the weather is going to cool off significantly over the next 5 to 10 days and there may be periods of prolonged leaf wetness and rainfall (possibly during the middle of next week).

If you suspect late blight please contact your county agent or myself.

Thanks,
Andy

Plant & Pest Advisory Vegetable Alert!

Vegetable Alert!

Date: 5/30/12                                           Alert Author: Andy Wyenandt

Pest: Cucurbit downy mildew confirmed on cucumber in New Jersey

Found: Cucurbit downy mildew has been confirmed on cucumber in areas near Swedesboro/Glassboro (Gloucester County). This is the first report of cucurbit downy mildew in the mid-Atlantic region this year.

Crop(s) at risk: all cucurbit crops in New Jersey.

NJ Vegetable Disease Headlines

Late blight has been confirmed on potato on Long Island this week. There have been no new reports of Late blight in New Jersey

Cucurbit powdery mildew has been found in New Jersey. All cucurbit growers should adjust fungicide programs accordingly.

Cucurbit downy mildew - There have been no new reports in the recent week. Cucurbit downy mildew has been reported as far north as central North Carolina

Spinach downy mildew has been confirmed in New Jersey. All spinach growers should take precautionary action and add a downy mildew specific fungicide to weekly program.

Phytophthora blight has been found in some summer squash fields.

Cabbage downy mildew has also been reported.

Update on migratory insect pests

-Joseph Ingerson-Mahar

Caterpillars of both fall armyworm and beet armyworm were found in sweet corn in the Hammonton area on May 25.  This is a much earlier occurrence of these insects than normal.  Farmers should be vigilant for feeding damage in peppers, tomatoes, sweet corn, spinach and other susceptible crops.