White speck on vine and stem of infected pumpkin plant. Note the numerous small, white diamond shaped lesions.
White speck lesions covering the surface of immature and mature pumpkin fruit. White speck will only cause cosmetic injury to fruit.
August 16, 2013 Andy Wyenandt
Vegetable Disease Update 8/16/13
No Late blight has been reported in New Jersey this week.
Cucurbit downy mildew remains active.
White speck (or Plectosporium blight) has been reported in pumpkin. [Read more…]
August 8, 2013 Andy Wyenandt
Vegetable Diseases of the Week – 8/9/13
Phytophthora fruit rot of butternut squash
Leaf spots on an infected eggplant leaf caused by Phomopsis. (Note the black fruiting bodies in the center of the spots)
August 8, 2013 Andy Wyenandt
Vegetable Disease Update – 8/9/13
No Late blight has been reported in New Jersey this week.
Cucurbit downy mildew has been found on pumpkin in northern New Jersey.
Phytophthora blight remains active in many crops. The good news is that next week should bring some dry weather.
An early indication from our pepper bacterial leaf spot differential trial is that Race 6 is present in southern New Jersey. We’ll have more information later this fall.
Phomopsis leaf spot has been found on Italian eggplant. [Read more…]
August 6, 2013 Andy Wyenandt
Cucurbit downy mildew confirmed on pumpkin in Morris County – 8/6/13
Cucurbit downy mildew has been reported on pumpkin in Morris County. This is the first report of downy mildew on pumpkin this growing season. Cucurbit downy mildew has also been showing up on cucurbit crops (other than cucumber) in other states this past week. All cucurbit crops in New Jersey are at risk for downy mildew. Downy mildew specific fungicides should now be a part of all weekly fungicide maintenance programs if not already initiated. For current 2013 Cucurbit Downy and Powdery Mildew Management Guidelines please see post from 6/7/13. If you suspect downy mildew on any cucurbit crop please contact your county agent. Please visit http://cdm.ipmpipe.org/ to track the progress of downy mildew throughout the US.
August 2, 2013 Andy Wyenandt
Controlling fungal leaf blights of Carrot
Powdery mildew, Alternaria and Cercospora are three important fungal foliar pathogens that can cause early defoliation in carrots, thus reducing yields and making harvest difficult. Each pathogen produces distinct symptoms. [Read more…]
