- There have been no new reports of Late blight this this past week. All abandoned tomato fields should be mowed down or burned down with herbicide once harvesting is done.
- Pepper anthracnose remains active. Weekly maintenance sprays should continue as long as harvesting continues in fields where anthracnose is active.
- Following the heavy rains and with more rain expected over the weekend, bacterial leaf spot in pepper and marginal necrosis and leaf spot in leafy greens are being reported. Fungal leaf spots are also being reported. Preventative fungicide programs will help reduce fungal and bacterial problems in leafy greens.
- Cucurbit downy mildew has been confirmed on cucumber in New Jersey. Downy mildew is beginning to be reported on many other cucurbits in other parts of the country. All cucumber growers should continue with a downy mildew-specific fungicide to their weekly fungicide programs. All cucurbit growers need to scout on a regular basis and should mow or burn off fields when harvesting in done.
October 6, 2016
Vegetable Disease Briefs – 10/6/16
September 22, 2016
Vegetable Disease Briefs – 9/22/16
- There have been no new reports of Late blight this this past week. All abandoned tomato fields should be mowed down or burned down with herbicide once harvesting is done.
- Following the heavy rain, bacterial leaf spot in pepper and marginal necrosis and leaf spot in leafy greens are being reported.
- Cucurbit downy mildew has been confirmed on cucumber in New Jersey. To date, cucurbit downy mildew has been reported on cucumber and melon in the mid-Atlantic region. Downy mildew is beginning to be reported on many other cucurbits in other parts of the country. All cucumber growers need to add a downy mildew-specific fungicide to their weekly fungicide programs. All cucurbit growers need to scout on a regular basis.
September 13, 2016
Vegetable Disease Briefs – 9/13/16
- Cucurbit downy mildew has been confirmed on cucumber in New Jersey. To date, cucurbit downy mildew has been reported on cucumber and melon in the mid-Atlantic region. Downy mildew is beginning to be reported on many other cucurbits in other parts of the country. All cucumber growers need to add a downy mildew-specific fungicide to their weekly fungicide programs. All cucurbit growers need to scout on a regular basis.
- Pepper anthracnose is being reported in southern New Jersey.
- Cucurbit powdery mildew is active on all cucurbit crops.
- There have been no new reports of Late blight this this past week.
September 6, 2016
Vegetable Disease Briefs – 9/6/16
- Cucurbit downy mildew has been confirmed on cucumber in New Jersey. To date, cucurbit downy mildew has been reported on cucumber and melon in the mid-Atlantic region. All cucumber growers need to add a downy mildew-specific fungicide to their weekly fungicide programs. All cucurbit growers need to scout on a regular basis.
- Dickeya dianthicola was confirmed in New Jersey on ‘Dark Red Chieftain’ originating from New Brunswick, Canada this past week. This is the third report of Dickeya on seed originating from Canada this summer. ‘Yukon Gold’ and ‘Reba’ from New Brunswick, Canada have also tested positive. In total, Dickeya dianthicola has been confirmed in 16 states to date. All potato growers are encouraged to scout fields and report any suspect plants/tubers. The best method for keeping your potato operation Dickeya-free is to adopt your own 0% Dickeya-tolerance policy.
- Pepper anthracnose is being reported in southern New Jersey.
- Cucurbit powdery mildew is active on all cucurbit crops.
- There have been no new reports of Late blight this this past week.
August 25, 2016
Vegetable Disease Briefs – 8/25/16
- Cucurbit downy mildew has been confirmed on cucumber in New Jersey. To date, cucurbit downy mildew has been reported on cucumber and melon in the mid-Atlantic region. All cucumber growers need to add a downy mildew-specific fungicide to their weekly fungicide programs. All cucurbit growers need to scout on a regular basis.
- Dickeya dianthicola has been confirmed in 16 states to date. All potato growers are encouraged to scout fields and report any suspect plants/tubers. The best method for keeping your potato operation Dickeya-free is to adopt your own 0% Dickeya-tolerance policy.
- Pepper anthracnose is being reported in southern New Jersey.
- Cucurbit powdery mildew is active on all cucurbit crops.
- Late blight was reported on tomato near Blacksburg, Virginia this past week.
August 17, 2016
Cucurbit downy mildew update: 8/17/16
The extremely hot, dry weather in areas of New Jersey and the region has kept downy mildew in check the past few weeks. To date, cucurbit downy mildew (CDM) has only been detected on cucumber (Cucumis sativus) in the state. It has been found on cucumber and cantaloupe (Cucumis melo) in southeast PA, the eastern shore of Maryland, and in southern VA. Cucurbit downy mildew has also been reported on butternut squash (Cucurbita moschata) on the eastern shore of VA. Further south it has been reported on watermelon (Citrullus lanatus), cucumber, and cantaloupe in North Carolina. In South Carolina, CDM has been reported on acorn and summer squash (Cucurbita pepo), cucumber, butternut squash, and giant pumpkin. All cucurbit growers are encouraged to scout on a daily basis. Maintenance applications for powdery mildew should already be initiated for all cucurbit crops. Downy mildew specific fungicides should already be incorporated into weekly maintenance applications for cucumber and cantaloupe. Growers of pumpkin, winter and summer squash, and watermelon should remain diligent and scout on a regular basis and begin to consider adding downy mildew specific fungicides into weekly maintenance programs as we head into the fall.
