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Gray mold sporulation has a dark gray, concentric ring pattern and may develop lesions on the surface of the plant stems. Photo: Beth K. Gugino, Penn State
Vegetable Disease Update: September 13, 2018 - News News
This fall as temperatures drop, dew periods extend, and the skies remain cloudy, be on the lookout for late blight and Botrytis gray mold in high tunnel tomatoes. More
V-shaped lesions characteristic of black rot on the leaves of cole crops. Photo: Beth K. Gugino, Penn State
Vegetable Disease Update: September 6, 2018 - News News
New reports of cucurbit downy mildew have decreased across the region, but variable weather conditions are forecasted through the weekend. More
Irregular tan cracked lesions characteristic of anthracnose on a cucumber leaf. Photo: Beth Gugino, Penn State
Vegetable Disease Update: August 29, 2018 - News News
The drier conditions the past few days have slowed the epidemic spread of cucurbit downy mildew across the region. More
Powdery (white spots) and downy (dark spots) mildew sporulation on the lower pumpkin leaf surface. Photo: Beth Gugino, Penn State
Vegetable Disease Update: August 23, 2018 - News News
With all the flooding it is important to remember that crops that are exposed to flood waters originating from a stream or river are considered adulterated and should not be harvested for market. More
Downy mildew lesions on pumpkin. Photo: Beth Gugino, Penn State
Vegetable Disease Update: August 1, 2018 - News News
The wet weather is wreaking havoc in many vegetable fields. More
Japanese beetle on raspberries. Photo: Kathy Demchak, Penn State
Vegetable - Small Fruit Production Issues: July 12, 2018 - News News
Downy mildew was confirmed on cucumber in Mifflin County on July 11. Warmer weather throughout the state is helping crops along, but has also been good for insect pests. More
Angular lesions caused by downy mildew. Photo: Beth Gugino, Penn State
Vegetable Disease Update: July 5, 2018 - News News
Downy mildew has most recently been confirmed on cucumber in southern New Jersey and Maryland. Late blight has been confirmed on tomato in York County and on potato and tomato in southern Lancaster County. More
The potato leafhopper, Empoasca fabae, is a pest that is easy to overlook until the damage - called "hopperburn" - "burns" you. Photo: Penn State College of Agriculture
Vegetable - Small Fruit Current Issues: June 28 2018 - News News
Wet weather and variable temperatures across the state continue to be challenging for vegetable and berry production. More
Keep leaves on the tart cherry trees: Postharvest fungicide applications are necessary to limit cherry leaf spot infections. Photo: K. Peter, Penn State
Mid-Season Tree Fruit Disease Update - News News
The latest 2018 disease updates growers need to know for apple scab, fire blight, sooty blotch and flyspeck, bacterial spot, and cherry leaf spot. More
Irregularly shaped late blight lesion on a tomato leaf with characteristic white sporulation on the underside of the leaf. Photo: Beth Gugino, Penn State
Vegetable Disease Updates for Mid-June 2018 - News News
Downy mildew has been confirmed in Dorchester County MD on cucumber, late blight confirmed on tomato transplants, and there have been a number of reports of poor potato seed emergence. More
Black rot on cabbage, caused by the bacterium Xanthomonas campestris pv. campestris. Note characteristic “V” shaped lesions starting at leaf margin. Photo: Lee Stivers, Penn State
Vegetable - Small Fruit Current Issues: Mid-June 2018 - News News
Cloudy weather, rainstorms, and variable temperatures across the state have slowed some crops and created very favorable conditions for disease development. More
Be on alert for apple scab disease conditions until mid-June. Photo: Kari Peter, Penn State
Tree Fruit Disease Conditions Were on Steroids in May - News News
Conditions were incredibly optimal for many tree fruit diseases during the month of May. Management strategies for pome and stone fruit diseases are discussed. More
Fruitlets. Photo: Kari Peter, Penn State
Disease Update: Managing Diseases During Wet Weather - News News
Trees need to be protected during wet conditions. The following are strategies for keeping diseases in check on apple and stone fruit during persistent rainy weather. More
Pepper transplants. Photo: Tom Ford, Penn State
Vegetable - Small Fruit Current Issues: May 18, 2018 - News News
It’s no secret that this spring has been cold and wet across Pennsylvania. On many farms, planting has been delayed as much as three weeks, and many crops already in the ground are developing more slowly than usual. More
Early symptoms of blossom blight. Photo: K. Peter, Penn State
Disease Update: Fire Blight, Scab, Bacterial Spot Conditions Alert - News News
The forecast for May 15–18 indicates conditions will be favorable for apple scab and bacterial spot on peach infections. If infections occurred during bloom, fire blight symptoms could begin to appear this week. More
Map of cucurbit downy mildew currently reported along the east coast as of 26 July 2017 (cdm.ipmpipe.org).
Vegetable Disease Updates for July 26, 2017 - News News
The rainy weather is not letting up and neither is downy mildew pressure. More
Postharvest fungicide sprays are necessary to prevent defoliation from cherry leaf spot. Photo: K. Peter, Penn State
Getting the Upper Hand on Tree Fruit Diseases in July - News News
Conditions may be optimal for several fungal and bacterial pome and stone fruit diseases in July. More
Map of cucurbit downy mildew currently reported along the east coast as of 30 June 2017 (cdm.ipmpipe.org).
Vegetable Disease Updates for June 30, 2017 - News News
Be on the lookout for diseases, as well as timber rot in high tunnel tomatoes, that spread in some of the recent rain events that moved across the Pennsylvania. More
Dormant copper sprays are encouraged to help keep diseases in check. (Photo: K. Peter)
Disease Management Strategies For The Grower Radar - News News
Consider applying dormant sprays soon to manage fungal and bacterial diseases this season. More
Protect any trees still in bloom: Fire blight conditions ideal April 29 through May 2. (Photo: K. Peter)
Fire Blight, Apple Scab, Rust, Plus Others: Be On Alert! - News News
Conditions are optimal for fire blight, apple scab, and rust infections. Growers are encouraged to keep trees protected. Other diseases for the fruit grower radar are also discussed. More
Control for fire blight and apple scab is critical during bloom. (Photo: K. Peter)
Disease Update: Watch Out For Diseases during Apple Bloom - News News
Bloom is well underway in parts of PA and MD. Fire blight and scab disease conditions are in full force now. Growers are encouraged to protect trees. More