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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
It is important to monitor your orchard site for conditions. Photo: Kari Peter, Penn State
Disease Update: More Advice for Limiting Fire Blight Spread - News News
Fire blight symptoms are widespread throughout Pennsylvania and Maryland. Growers are encouraged to use Apogee or Kudos to shut down tree growth to limit the spread of the disease in orchards. 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
Scout for fire blight in your orchard. Photo: Kari Peter, Penn State
Disease Update: Dealing with Fire Blight Infections - News News
Reports of fire blight infections have started to occur. The dos and don’ts of managing fire blight infections are discussed. 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
Bloom is still raging in the orchard. Stay vigilant for disease conditions! Photo: K. Peter, Penn State
Disease Update: Fire Blight and Scab Risk Continues This Week - News News
Bloom is occurring in Pennsylvania apple growing regions—fire blight conditions continue, available mature apple scab spores are very high, and an apple scab infection event is predicted for May 10, 2018. More
Protect your blossoms so they don’t look like this picture in a few weeks! Photo: K. Peter, Penn State
Disease Update: High Alert for Scab and Fire Blight Infection - News News
Severe fire blight and apple scab disease conditions are predicted for May 3–5, 2018! Protection is absolutely necessary! More
Apple bloom is right around the corner. Be on alert! Photo: K. Peter, Penn State
Disease Update: Apple Scab, Fire Blight, and Brown Rot This Week - News News
May 3–5 could be potential infection periods for apple scab and fire blight. Brown rot infection conditions favorable for open peach blossoms this week. More
Don’t get caught with your plants down: watch out for fire blight conditions during bloom. Photo: K. Peter, Penn State
Preparing for the Fire Blight Season - News News
Management strategies are discussed for fire blight, as well as for other important tree fruit diseases occurring during the month of May. More
Source: Steve L. Brown, University of Georgia, Bugwood.org
Tree Fruit Insect Pest - Potato Leafhopper - Articles Articles
Potato leafhopper, Empoasca fabae, is a migratory pest of many crops. It feeds on leaves of rapidly growing apple terminals and may aid in spread of fire blight. More
Protect tart cherries during bloom to prevent cherry leaf spot infection.
Tree Fruit Diseases - Spring Control Strategies - Articles Articles
May is the battleground month for disease management: be on alert for apple scab, fire blight, powdery mildew, rust, cherry leaf spot, brown rot, and bacterial spot infection conditions. More
Brown rot can cause shoot blight. (Photo: K. Peter)
Tree Fruit Diseases - Brown Rot, Fire Blight, Root Rots - Articles Articles
With peach season in full swing, mid-season management strategies are reviewed. More
Pear Disease - Fire Blight
Pear Disease - Fire Blight - Articles Articles
Fire blight is the most serious pear disease in the eastern United States. Caused by the bacterium Erwinia amylovora, the disease can attack some 75 species of plants of the rose family. More
A characteristic symptom of shoot blight is the bending of terminal growth into the shape of a shepherd’s crook. Photo by K. Peter.
Apple Disease - Fire Blight - Articles Articles

Apple Disease - Fire Blight

Kari A. Peter, Ph.D.

Fire blight, Erwinia amylovora, is a destructive disease that can attack some 75 species of plants of the rose family. More
Apple and Pear Disease - Fire Blight, Dormant Removal of Cankers
Apple and Pear Disease - Fire Blight, Dormant Removal of Cankers - Articles Articles
When it comes to managing fire blight, the first line of defense is good sanitation, which is removing the overwintering source for the bacteria: cankers. 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
Be vigilant and scout for apple scab! Photo: K. Peter, Penn State
June Diseases for the Grower Radar - News News
Diseases for the fruit grower radar and their management strategies are discussed as we wrap up May and begin June. 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
Be proactive about fire blight management: Let’s not repeat 2014. (Photo: B. Lehman)
Disease Update: Blossoms Still Open—Fire Blight Risk Continues - News News
Conditions are favorable for fire blight and apple scab. Additional tools for the fire blight management toolbox are 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
Copper sprays need to be applied prior to bud swell to manage peach leaf curl. (Photo: K. Peter)
Disease Update: Copper Sprays and Orchard Sanitation to Manage Diseases - News News
Depending on your location, the warm weather over the last few weeks may have pushed some fruit trees along. For disease management, consider applying dormant copper and urea sprays soon. More
Be sure to remove cankers from trees when pruning. (Photo: K. Peter)
More Tree Fruit Disease Management Tips For 2017: Canker Management - News News
Sanitation is the best offense for disease management, especially when it comes to canker removal. More
Fire blighted flowers. Photo: Gary Moorman
Fire Blight in Ornamentals - Articles Articles

Fire Blight in Ornamentals

Gary W. Moorman, Ph.D.

Fire blight is a disease caused by the bacterium Erwinia amylovora. More
John Hartman, University of Kentucky, Bugwood.org
Home Orchards: Fire Blight Management in Apples and Pears - Articles Articles
Temperatures just before and during bloom will determine if fire blight becomes serious in early spring. More
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