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Downy mildew on pumpkin. Photo: Beth K. Gugino, Penn State
Vegetable Disease Updates: August 30, 2017 - Articles Articles
Within the past week, there have been three separate reports of downy mildew on jack-o-lantern pumpkin in eastern Virginia. More
Home Garden: Fire Blight
Home Garden: Fire Blight - Articles Articles

Home Garden: Fire Blight

Gary W. Moorman, Ph.D.

Fire blight is a disease caused by the bacterium Erwinia amylovora. 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
Gerald Holmes, California Polytechnic State University at San Luis Obispo, Bugwood.org
Downy Mildew - Articles Articles

Downy Mildew

Gary W. Moorman, Ph.D.

Downy mildew is the common name for a group of highly specialized obligate parasites of vascular plants. More
Grape Disease - Downy Mildew
Grape Disease - Downy Mildew - Articles Articles
Downy mildew, Plasmopara viticola, can infect berries, leaves and young shoots. It occurs wherever it is wet and warm during the growing season. 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
Penn State Department of Plant Pathology & Environmental Microbiology Archives, Penn State, Bugwood.org
Fire Blight in Home Apple and Pear Orchards - Articles Articles
Fire blight is destructive to apple and quince trees and is the most serious pear disease in the eastern United States. More
Penn State Department of Plant Pathology & Environmental Microbiology Archives, Penn State, Bugwood.org
Fire Blight in Home Orchards - Articles Articles
Fire blight overwinters in cankers on branches and trunks. When the temperature reaches about 65°F, bacteria begin to multiply and appear on the outsides of the cankers as clear amber ooze. 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
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
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
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
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
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
Left: gray mold; right: anthracnose fruit rot.
Strawberry Disease - Fruit Rot Protection Begins at Bloom - Articles Articles
Our two main targets for bloom time protection of strawberries are gray mold/ Botrytis fruit rot, and, if you are growing susceptible varieties like Chandler, anthracnose fruit rot. More
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