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Figure 1. Lodged corn seen from a distance.
Corn rootworms Suspected of Resistance to Bt Corn Varieties Discovered - Articles Articles
Western corn rootworms that developed resistance to some Bt corn varieties may now be a problem in PA. More
Rose Black Spot
Rose Black Spot - Articles Articles
A common disease of roses called black spot is caused by the fungus Diplocarpon rosae. This fungus readily attacks young expanding leaves and young canes. More
Pseudomonas syringae: A common pathogen on woody plants
Pseudomonas syringae: A common pathogen on woody plants - Articles Articles
The bacterium Pseudomonas syringae, is an opportunistic pathogen which attacks a wide variety of woody plants especially when they are damaged by frost or injury. More
Phytophthora on African violet
Phytophthora Root Rot On Woody Ornamentals - Articles Articles
Fungus-like organisms belonging to the genus Phytophthora are soil- or plant-borne and all are plant pathogens. More
Scheduling Disease Control In Woody Ornamentals
Scheduling Disease Control In Woody Ornamentals - Articles Articles
The scheduling of effective disease management measures is not a simple task nor can it be standardized. More
Tree Diseases that Create Hazards
Tree Diseases that Create Hazards - Articles Articles
Certain diseases of trees weaken their structure and create a hazardous situation where serious damage could result from falling limbs or the toppling of the entire tree. More
Wilting maple
Verticillium Wilt of Woody Ornamentals - Articles Articles
Most deciduous trees and shrubs are susceptible to a disease called Verticillium wilt caused by the fungus Verticillium. Conifers do not appear to be susceptible. More
Pieris Diseases
Pieris Diseases - Articles Articles
Informational table showing disease name, symptoms, pathogen/cause, and management of Pieris diseases. More
Pyracantha Diseases
Pyracantha Diseases - Articles Articles
Informational table showing disease name, symptoms, pathogen/cause, and management of Pyracantha diseases. More
African Violet Diseases
African Violet Diseases - Articles Articles
Informational table showing disease name, symptoms, pathogen/cause, and management of African Violet diseases. More
Amelanchier Diseases
Amelanchier Diseases - Articles Articles
Informational table showing disease name, symptoms, pathogen/cause, and management of Amelanchier diseases. (Shadbush, Serviceberry) More
Aglaonema Diseases
Aglaonema Diseases - Articles Articles
Informational table showing disease name, symptoms, pathogen/cause, and management of Aglaonema diseases. More
Scott Bauer, USDA Agricultural Research Service, Bugwood.org
Plum Pox Virus In Ornamentals - Articles Articles
Plum pox is a serious disease of Prunus species caused by a virus. More
Powdery mildew on Poinsettia
Powdery Mildew - Articles Articles

Powdery Mildew

Gary W. Moorman, Ph.D.

Powdery mildew occurs on many different flowers, woody ornamentals and trees. More
Norfolk Island Pine Diseases
Norfolk Island Pine Diseases - Articles Articles
Informational table showing disease name, symptoms, pathogen/cause, and management of Norfolk Island Pine diseases. More
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