Diseases

This Web site mirrors the 104-page printed guide, which summarizes insect, mite, and disease management practices for woody ornamentals and shade trees. The three major topic areas are pesticide safety, insects and mites, and diseases.

This 90-page pocket guide with 100 color photographs shows stages of diseases that afflict 17 popular trees and shrubs. Nursery owners, landscapers, and homeowners can use this reference to learn how to scout for fungus and bacteria and manage diseases once they are identified.

Pennsylvania’s community forests are among our greatest natural assets. Trees in our neighborhoods and towns help keep us healthy, grace us with their elegance and beauty, and provide us with clean water and air.

This is a listing of fact sheets available on common diseases of plants frequently grown in greenhouses, interiorscapes, and in outdoor landscapes and nurseries in the northeastern U.S. Since many other diseases and disorders are known to occur and new diseases are recorded frequently, this compilation should not be considered complete. The main purpose of this publication is to provide information helpful in the diagnosis of diseases and to give some indication of what measures must be taken to manage the problem. All files are in PDF format, unless otherwise noted.