This agriculture extension service publication from Pennsylvania State University covers the identification and control of common ornamental trees, shrubs, and ground cover diseases. The publication is divided into sections. The first section discusses the diseases of ornamental and shade trees, including general diseases and diseases of specific plants. The second section discusses the diseases of shrubs, vines, and ground covers, including general diseases and diseases of specific plants. The third section discusses control measures for the plant diseases listed in the previous sections. Most of the information in this publication is grouped under specific plants and the plants are alphabetized for easy referral. Also, a small fourth section listing disease resistant of trees and discussing mixing preparations of wettable powder fungicides is included. (MR)