The following are highlights and updates about samples and questions recently received in the Plant and Insect Diagnostic Clinic. Visit the PIDC's Facebook page for updates and more pictures. For more information on a particular disease or insect problem listed, follow the article (hyperlink) cited.
Plant Diseases and Insect Damage
The following highlights represent recent sample submissions from fruit, vegetables, and ornamental plants.
Oak - bur oak blight
Maple, Tar spot, Physiological scorch, physical injury (crack)
Willow, willow leaf spot
Pine, bark beetle damage
Ornamentals Perennials and Annuals
Rose - rose rosette disease
Viburnum - powdery mildew
Ornamental pear, Botryophaeria canker
Pumpkin, Bacterial Leaf and Fruit Spot, Powdery mildew, Aphids
Links to this article are strongly encouraged, and this article may be republished without further permission if published as written and if credit is given to the author, Horticulture and Home Pest News, and Iowa State University Extension and Outreach. If this article is to be used in any other manner, permission from the author is required. This article was originally published on October 4, 2017. The information contained within may not be the most current and accurate depending on when it is accessed.