Plant and Insect Diagnostic Clinic Update

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 to ask questions and for updates and more pictures. For more information on a particular disease or insect problem listed, follow the article cited.
Coniferous Trees
Rhizosphaera needle cast in various spruce types
Fall needle drop
Environmental / abiotic stress in pine
Perennials and Annuals
Phytophthora shoot blight in Lilacs (see article in this issue)
Coniferous Trees
Spruce spider mites

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 December 9, 2016. The information contained within may not be the most current and accurate depending on when it is accessed.