What's New
What’s New
May 2026
What's Going on My Cedar Trees?
The orange structure in the photo is cedar-apple rust fungus. Several species of Gymnosporangium can cause rust diseases on cedar trees. For more informaiton of Gymnosporangium rust diseases, please read the fact sheet Gymnosporangium Rusts: Common Cedar Rust Diseases.
April 2026
Two New Fact Sheets Published Online
Link to Cherry Leaf Spot fact sheet
Link to Rose Downy Mildew fact sheet
March 2026
What Happend to My Lawn
Gray snow mold is a common fungal disease in late winter especially after prolonged snow cover. Symptoms appear when snow melts, which including gray or bleached grass blades and reddish brown fungal structure on infected leaves. Linked please find a fact sheet Gray Snow Mold of Turfgrass in Home Lawns. For correct disease diagnoses, please send us samples by following the Sample Submission Guidelines.