There is a lot to see outside this time of year.
Black knot is one of the curiosities that some people are taking notice of lately.
Several examples of this disease were submitted to the ISU Plant Disease Clinic over the past few weeks. It is one of the few diseases that can be diagnosed over the phone because the symptoms are easily recognized. Sometimes the galls will have a whitish powdery coating. Fungal spores are produced on galls that are at least one year old. Young succulent twigs are the most likely candidates for new infections.