Watching for Rose Mosaic Virus

Watching for Rose Mosaic Virus

Variegated foliage in roses is not a good thing.   While yellow and green patterning of leaf tissue can indicate the presence of a fungal disease, sometimes it can also signal that a virus condition is at work.  The viral disease commonly known as “Rose Mosaic” is a...
Collecting Plant Specimens

Collecting Plant Specimens

At some point the day comes when a plant gets sick and presents with unfamiliar symptoms. While it is possible to conduct exhaustive internet searches, it is unlikely that such searches are either efficient or result in an accurate diagnosis. For example, pests,...
Identifying Crown Gall Disease

Identifying Crown Gall Disease

Crown gall is the only serious bacterial disease that affects roses. It is found worldwide attacking some 140 plant genera in 60 different families, including rosa. Crown gall is caused by the bacteria, Agrobacterium tumefaciens, which is found in most agricultural...