The lone discovery of plum pox virus in a peach tree in Michigan State University’s tree fruit breeding program puts significant constraints on the program, but it’s not all “gloom and doom,” says Bill Shane. The virus, found last July at the Southwest Michigan Research and Extension Center in Benton Harbor, has resulted in the testing of more than 12,000 susceptible trees at the station and will require that most of the trees be removed. As of press time for Good Fruit Grower, quarantine regulations were not yet issued, although state officials expect that movement of Prunus material within about […]