Pennsylvania Flower Growers #205
Bacterial slow wilt or stunt, a serious disease of carnation in Europe, was first found in the United States in 1954-55, on carnation plants grown in western New York. In April 1962 it was found on carnations in southeastern Pennsylvania and again in November 1967 in the same range. The disease is caused by a bacterium which has been designated as a strain of Erwinia chrymnlhemi. The disease and the bacterium were first described in England and Denmark. We studied the disease by inoculating rooted car nation cuttings and growing them in the greenhouse for periods of 7 to 9 months. The symptoms described below and illustrated in the accompanying photographs are from these plants. We have also observed most of these symptoms on infected carnation plants growing in a commercial carnation range.
Source: • Pennsylvania Flower Growers #205
Keywords: Disease Symptoms Erwinia chrymnlhemi existing shoots susceptibility