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Proceedings of the International Plant Propagator's Society

Vol. 56

The Propagation of Plant Diseases

Jean L. Williams-Woodward

pp: 614-617


Almost all commercial ornamental production utilizes vegetative propagation to increase plant numbers. As such, the risk of inadvertently propagating disease-infected plants is on the rise. If a plant is infected with a root or crown rot disease, it usually dies or shows symptoms that prevent its propagation via cuttings or division. However, many foliar diseases do not kill the plant and can be present within symptomless leaf or stem tissues. There are several diseases that have become increasingly common on ornamental plants primarily due to either the lack of recognition of disease symptoms or the lack of symptoms at the time of plant propagation. In addition, with the increased use of off-shore production of herbaceous and woody plants, there is an increased risk of introducing new diseases into ornamental nurseries in the U.S.A.

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