The Journal of Horticultural Science & Biotechnology
Vol. 14 No: 3
On Verticillium Wilt of the Perpetual-Flowering Carnation
In a previous investigation (3) of the cause of "wilt" or "stem-rot" disease of the perpetual-flowering carnation it was found that diseased plants were infected by a number of Fusaria. The species most commonly encountered was F. culmorum and inoculation with this fungus reproduced several aspects of the disease. One aspect of the disease—infection through uninjured roots—was not satisfactorily accounted for and it was concluded that "some other factor not present in the above experiment is suspected". Owing to lack of funds the investigation was discontinued.
In 1934, at the invitation of the grower, a visit was paid to the nursery on which most of the previous work was carried out. It was found that the incidence of "stem rot" had assumed more serious proportions and that many diseased plants were affected by a true vascular wilt, with lesions confined to the wood for distances of several feet. This type of plant was very prevalent on this nursery in 1934 whereas in 1927 most of
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