Introduction After a phytopathological analysis 2004, has established that in infectious patterns (samples) is revealed the white rust of chrysanthemums disease, which is the pathogene of fungus Puccinia horiana Henn.  Alfer ten years the disease has been identifi ed for the collection of the Botanical Garden chrysanthemums. The disease is the subject of external quarantine. Chrysanthemums are the only host, especially the fl orists’ cultivars, widely cultivated in glasshouses in the EPPO region. Chrysanthemums white rust is an autoecious (aboriginal) species of pathogene for Japan and China, from where it was spread to Asia, South Africa, and Europe. As follows from the data in the literature, the white rust on chrysanthemums is wide spread in Poland, France, Italy, Israel, China, Japan, etc. Epiphytotic disease progression was noted in the greenhouses in England, Denmark, and France [1]. Material and methods Infectious material was obtained from the greenhouses of the private farming, village of Yaloveni, engaged in cultivation of chrysanthemums and diseased plants from the collection of the Botanical Gardens. The initial planting material was imported from Poland. Investigations were carried out only in the conditions of mycological box and after fi nalization the work the specimens were totally destroyed, used tools and utensils were washed and sterilized. Determination of the fungal pathogene of the disease was performed by morphological characters of spores (shape, size, color) according to special methods. Results and discussions The fi rst symptoms appeared on young leaves. On the top of the leaf reveals small pale yellow spots. The symptoms at this stage remind signs of disturbance of mineral nutrition. However, in case of infection Puccinia horiana, occurs rapidly the modifi cation of symptoms. Chrysanthemum white rust is extremely diffi cult and costly to eradicate. The intensifi cation of chrysanthemum production, with high plant densities in humid glasshouses, provides an ideal environment for the fungus.  Chrysanthemum white rust is extremely diffi cult and costly to eradicate. The intensifi cation of chrysanthemum production, with high plant densities in humid glasshouses, provides an ideal environment for the fungus. The fungus can be positively identifi ed on the basis of symptoms and morphological features. In the case of weak degree of affection on the spots are formed single pustules up to 5 mm, at a strong degree of affection are numbered hundreds of small pustules on the leaf. The fi rst symptoms appeared on young leaves. On the top of the leaf reveals small pale yellow spots. The symptoms at this stage remind signs of disturbance of mineral nutrition. The agent of chrysanthemums white rust is the fungus Puccinia horiana, highly specialized haustoria and it has no intermediate host. Stage of uredospores is absent, the infection occurs from basidiospores. Conclusions Planting material of chrysanthemums, 2004 imported from abroad, demands the strict quarantine inspection. It was established that the pathogene was introduced initially by planting varieties of chrysanthemums Reagan purchased in Poland.  Alfer ten years the disease has been identifi ed for the collection of the Botanical Garden chrysanthemums.