Around the world, there are many ornamental plants found in urban landscapes for both decorative and practical purposes. In the global horticulture industry, they are valued for their aesthetic properties and they are important because they play a prominent role in the field. Viruses, both infectious and non-infectious, cause severe diseases to ornamentals, both ornamental and non-ornamental species of different taxonomical types, and cause both a reduction in decorative value and a reduction in the quality of propagated material, and cause considerable economic loss. In recent years, the ornamental plant market has seen significant growth which has facilitated the spread of diseases. In light of this, it is urgent that data on viruses and viroid phytopathogen diversity in these cultures are organized and systematized to facilitate future research. Chrysanthemums, roses, clematis, cannas, and lavender are among the most popular ornamental plants. Until now, there have been over fifty viruses and viroids discovered in these crops (and from four different families including two viroid families). We examined the variety of pathogens that are associated with the above-mentioned ornamental plants and then described their effect on the ornamentals involved.
Key words: Chrysanthemum, clematis, canna, rosemary, chrysanthemum virus, chrysanthemum viroids
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