During recent years oilseed rape (Canola-Brassica napus) cultivation has gained an importance in different geographical zones in Iran. Viral diseases of economic importance have been reported to infect canola crop and causes considerable damage to the crop and economic losses to the farmers. During different surveys, various and common symptoms of mosaic ,reduction in overall plant growth, flower and pod formation disorders, necrotic spots on leaves and stem , leaf distortion and yellowing, leaf crinkling and mid rib narrowing were observed in canola diseased plants in the field. Cauliflower mosaic-CaMV, Beet western Yellow-BWYV and Turnip mosaic-TuMV viruses were accordingly the most prevalent and common viruses identified in different cultivation zone. Other viruses of less common importance were also identified. Different biological, serological and molecular approaches were applied to identify and partially characterized the viral diseases and related isolates. Comparatively Hyola 308 cultivar showed better and faster recovery from an isolates of CaMV diseased symptoms in glass house condition. The overview highlights the past and present ongoing research and achievements on status of viral diseases of canola crops in Iran.
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