European Journal of Plant Pathology (2009) 124, 691-694

Rudra P. Singh, Andrea D. Dilworth, Xiaoping Ao, Mathuresh Singh and Virendra K. Baranwal (2009)
Citrus exocortis viroid transmission through commercially-distributed seeds of Impatiens and Verbena plants
European Journal of Plant Pathology 124 (4), 691-694
Abstract: Surveys of Impatiens and Verbena species in local nurseries in Fredericton, Canada and Verbena species in New Delhi, India showed widespread infection of Citrus exocortis viroid (CEVd) in vegetatively-propagated and seed-grown plants. To determine viroid seed transmission, samples of eight varieties of Impatiens and 11 varieties of Verbena were obtained from four commercial sources. All 19 samples collected contained viroid infection irrespective of variety. The presence of viroid in non-germinated seed was 21%, while the transmission rate in seedlings was 66% in Impatiens walleriana in 2006. Following 2 years of seed storage, the respective figures were 6% and 26%. Similarly, in Verbena x hybrida the presence of viroid in seed was 13% in 2006 with a seed-transmission rate in seedlings of 28%, while the respective figures after 2 years of storage were 5% and 45%.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Rudra P. Singh, Virendra Kumar Baranwal

Research topic(s) for pests/diseases/weeds:
transmission/dispersal of plant diseases

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Citrus exocortis viroid	Impatiens (crop)	Canada (east)
	Citrus exocortis viroid	Verbena (crop)	Canada (east)
	Citrus exocortis viroid	Verbena (crop)	India