Chrysanthemum virus B

Family   : Betaflexiviridae
Genus    : Carlavirus
Acronym  : CVB

Introduction

A virus widespread throughout the country in cultivated varieties of chrysanthemum. Chrysanthemum dwarf mottle virus, chrysanthemum mild mosaic virus, chrysanthemum necrotic mottle virus, chrysanthemum vein mottle virus, chrysanthemum virus Q are few strains usually present.

Major Diseases

Mild leaf mottling Disease/Chlorosis and Necrosis Disease

Geographical Distribution

Chrysanthemum growing regions, especially in Himalayan region.

Particle Morphology

A virus with flexuous particle of about 685 nm long.

Transmission Method

Transmitted by a vector Myzus persicae; Transmitted in a non-persistent manner. Virus transmitted by mechanical inoculation; transmitted by grafting; not transmitted by contact between plants; not transmitted by seed.

Detection

Enzyme linked immunosorbent assay (ELISA), northern hybridization and reverse transcription polymerase chain reaction (RT-PCR).

Host Range and Symptomatology ShowHide

Host	Symptoms
Chrysanthemum	Prominent green vein banding, mild leaf mottling, chlorotic and/or necrotic spots on leaves and occasional flower distortion.
N. clevelandii, N. glutinosa, N. rustica, Petunia hybrida and Vicia faba	Mild leaf mottling, chlorotic occasional flower distortion.

References ShowHide

1	Chrysanthemum virus. [Distribution map].. 2003, Distribution Maps of Plant Diseases, April (Edition 1), pp Map 880.
2	Lakhmir Singh ; Vipin Hallan ; Martin, D. P. ; Raja Ram ; Zaidi, A. A., Genomic sequence analysis of four new chrysanthemum virus B isolates: evidence of RNA recombination.. 2012, Archives of Virology, 157, 3, pp 531-537.
3	Singh, B. P. ; Gupta, R. P. ; Abidi, S. M. H. ; Raizada, R. K., Chlorotic mottle of Chrysanthemum morifolium (Ram.) Hemsl - a new record from India.. 1978, Current Science, 47, 23, pp 913-914.
4	Singh, L. ; Hallan, V. ; Jabeen, N. ; Singh, A. K. ; Ram, R. ; Martin, D. P. ; Zaidi, A. A., Coat protein gene diversity among Chrysanthemum virus B isolates from India.. 2007, Archives of Virology, 152, 2, pp 405-413.
5	Verma, N. ; Mehra, A. ; Singh, L. ; Hallan, V. ; Singh, A. K. ; Jabeen, N. ; Singh, M. K. ; Ram, R. ; Zaidi, A. A., Screening for viruses infecting chrysanthemum cultivars in India.. 2007, Scientia Horticulturae, 111, 3, pp 260-265.
6	Verma, N. ; Sharma, A. ; Raja Ram ; Hallan, V. ; Zaidi, A. A. ; Garg, I. D., Detection, identification and incidence of Chrysanthemum B carlavirus in chrysanthemum in India.. 2003, Crop Protection, 22, 2, pp 425-429.
7	Zaidi, A. A. ; Hallan, V. ; Rana, T. ; Raikhy, G. ; Ram, R., Viruses in ornamental crops and their management: an Indian scenario.. 2009, Journal of Ornamental Horticulture, 12, 3, pp 147-166.

Sequences ShowHide