Bean yellow mosaic virus

Family   : Potyviridae
Genus    : Potyvirus
Acronym  : BYMV

Introduction

Bean yellow mosaic virus (BYMV) is a plant pathogenic virus belonging to the genus Potyvirus. BYMV is a monopartite flexuous rod shaped virus with positive-sense, single-stranded RNA surrounded by a capsid made for a single viral encoded protein. Bean virus 2, Gladiolus mosaic virus, Gloriosa stripe mosaic virus are few synonyms.

Major Diseases

Mosaic disease/Streak Disease

Geographical Distribution

Wide spread in India.

Particle Morphology

A virus with flexuous particles about 750 nm long.

Transmission Method

Transmitted by a vector Aphis fabae, A. gossypii, Brevicoryne brassicae and Myzus persicae(Aphididae) in a non-persistent manner. Virus is also transmitted by mechanical inoculation and by seed.

Detection

Reverse transcription-polymerase chain reaction (RT-PCR) using Bean yellow mosaic virus (BYMV) specific primers and ELISA.

Host Range and Symptomatology

Host	Symptoms
Phaseolus vulgaris and Pisum sativum	Tip necrosis, mosaic.
Vanilla planifolia (vanilla)	Severe yellow mosaic and leaf distortion.
Gladiolus plants	Mosaic, colour breaking,stunting of spikes and reduction in flower size.
Freesia	Chlorotic spots on leaves.
Dutch Bulbous Iris	Mosaic, leaf curling, mottling and flower deformation. iris plants growing.
French bean	Chlorotic spots on leaves.
Vicia faba	Mosaic, leaf curling.
D. metel	Vein clearing, mosaic, leaf puckering, distortion and filiform leaves.

References

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