Dry Bean - Viral Diseases - Alberta Pulse Growers

Dry Bean

Diseases

Viral Diseases

Bean Yellow Mosaic and Bean Common Mosaic Virus (BCMV)

Bean Common Mosaic Virus Plant, Photo Credit: Howard F. Schwartz Colorado State University, Bugwood.org

Bean Common Mosiac Virus Leaf, Photo Credit: Howard F. Schwartz Colorado State University, Bugwood.org

Bean Golden Mosaic Virus (BGMV), Photo Credit: Howard F. Schwarz, Colorado State University, Bugwood.org

CAUSED BY	While infections seldom cause plant death, the impact of yield will depend upon the time of infection, with earlier infections having greater impact. The disease spreads by plant sap contamination of wounds, insects and infected seed. Type and severity of symptoms depend on host cultivar, virus strain and environment. More than 10 strains of BCMV are known. (North Dakota Agricultural Experiment Station).
SYMPTOMS	Infected plants are often stunted, spindly, with few pods set, and may be off colour. Seed will also be off-colour and small. Leaves have irregular areas of yellowish tissue intermixed with areas of green – leaves may be puckered, twisted and elongated.
PREVENTION AND CONTROL	Many commercially available seed varieties have resistance to virus diseases – plant certified seed and control aphids when they appear in large numbers. Fungicides are ineffective in managing viral diseases.

CAUSED BY	While infections seldom cause plant death, the impact of yield will depend upon the time of infection, with earlier infections having greater impact. The disease spreads by plant sap contamination of wounds, insects and infected seed. Type and severity of symptoms depend on host cultivar, virus strain and environment. More than 10 strains of BCMV are known. (North Dakota Agricultural Experiment Station).
SYMPTOMS	Infected plants are often stunted, spindly, with few pods set, and may be off colour. Seed will also be off-colour and small. Leaves have irregular areas of yellowish tissue intermixed with areas of green – leaves may be puckered, twisted and elongated.
PREVENTION AND CONTROL	Many commercially available seed varieties have resistance to virus diseases – plant certified seed and control aphids when they appear in large numbers. Fungicides are ineffective in managing viral diseases.

Special thanks to Saskatchewan Pulse Growers and Manitoba Pulse and Soybean Growers.