Mosaic viruses
Three mosaic viruses infect beans: bean common mosaic, bean yellow mosaic, and cucumber mosaic. Symptoms
may include yellow or green mosaic or mottle patterns of infected leaves, vein banding, and interveinal
yellowing. Leaves may also be distorted, cupped or curled downward, or wrinkled.
SolutionsThis group of diseases is spread from plant to plant by aphids and leafhoppers. It is not practical to
try to control virus diseases by using insecticides to control insects. Aluminum
foil used as a soil mulch
may reduce or delay infections as it helps repel insects from plants. Pull up plants showing symptoms;
they will be unproductive and may allow disease to spread to nearby healthy plants. Keep broadleaf weeds
down, because they may serve as a reservoir of viruses and facilitate spread to beans. Resistant varieties
may be available.
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Mosaic
pattern of bean yellow mosaic virus
Downward
curling of common mosaic virus
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