Vimses cause small yields of poor quality, and some strains can quickly kill a plant. Mosaic vimses are so called because chlorophyll is destroyed, causing areas of yellowing on leaves.
The mosaic virus, shown here on a turnip plant is often spread by aphids
Another type of vims blocks up a plant's vascular system, restricting the flow of water and nutrients. Conditions known as leaf curl can result, w ith symptoms that may include dwarfing or excessive branching.
Methods of control usually involve eliminating the factors that permit vimses to spread. There is little that can be done to restore the health of an afflicted plant.
The removal and burning of infected leaves or branches can be used as a control method.
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