Tomato mosaic virus is one of the oldest plant viruses in tomato plant. It spreads extremely easily and can be destructive to plants, mainly to the tomato. It is hard to find the symptoms of mosaic virus on tomato plant. Tomato mosaic virus symptoms could be found at any stage of growth and all parts may be infected. They are often seen as a general mosaic appearance on surface of the plant. When the plant is severely infected, leaves may become stunted as shown in Figure 13.2.

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Figure 13.2   (a) Green and yellow mosaic pattern on leaf infected with tomato mosaic virus (TMV). (b) Tobacco mosaic virus symptoms on a tomato seedling.

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