الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Tomato (Solanum lycopersicum) is a major crop of world economy. It’s one of the most important commercially grown vegetables in Egypt, which cultivated through the whole year. One of the most important problems affecting tomato production in many countries is susceptible to many viruses, which causes yield losses, and diminished fruit quality that can occur due to single or multiple viral infections.
Tomato Mosaic virus (ToMV) is widespread all over the world wherever tomato is grown. ToMV is the type member of the genus Tobamovirus, Family Virgaviridae. ToMV disease can be diagnosed during any growth stage and all plant parts are affected. It causes a light or dark green mottling or mosaic, with distortion of younger leaves, systemic chlorosis, local necrotic lesions and fruit set may be severely reduced in affected plants, and there may be internal browning of the fruit wall.