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Tomato Research Paper

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Tomato is one of the important crops of family Solanaceae and is widely cultivated in tropical, sub-tropical and temperate climates. It holds second ranks in terms of world vegetable production after potato (FAO 2006). Tomatoes have been used as food by the population of Central and South Americas since prehistoric times (Choudhoury, 1967). All tomato varieties in Asia and Europe are supposed to be descendants of the seeds taken from Latin America to Europe and Asia by the Spanish and the Portuguese merchants during the 16th century. Moreover, African tomatoes were introduced by European merchants. Modern tomato cultivars and hybrids can be grown and can produce fruit in climates far different from the place of its origin. …show more content…
Low yield of tomato is might be due to (1) pests and diseases; (2) poor fruit setting due to heavy rains and excessively high temperatures, and (3) lack of improved varieties (Villareal 1979; Lyons et al. 1985). Diseases are major concern to processing and fresh market tomato industries throughout the world to decrease economic losses due to crop damage hence disease control methods are significant. Tomatoes are susceptible to several diseases caused by pests, bacteria (Xanthomonas campestris, Pseudomonas syringae, Corynebacterium michiganensis, Pseudomonas solanacearum etc), root-knot nematodes (Meloidogyne spp.), fungi (Phytophthora infestans) and viruses (Villareal & Lai 1979). Tomato is vulnerable to more than 200 diseases, out of which 40 are caused by viruses. Several viruses, Tobacco mosaic virus (TMV), Tomato leaf curl virus (TYLCV), Cucumber mosaic virus (CMV) and Potato virus Y (PVY) are known worldwide to attack tomatoes causing serious damage and yield reduction (Sawalha …show more content…
Most viruses transmit by insect vectors; however, they can also be transmitted through exposure of plant wounds to infected sap. In insect transmission, plants become infected by the biting, sucking and feeding activities of the insects such as whiteflies, aphids, thrips, mites, and leafhoppers that carry viruses (vectors). Once virus gets inside the plant, multiplies and spreads throughout the

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