Totamato (Lycopersicon esculentum Mill.) is one of the most popular vegetable and is the world’s largest vegetable crop after potato and sweet potato. It is said to be the native of tropical America. World produces around 117 million tons of tomatoes from an area of 43 lakh hectares (average of 2001 to 2005). Globally, China is the largest tomato producing country almost contributing for 25% of world’s tomato production. The production in China during 2005 was During 2005 China was 31.64 million tons followed by USA with 12.76 million tons, Turkey 9.7 million tons, Italy 7.81 million tons and India and Egypt each with 7.6 million tons. These six countries contributed for around 60% of world’s tomatoes production.

Potato (Solanum tuberosum L.) is a major food crop grown more than hundred countries of the world. It is believed that potato was a native of Andes in South America and gradually spread throughout the world. The dry matter, edible energy and edible protein content of potato makes it nutritionally superior vegetable as well as staple food throughout the world. The constituents of potato per 100 gms are as follows.

Onion (Allium cepa) is a popular vegetable grown for its pungent bulbs and flavorful leaves. Onion are consumed raw, boiled, fried or as pickle. Also used in medicines and as a flavouring agent. It is widely grown throughout the world. Onions are native to Asia and the Middle East and have been cultivated for over five thousand years. The world produces around 500-550 lakh tons of onion annually. World production stood at 579 lakh tons from an area of 31.80 lakh hectares in 2005