Citrus, a collective generic term, comprising a number of species and varieties of fruits, popular at global level for their characteristics flavor and attractive range of colours, citrus fruits are good source of vitamin-C. It is originated from southern slopes of Himalayas, entire north-eastern region of India and adjacent China. Citrus consists of number of species but 8 species are generally cultivated for edible purpose. Citrus is spread throughout the tropics and subtropics, roughly 40°N and 40°S latitudes. The major region subtropical latitude of northern hemisphere is North America, Mediterranean, East Asia including India and southern hemisphere is South America, South Africa, Australia. The total global area on citrus accounts to million hectares producing million tonnes. India covers thousand ha and producing 11655 thousand tonnes of citrus. Northeastern states are accounting 147 thousand hectares citrus groves producing 868 (‘000 tonnes).
