ABSTRACT
Citrus is a major group of fruit crop that belongs to the family Rutaceae. Citrus is grown all over the world and is a highly valued crop. Citrus broadly includes lime, lemon, orange, mandarin, grape fruit, and pummelo groups. Since citrus is grown all over the world, it has a huge diversity in its cultivars and botany. Citrus is an acidic fruit rich in nutrients and is non-climacteric in nature. This chapter would provide the detailed discussion about the area and production of different citrus groups, composition and use of citrus, origin and distribution, botany and taxonomy, citrus classification, varieties and cultivars, breeding and crop improvement, soil and climate, propagation and rootstock, layout and planting, irrigation, 64nutrient management, training and pruning, intercropping, weed management, mechanism of citrus flowering, flowering, pollination and fruit set, fruit growth and development, fruit retention and fruit drop, harvesting and yield, postharvest technology, disease, and pest and physiological disorders of the citrus group.
