Effects of Poncirus trifoliata interstocks (5-10-20 cm) and budding bights (15-25-35 cm) were studied for Valencia orange on Rangpur ume rootstock. The trial, carried out from 1984 to 1992, led to the following conclusions: 1) insertion of Poncirus trifoliata interstocks resulted in reduction of plant size, production precocity and yield; 2) vegetative development and yield of valencia orange plants were not affected by different budding highs and by Poncirus trifoliata interstock extension.
citrus; interstock; budding height; Valencia orange