Propagation of 'Nam Roi' pummelo (Citrus grandis (L.) Osbeck.) by cuttings.

'Nam Roi' pummelo is a famous fruit tree in the Mekong Delta of Viet Nam. Therefore, in recent years, growers extended the cultured area because it guarantees a high income. As a consequence there is a high demand for planting material, and we studied the possibilities of vegetative propagation by cuttings during the period from March 1999 to February 2000. The results of our study showed that a rice husk substrate was better than sand, and that naphthalene acetic acid (NAA) 1000 ppm stimulated rooting (84% rooted). The type of cutting was also a factor affecting the success rate; we studied three types of cuttings.