Revista Brasileira de Fruticultura
Print version ISSN 0100-2945
COSTA JR, Walter Henrique da; SCARPARE FILHO, João Alexio and BASTOS, Débora Costa. Stock plant shading and indolbutyric acid in the rooting of Psidium guajava L.. Rev. Bras. Frutic. [online]. 2003, vol.25, n.2, pp. 301-304. ISSN 0100-2945. http://dx.doi.org/10.1590/S0100-29452003000200030.
This research was carried with the aim of verify the shading influence in the stock plants of two guava cultivars and the use of indolbutyric acid in the rooting of cuttings. The experimental design was in randomized blocks, 2 x 3 factorial, the factors studied were the application of IBA (0 e 2000 mg.L-1) and the shading of stock plants with the percentage of 30 and 50 %, as stock plants growing with plenty of sun. The cuttings were put in an intermittent mist chamber in a green house. After 60 days, the percentage of rooted cuttings were avaliated, as the number of roots per cutting, the percentage of dead cuttings and the percentage of shooted cuttings. It is concluded that the cultivars Rica and Kumagai have different rooting capabilities. The use of 30% of shading in the cuttings for Kumagai provided the best results of rooting. The use of 30% of shading or the application of 2000 mg.L-1 IBA in the cuttings for Rica provided the best percentages of rooting. The use of indolbutiric acid increases the number of roots in the guava cuttings.
Keywords : IBA; propagation; Psidium guajava L.; shading.