Trichilia catigua A. Juss contains substances with astringent, insecticidal, purgative, tonic, bactericidal, anti-inflammatory and anti-depressive properties in its barks. This study aimed at rooting of hardwood cuttings of this species in different seasons. Stem cuttings -about 15 cm long- were collected from adult trees and were prepared from the apical and medial part of the branches. The cuttings were treated with the plant regulators AIB (indole-3-butyric acid), NAA (naphthalene acetic acid) and IAA (indole-3-acetic acid). The percentage of rooted or dead stem cuttings was determined; when rooting was successful, length and diameter were measured. In the spring of 2004 stem cuttings were treated with concentrations of 1000 and 2000 mg L-1 of IBA, NAA and IAA and evaluated after 90 days. The greatest rooting percentages were 33.33, 25.00, 22.91 and 23.43% with IBA 1000, 2000 mg L-1 and NAA 1000 and 2000 mg L-1, respectively. In the summer, fall, winter and spring of 2005 the experiments were carried out with IBA, NAA and IAA in the concentrations of 1000, 2000 and 3000 mg L-1 and the evaluations done at 120 days. The higher rooting percentage, 19.17%, was obtained with IBA at 3000 mg L-1. In the spring of 2006 IBA at doses 1000, 2000, 3000, 4000 and 5000 mg L-1, and NAA at 1000, 2000 and 3000 mg L-1 were tested. The greatest rooting percentage was 41.67%, and was obtained with the use of 5000 mg L-1 of AIB.
Indole-3-butyric acid; medicinal plant; wood cutting
