Influence of ethephon and indole butyric on the rooting of stem cuttings of guava (Psidium guajava L.)The objective of this work was to evaluate the influence of ethephon, indole butyric acid (IBA) and substrate on root formation of guava stem cuttings. Orchard plants withfive years old were sprayed with ethephon in concentrations of zero, 50 and 100ppm. However, after seven days, stem cuttings were made, of the last lauching with three knots by cutting including one pair of leaves. Cuttings were treated with concentrations of zero, 1000, 2000. 3000 and 4000ppm of liquid IBA by immersion of two centimeter of the basis of cutting for five minutes. Vermiculite and ash rice were used as substrato. Results showed that the use of vermiculite produced greater percentage of cuttings rooted (21.48%). A greater cutting rooted and number of roots were obtained using ethephon and IBA.
propagation; substrates; spray
