The 2011 ASHS Annual Conference

<i>Adenium obesum</i> belongs to the family Apocinaceae, they are succulent  plants, normally they possess juicy stems and leaves, as consequence of a water storage in his tissues. Generally they are own plants of places with few rainfall. These plants also answer to the asexual multiplication and in addition they can multiply for seeds. One the chemical substances that have been like more effective to stimulate the production of adventitious roots in stakes is the indolbutiric acid (IBA). The aim of this experiment was to determine the ideal concentration of indolbutíric acid in the asexual spread of <i>A. obesum</i> for cuttings. It was carried out  in  the  commercial  nursery "The Ceiba " placed in the city of Caleras, Colima, Mexico. Since vegetative material cuttings were used apicales of parent plants of <i>A. obesum</i>, with length of 15 cm, placed in handles with a mixture of fine dust of coconut and land of slime, in relation 2:1 v/v. The concentrations that constituted the evaluated treatments were: 0, 750, 1500, 3000, 6000, 9000, 10500 and 12000 ppm of the commercial product RADIX "IBA 35 %". The basal ends of the cuttings submerged during ten seconds in IBA solutions. To disinfect the handles, they were immersed in a basin by water by chlorine to 5 %. The fine dust of coconut I wash two times to lower the electrical conductivity. The cuttings stood firm and placed in tunnel of taken root and under mesh with 30 % of shade. The experimental design was completely at random, with eight treatments and ten repetitions; the experimental unit was formed by one plant. The evaluated variables were the number of leaves for cutting and survival of cuttings.  The results indicate that the best treatment after 60 days, was of 3000 ppm with 90 % of alive cuttings; those of 1500 ppm and 750 ppm turned out to be equal with 80 % of alive cuttings and finished intervals; the witness concluded with 60 % of alive cuttings, Other treatments presented inhibition, dehydration and death of cuttings.