Abstract: The benefits of cloning reinforce the necessity of increasing the efficiency of cacao grafting. Our objective was to test the feasibility of using Indole-3-butyric acid (IBA) in grafting. We grafted seedlings of the TSH 1188 rootstock with scions of three clones: SJ 02, CCN 51 and PH 16, which had their basal portion emerged into solutions containing IBA at varying concentrations: 0, 100, 200,400 and 800 mg L-1 of IBA. The trial was carried out in completerandomized blocks, with five replicates, and analyzed in factorial arrangement. We measured theleaf area, survival ratio and total dry mass of each grafted seedling. After assessing the factors’ significance, we fitted polynomial equations (for significant dose effect)and compared the means for significant clone effect. IBA dosage significantly affected all traits. Higher dosages improved the survival rate but reducedleaf area until an inflexion point was reached. The clones exhibited distinct survivalrates and total dry masses. The total dry mass was the only trait in which the clone x dosage interaction effect was significant. Since the IBA effects were not uniformly beneficial across all clones and traits, we do not recommend its usage incacao’s scion in the grafting process.
Chaves et al. (Wed,) studied this question.
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