EFFECT OF PROMALIN ON ORNAMENTAL MALUS AND PRUNUS SPECIES

The growth regulator Promalin consists of equal parts of 6-benzylamino purine (BAP) and gibberellin A₄₊₇ (GA₄₊₇). It induces branching in several plant species.

It was tried to grow Malus and Prunus cultivars as a short, compact plant suitable for interior decoration. Branching experiments with Promalin, BAP, and GA₄₊₇ on Malus 'Golden Hornet' and on Prunus triloba are discussed. Two reaction types are distinguished. In type one plants react with branching to BAP. Malus belongs to type one. Intype two plants react with branching to GA₄₊₇. Prunus triloba belongs to type two.