ISHS Acta Horticulturae 683: V International Symposium on New Floricultural Crops
STUDY OF PROPAGATION BY CUTTING OF FIVE SPECIES NATIVE TO SOUTH AFRICA |
| Authors: | P. Frangi, S. Nicola |
| Keywords: | Anisodontea capensis, Euryops chrysanthemoides, Euryops virgineus, Leonotis leonorus, Polygala myrtifolia, IBA, rooting hormone |
| Abstract:
In order to enhance the availability of ornamental species for their introduction in the Italian market, a research of the best propagation protocol of five species from areas with mediterranean climate of South Africa was carried out. Stem tip cuttings of Anisodontea capensis (L.) D.M. Bates, Euryops chrysanthemoides (DC.) Nordenst., Euryops virgineus (L.f.) DC., Leonotis leonorus (L.) R. Br. and Polygala myrtifolia L. were taken at the following times: spring (April), late summer (September) and late autumn (December). The cuttings were dipped into rooting hormone (IBA potassium salt 0.5%) for 5 seconds, 2 minutes or 5 minutes. Generally speaking April resulted in the best time for propagation, followed by December, while the lowest percentages of rooting were obtained in September. In Euryops chrysanthemoides no significant differences occurred among the 3 periods of propagation. IBA increased rooting, with the exception of Euryops chrysanthemoides and Leonotis leonorus that performed well irrespective of hormone treatment. With the exception of cuttings taken in December for Euryops virgineus requiring only a five seconds treatment, a dip of 2 or 5 minutes in IBA solution was necessary to enhance rooting for all the other species. | |
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