Low-technology techniques for the vegetative propagation of tropical trees.
Stem cuttings of 5 tree species from dry and semi-arid woodlands (Acacia tortilis, mesquite, Terminalia spinosa, Terminalia brownii and Albizia guachapele) and 7 species from moist tropical forests (Cordia alliodora, Vochysia hondurensis, Nauclea diderrichii, Ricinodendron heudelotii, Lovoa trichilioides, Gmelina arborea, and eucalyptus) have been easily rooted in improved low-technology, high humidity polythene propagators in Kenya, Cameroon, Costa Rica and the UK. Experiments have tested different rooting media, auxin applications and compared mist versus non-mist propagation. Assessments of the physical and gaseous environment of the propagators indicated ways of improving the rooting environment through an understanding of the sensitivity of the relative humidity to radiant energy and to opening the propagator for short periods (e.g. 2-3 min). From authors' summary. KEYWORDS: TROPAG | Prosopis juliflora Eucalyptus deglupta Terminalia | Acacia tortilis Cordia alliodora Ricinodendron heudelotii | Miscellaneaous Crops and Forestry | trees | cuttings | rooting | Kenya | Cameroon | Costa Rica.