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Proceedings of the International Plant Propagator's Society

Vol. 15

Title:
ROOTING CHEMICALS, LIOUID VS. POWDER, USE, ETC. AND ROOTING MEDIA, NATURAL, ARTIFICIAL, ADDITIVES, ETC.

Authors:
William Flemer III and James D. Kelley

pp: 249-250

Abstract:
Various methods of hormone application used were tabulated as follows:
     Soak Treatment — 11 participants
     Quick Dip — 9 participants
     Talc Treatment — 24 participants
     Soak Treatment — Reports of 18 hour soak, cuttings were bundled with rubber bands during soaking in idolebutyric acid solutions. Such solutions were usuable for two days before discarding was necessary.

Hormones in general were not found to be useful for improving rooting of hard wood cuttings. There were two exceptions reported in which deciduous hard wood cuttings of Berberis thunbergi Crimson Pygmy in which hormone soak in IBA greatly increased rooting percentages. A Dutch paper was also cited which indicated that Laburnum vossi hard wood cuttings rooted better with hormone treatments.

David Leach observed that: "Theoretically the activity of any hormone should double with every 10°C temperature increase but this does not appear to be strictly so." Comments from the floor bore out this contention of increased

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