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Proceedings of the International Plant Propagator's Society

Vol. 50

Influence of Misting Interval and Hormone Concentration for Propagation of Native Azaleas

Shani L. File, Patricia R. Knight and Robert F. Brzuszek

pp: 546-550

Fifteen cm (6 inch) terminal softwood cuttings of Rhododendron austrinum (Small) Rehd. were taken 28 April 2000, from an established native stand at the Crosby Arboretum in Picayune, Mississippi. All cuttings were placed in a propagation house under two intermittent mist regimes: 8 sec 4 min-1 followed by 6 sec 6 min-1, or 4 sec 2 min-1 followed by 2 sec 4 min-1. Cuttings were daily misted from 8:00 to 16:30. The experiment was a two-way factorial (auxin concentration 5 mist interval) arranged in a randomized complete block design. Six single plant replicates were utilized. The auxin used was K-salt of IBA (K-IBA). Cutting vigor at approximately 2 months after sticking was not influenced by K-IBA concentration or misting interval. Root length and root ratings were not influenced by misting interval, but there was an interaction between K-IBA concentration and misting interval for root number. As K-IBA concentration increased, the lower mist intervals produced more roots.

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