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2019 ASHS Annual Conference

Hardwood Propagation of Delta Jazz™ Crape Myrtle

Wednesday, July 24, 2019: 1:30 PM
Partagas 3 (Tropicana Las Vegas)
J. Skylar Baldwin, Mississippi State University, Mississippi State, MS
Jenny B. Ryals, Mississippi State University Coastal Research and Extension Center, Poplarville, MS
Patricia R Knight, Mississippi State University Coastal Research and Extension Center, Poplarville, MS
Scott A. Langlois, Mississippi State University Coastal Research and Extension Center, Poplarville, MS
Eugene K. Blythe, Mississippi State University Coastal Research and Extension Center, Poplarville, MS
Christine E. H. Coker, Mississippi State University Coastal Research and Extension Center, Biloxi, MS
Gary R. Bachman, Mississippi State University Coastal Research and Extension Center, Biloxi, MS
James M. DelPrince, Mississippi State University Coastal Research and Extension Center, Biloxi, MS
Audio File Recorded Presentation
Mississippi State University has developed several new crape myrtle selections, including Delta Jazz™. Objective was to determine optimal hormone source and concentration for hardwood cutting propagation of Delta Jazz™. Medial cuttings (12.7 cm) were harvested and stuck to a depth of 2.6 cm on 1 Feb. 2017. Medium was 100% perlite in 7.6 cm containers. Treatments included two basal treatments (wounded or non-wounded), three hormone mixtures (Hortus IBA, Dip & Gro, or Hortus IBA + NAA), and three levels of hormone (0, 1000, or 5000 ppm IBA). Experimental design was a RBCD with five single plant replications. Data collected included percent rooting, new shoot growth, cutting quality, root number, average root length (length of three longest roots/three), and root quality. Rooting percentages were similar, regardless of treatment. Cuttings that were not wounded and dipped in 5000 ppm Hortus IBA or dipped in 5000 ppm Hortus IBA + 2500 ppm KNAA, regardless of wounding, had more roots than the control, cuttings dipped in 1000 ppm Hortus IBA, 1000 ppm Dip’N Grow, or 1000 ppm Hortus IBA + 500 ppm KNAA, regardless of wounding. Cuttings that were wounded and dipped in 1000 ppm Hortus IBA had higher average length of three longest roots compared to plants that received no hormone and not wounded. Root quality ratings were greater for cuttings dipped in 5000 ppm Hortus IBA or 5000 ppm Hortus IBA + 2500 ppm KNAA, regardless of wounding, compared to cuttings that received no hormone, regardless of wounding, or cuttings that were not wounded and dipped in 1000 ppm Dip’N Grow. Cutting quality ratings were higher for cuttings that were wounded and dipped in 5000 ppm Hortus IBA or cuttings that were dipped in 5000 ppm Hortus IBA + 2500 ppm KNAA, regardless of wounding, compared to cuttings that received no hormone or cuttings that were not wounded and dipped in 1000 ppm Dip’N Grow. Growth indices were greater for cuttings that were not wounded and dipped in 1000 ppm Hortus IBA + 500 ppm KNAA compared to cuttings that were not wounded and dipped in 5000 ppm Hortus IBA + 2500 KNAA.
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