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Department of Tropical Plant and Soil Sciences bannerContact Us linkSearch Site linkSite Map linkCTAHR News linkCTAHR Home link

Dr. Kenneth W. Leonhardt
Professor of Horticulture
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Contact Information:

 University of Hawaii at Manoa
Department of Tropical Plant and Soil Sciences
3190 Maile Way, St. John 102
Honolulu, Hawaii 96822-2279

Office: St. John 19A
Telephone: (808) 956-8909
Fax: (808) 956-3894

email: leonhard@hawaii.edu
photo of Dr. Adelheid R. Kuehnle
Educational Background
  • B.S., California Polytechnic University, Pomona, CA, (1971)
  • M.S., Horticulture, University of Hawaii (1973)
  • Ph.D. University of Hawaii (1977)
Courses
  • TPSS 200 - Tropical Plant Science
  • TPSS 492 -  Internship
Current projects
  • Cultivar Development in Proteaceae Floral Crops
    The objectives of this project include the development of new cultivars with improved horticultural characteristics, disease resistance, and an extended blooming season. In 1999 and 2000, 17 new Leucospermum cultivars (3734 cuttings) were introduced to the Hawaii industry via the Protea Growers Association of Hawaii. These new releases were part of a larger distribution of over 13,000 cuttings that included commercial cultivars of Protea and Leucadendron.
Selected Publications
  • Leonhardt, K. W., P. Shingaki, and D. Oka. 2001. New Leucospermum Hybrids from the University of Hawaii. Acta Horticulturae. 545: 55-60. CTAHR J. Ser. No. 4518.
  • Leonhardt, K. W. 2000. Potted, Blooming Dendrobium Orchids. HortTechnology 10(3)
  • Leonhardt, K., P. Shingaki, D. Oka, S. Ferreira, and N. Nagata. 2000. CTAHR Releases Seven New Hybrid Pincushion Protea (Leucospermum) Cultivars. Landscape,  Floriculture, and Ornamentals News No. 7: 2-3. CTAHR UH.
  • Nagata, N. M., and K. W. Leonhardt. 2000. Management of Protea Diseases: Breeding for Resistance; Sanitation, and Sound Cultural Practices.  Proc. Fourth Hawaii Floriculture Industry Conf. CTAHR, UH: 32-35.
  • Womersley, C. Z., L. M. Higa, and K. W. Leonhardt. 2000. Entomopathogenic Nematodes: Where They Live, Why They Kill Insects, and Ways to Improve Their Biocontrol Potential of Insect Pests in a Protected Hawaiian Floriculture Setting. Proc. Fourth Hawaii Floriculture Industry Conf. CTAHR, UH: 27-31.
  • Leonhardt, K. W., and R. A. Criley. 1999. Proteaceae Floral Crops; Cultivar Development and Underexploited Uses. Proc. Fourth National Symposium on New  Crops and New Uses. Perspectives on New Crops and New Uses (and optical version in the New Crops Compendium CD-ROM). Purdue University. CTAHR J. Ser. No. 4431.      
  • Leonhardt, K. W., and K. Sewake (eds). 1999. Growing Dendrobium Orchids in Hawaii, Production and Pest Management Guide. CTAHR, UH. 92 pp.
  • Leonhardt, K. W., L. M. Higa, and C. Z. Womersley. 1998. Biological Control of Insect Pests of Ornamentals Using Entomopathogenic Nematodes. Landscape, Floriculture, and Ornamentals News. No. 3:10-12. CTAHR. UH.                 
  • Leonhardt, K., L. Higa, and C.  Womersley.  1997. Natural Pest Control using the Nematode.  Hawaii Landscape.  1(1): 10.
  • Nagata, N. M., S. J. Ferreira, K. W. Leonhardt, and C. S. Hashimoto. 1997. Fungicide Control of Sphaceloma (Elsinoe) Scab Disease on Pincushion Protea (Leucospermum). Landscape, Floriculture, and Ornamentals News. 1(1):6-7. CTAHR. UH.
  • Nagata, N. M., S. J. Ferreira, K. W. Leonhardt, and C. S. Hashimoto. 1997. Evaluating Leucospermum for Sphaceloma (Elsinoe) Scab Resistance. Landscape, Floriculture, and Ornamentals News. 1(1):7. CTAHR. UH.                
  • Hu, J. S., M. Wang, D. Sether, W. Xie, and K. W. Leonhardt.  1996. Use of Polymerase Chain Reaction (PCR) to study Transmission of Banana Bunchy Top Virus by the Banana Aphid (Pentalonia nigronervosa).  Ann. Appl. Biology.  128: 55-64.
  • Leonhardt, K. W.  1996. Inter-generic Graft Compatibility within the Family Araliaceae.  HortTechnology.  6(3): 254-256.
  • Leonhardt, K. W., V. M. Meade, and D. L. Hensley. 1996. New Bougainvillea for Hawaii Landscapes.  Hawaii Landscape.  10(3): 6-7.
  • Paull, R. E., K. W. Leonhardt, T. Higaki, and J. Imamura.  1995.  Seasonal Flowering of Dendrobium Jaquelyn Thomas in Hawaii.  Scientia Horticulturae.  61: 263-272.
  • Leonhardt, K. W., L. M. Higa, and C. Z. Womersley.  1995.  The Climate in Right for Biological Control of Insect Pests of Floral Crops Using Entomopathogenic Nematodes - Results of Recent Investigations and Current Research.  Proc. Third Multi-Commodity Cutflower Industry Conference.  HITAHR, UH: 68-71.
  • Leonhardt, K. W., S. Ferreira, N. Nagata, D. Oka, J. Kunisaki, P. Ito, and P. Shingaki.  1995.  Hybridizing Leucospermum (Proteaceae) for Disease Resistance and Improved Horticultural Characteristics.  Proc. Third Multi-Commodity Cutflower Industry Conference.  HITAHR, UH: 76-77.
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Last updated on 12/24/02