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

Dr. Hector R. Valenzuela
Vegetable Crops Extension Specialist
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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 117
Telephone: (808) 956-7903
Fax: (808) 956-3894

email: hector@hawaii.edu
Website: http://www2.hawaii.edu/~hector/
Educational Background
  • B.S., Agronomy, Washington State University (1984)
  • M.S., Horticulture/IPM, Washington State University (1987)
  • Ph.D., Vegetable Crops, University of Florida (1990)
Research Interests
  • Culture and management of vegetable crops
  • Agroecology 
  • Organic Farming Techniques 
Current Projects
  • Composting, long-term organic farming trials
  • Habitat management, cover crops, conservation tillage
  • Phosphorus calibration studies
  • Cultivar Evaluation Trials
  • Extension TPSS No. 807: State-wide transfer of vegetable crops production technology. 
Recent Publications
  • Valenzuela, H.R. 2000. Ecologically-based practices for vegetable crops production in the Tropics. HortReviews. 24:139-228. UHM Jour. Series No. 4387.
  • Cho, J.J., R.S. Shimabuku, H. Valenzuela, J. Uchida, and R.F.L. 2001. Mau. The effect of solarization, metam sodium, biological soil treatments and cover crop amendments on pink root incidence and yields of sweet onion in Maui, Hawaii. Florida State Horticultural Society Proceedings, 113:218-221. 
  • Valenzuela, H.R., T. Goo, and T. Radovich. 2001. The effect of bone meal on the yield of jicama, Pachyrhizus erosus, in Oahu, Hawaii. Florida State Horticultural Society Proceedings, 113:222-226.
  • Hamasaki, R., H.R. Valenzuela, and R. Shimabuku (editors and authors). 1999. Field Onion production in Hawaii. Univ. Hawaii at Manoa, CTAHR Coop. Ext. Service Publication. (co-authored the 6 chapters). ISBN: 1-929325-04-5. 
  • Hooks, C.R.R., H.R. Valenzuela, and J. DeFrank. 1998. Incidence of pests and arthropod natural enemies in zucchini grown with living mulches. Agriculture, Ecosystems and Environment. 69:217-231.
  • Valenzuela, H. and J. DeFrank (1995). Agroecology of tropical root crops. CRC Critical Reviews in Pl. Science 14: 213-238.
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Last updated on 12/24/02