Horticultural Sciences Department

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Dr. Jeffrey G. Williamson

Williamson_J.jpg
Office:2113 Fifield Hall
Phone:352-273-4823
E-mail:jgrw@ufl.edu
For more information, visit Dr. Williamson's website. 

Professor

Areas of Research

  • Small fruit horticulture
  • Improving efficiency of small fruit production practices

Educational Background

  • Ph.D., Horticulture, Clemson University (1987)
  • M.S., Horticulture, Auburn University (1983)
  • B.S., Horticulture, Auburn University (1980)

Teaching Responsibilities

  • HOS 6934 - Professional Seminar Preparation
  • FRC 3274 - Tree and Small Fruit Production

Work and International Experiences

  • University of Florida, Professor, 08/98 to present
  • University of Florida, Associate Professor, 08/92 to 08/98 
  • University of Florida, Assistant Professor, 07/87 to 08/92

Honors and Awards

  • Florida State Horticultural Society – Best Paper in Krome Memorial Section, 2009
  • Florida State Horticultural Society – Presidential Gold Medal Award, 2010

Program Personnel

  • Eric Ostmark, Biological Scientist
  • Al Kovaleski, M.S. Student
  • Bruno Casamali, M.S. Student

Selected Publications

  • Buran, T.J., A.K. Saudhu, A.M. Azeredo, A.H. Bent, J.G. Williamson, and L. Gu, 2012. Effect of exogenous abscisic acid on fruit quality, antioxidant capacities, and phytochemical contents of southern highbush blueberries.Food Chemistry. 132:1375-1381.
  • Darnell, R.L., N. Cruz-Huerta, and J.G. Williamson, 2012. Night temperature and source sink effects on overall growth, cell number and cell size in bell pepper ovaries.Annals of Botany 110:987-994.
  • Kao, M.W.S., J.K. Brecht, J.G. Williamson, and D.J. Huber, 2012. Ripening Development and Quality of Melting and Non-melting Flesh Peach Cultivars.Hortscience 47:879-885.
  • Yang, C., W.S. Lee, and J.G. Williamson, 2012. Classification of blueberry fruit and leaves based on spectral signatures.Biosystems Engineering 113:351-362.
  • Cruz-Huerta, N., J. G. Williamson and R. L. Darnell.  2011. Low Night Temperature Increases Ovary Size in Sweet Pepper Cultivars. HortScience. 46:396-401. 
  • Williamson, J.G. and J.H. Crane. 2010. Best management practices for temperate and tropical/subtropical fruit crops in Florida: Current practices and future challenges. HortTechnology. 20: 111-119. 
  • Dourte, D.R., D.Z. Haman and J.G. Williamson. 2010. Crop water requirements of mature southern highbush blueberries. International Journal of Fruit Science. 10(3): 235-248.

Extension (EDIS) publications

Refereed Journal Articles

  • Casamali, B. J.G. Williamson, A.P. Kovaleski, S.A. Sargent and R.L. Darnell. 2016. Mechanical Harvesting and Postharvest Storage of Two Southern Highbush Blueberry Cultivars Grafted onto Vaccinium arboreum Rootstocks. HortScience. 51:1503-1510.
  • Casamali, B., R.L. Darnell, A.P. Kovaleski, J.W. Olmstead, J.G. Williamson. 2016. Vegetative and Reproductive Traits of Two Southern Highbush Blueberry Cultivars Grafted onto Vaccinium arboreum Rootstocks. HortScience. 51:880-886.
  • Kovaleski*, A.P., J.W. Olmstead, J.G. Williamson and R.L. Darnell. 2015. Inflorescence bud initiation and bloom in two southern highbush blueberry cultivars. J. Amer. Soc. Hort. Sci. 140:38-44. 
  • Kovaleski*, A.P., J.G. Williamson, B. Casamali, and R.L. Darnell. 2015. Effects of timing and intensity of summer pruning on vegetative traits of two southern highbush blueberry cultivars. HortScience. 50:68-73. 
  • Kovaleski*, A.P., R.L. Darnell , B. Casamali, and J.G. Williamson. 2015. Effects of timing and intensity of summer pruning on reproductive traits of two southern highbush blueberry cultivars. HortScience. 50:1486-1491.
  • Williamson, J.G., L. Mejia, P. Miller, B. Ferguson, and D.Z. Haman. 2015. Seasonal water use of southern highbush blueberry plants in a sub-tropical climate. HortTechnology. 25:185-191. 
  • Williamson, J.G. and G. Krewer. 2015. Role of plant growth regulators in southern highbush blueberry production under low-chill conditions. J. Amer. Pomological. Soc. 69:11-15.
  • Marino*, S.R., J.G. Williamson, J.W. Olmstead and P.F. Harmon. 2014. Vegetative growth of three southern highbush blueberry cultivars obtained from microprapagation and softwood cuttings in two Florida locations. HortScience 49: 556-561.
  • Darnell, R.L., N. Cruz-Huerta, and J.G. Williamson. 2013. Night temperature and source-sink effects on growth, leaf carbon exchange rate, and carbohydrate accumulation in bell pepper ovaries. J. Amer. Soc. Hort. Sci. 138:331-338.
  • Williamson, J.G. and W.O. Cline. 2013. Mechanized harvest of southern highbush blueberries for the fresh market: An introduction and overview of the workshop proceedings. HortTechnology 23:416-418.
  • Sargent , S.A., A. D. Berry, J. G. Williamson and J. W. Olmstead. 2013. Postharvest quality of mechanically and hand-harvested southern highbush blueberry fruit for fresh market. HortTechnology 23:437-441.
  • **Buran, T.J., A.K. Saudhu, A.M. Azeredo, A.H. Bent, J.G. Williamson, and L. Gu, 2012. Effect of exogenous abscisic acid on fruit quality, antioxidant capacities, and phytochemical contents of southern highbush blueberries. Food Chemistry. 132:1375-1381.
  • Darnell, R.L., N. Cruz-Huerta*, and J.G. Williamson, 2012. Night temperature and sourcesink effects on overall growth, cell number and cell size in bell pepper ovaries. Annals of Botany 110:987-994.
  • *Kao, M.W.S., J.K. Brecht, J.G. Williamson, and D.J. Huber, 2012. Ripening Development and Quality of Melting and Non-melting Flesh Peach Cultivars. Hortscience 47:879-885.
  • **Yang, C., W.S. Lee, and J.G. Williamson, 2012. Classification of blueberry fruit and leaves based on spectral signatures. Biosystems Engineering 113:351-362.
  • *Cruz-Huerta, N., J. G. Williamson and R. L. Darnell.  2011. Low Night Temperature Increases Ovary Size in Sweet Pepper Cultivars. HortScience. 46:396-401. 
  • Williamson, J.G. and J.H. Crane. 2010. Best management practices for temperate and tropical/subtropical fruit crops in Florida: Current practices and future challenges. HortTechnology. 20: 111-119.
  • **Dourte, D.R., D.Z. Haman and J.G. Williamson. 2010. Crop water requirements of mature southern highbush blueberries. International Journal of Fruit Science. 10(3): 235-248.
  • Williamson, J.G. and E.P. Miller. 2009. Effects of fertilizer rate and form on vegetative growth and yield of southern highbush blueberry in pine bark culture. HortTechnology 19:152-157.
  • *Wert, T.W., J.G. Williamson, J.X. Chaparro, E.P. Miller and R.E. Rouse. 2009. The Influence of Climate on Fruit Development and Quality of Four Low-Chill Peach Cultivars. HortScience 44: 666-670. 
  • *Wilber, W. L. and J.G. Williamson. 2008. Effects of fertilizer rate on growth and fruiting of containerized southern highbush blueberry.  HortScience 43: 143-145.
  • Darnell, R. L., Alvarado, H. and J.G. Williamson. 2008. Root Pruning Effects on Growth and Yield of Red Raspberry (Rubus idaeus L.). HortScience 43: 681-684.
  • Williamson, J. G. & Nesmith, D. S. 2007. Evaluation of flower bud removal treatments on growth of young blueberry plants. HortScience.  42:571-573.
  • Williamson, J. G. & Nesmith, D. S. 2007.  Effects of CPPU application on fruit set and development of southern highbush blueberry. HortScience.  42:1612-1615.
  • **Alvarado, H., Darnell, R. L. & Williamson, J. G. 2007. Root to Shoot Relations in an Annual Winter Raspberry (Rubus idaeus L.) Production System. HortScience.  42:1559-1562.
  • *Wert, T. W., Chaparro, J. X., Williamson, J. G. & Rouse, R. E. 2007.  Node type development of four low-chill peach cultivars at three locations in Florida. HortScience.  42:1592-1595.
  • *Wert, T., Williamson, J. G., Chaparro, J. X., Miller, E. P. & Rouse, R. E. 2007.  The Influence of Climate on Fruit Shape of Four Low-Chill Peach Cultivars. HortScience. 42:1589-1591.