Horticultural Sciences

Dr. Peter J. Dittmar

Associate Professor

Mailing Address:
Fifield Hall
2550 Hull Road
PO Box 110690
Gainesville, Florida 32611

Office: 1233 Fifield Hall
Phone: (352) 273-4771
E-mail: pdittmar@ufl.edu

  • Areas of Research
    • Weed science of vegetables, deciduous fruit and nut crops
    • Director of the North Florida IR-4 Field Lab
  • Educational Background
    • Ph.D., Horticultural Sciences, North Carolina State University
    • M.S., Horticultural Sciences, North Carolina State University
    • B.S., Plant and Soil Sciences, Southern Illinois University- Carbondale
  • Extension Programs
    • Collaborating with county and state Extension faculty
    • Providing information to growers on weed management in fruit and vegetable crops
    • Presenting research results and recommendations at field days and commodity meetings
  • Work Experience
    • Associate Professor, Horticultural Sciences Dept., University of Florida, 2018-present
    • Assistant Professor, Horticultural Sciences Dept., University of Florida, 2010-present
    • Research Assistant Scientist, Department of Horticultural Science, North Carolina State University, 2007-2010
    • Graduate Research Assistant, Department of Horticultural Science, North Carolina State University, 2004-2007
  • Honors and Awards
    • 2017- Future Leader Award, Southern IPM Center
    • 2016-Outstanding Weed Scientist, Florida Weed Science Society
    • 2015- John Hutchinson Extension Award for Young Professionals, American Society for Horticultural Science Southern Region
  • Program Personnel
    • Darrell Thomas
    • Michael Long
    • Fernanda Souza Krupek
    • Ranjeet Randhawa

Selected Publications

AuthorsYearTitle / DescriptionPublication
Sharpe, S.M., N.S. Boyd, P.J. Dittmar, G.E. MacDonald, R.L. Darnell 2018 Effect of temperature of clopyralid safety in strawberry. Weed Technology 347-351.
Dittmar, P.J., J.A. Ferrell, J.V. Fernandez, and H. Smith 2016 Effect of glyphosate and dicamba drift timing and rates in bell pepper and yellow squash. Weed Technology 30:217-223.
Sharpe, S.M., N.S. Boyd, and P.J. Dittmar 2016 Clopyralid dose response for two black medic (Medicago luplina) growth stages. Weed Technology 30:717-724.
Reed, T.V., N.S. Boyd, and P.J. Dittmar 2016 Application timing influences purple nutsedge (Cyperus rotundus) and yellow nutsedge (Cyperus esculentus) susceptibility to EPTC and fomesafen. Weed Technology 30:743-750.
Dittmar, P.J., R.B. Batts, K.M. Jennings, R.R. Bellinder, and S.L. Meyers 2015 Reduced metrizbuzin preharvest interval on potato yield and tuber quality. Weed Technology 29:335-339.
Boyd, N. S. and P.J. Dittmar 2015 Impact of application time and clopyralid rate on strawberry growth and yield. Weed Technology 29:821-826.
Miller, M.R. P.J. Dittmar, G.E. Vallad, and J.A. Ferrell 2014 Nutsedge (Cyperus spp.) control in bell pepper (Capsicum annuum L.) using fallow period weed management and fumigation for two years. Weed Technology 28:653-659. 
Miller, M.R., and P.J. Dittmar 2014 Effect of PRE and POST-DIR herbicides for season-long nutsedge (Cyperus spp.) control in bell pepper (Capsicum annuum L.). Weed Technology 28:518-526.
Alves, A., A.W. MacRae, C.J. Hunnicut, T.P.Jacoby, G.E. MacDonald, and P.J. Dittmar 2013 Impact of fallow programs and fumigants on nutsedge (Cyperus spp.) management in plasticulture tomato. Weed Technology 27:323-330.
Dittmar, P.J., D.W. Monks, K.M. Jennings, and J.R. Schultheis 2013 Effects of halosulfuron POST on sweetpotato yield and quality. Weed Technology 27:113-116.