Horticultural Sciences Department

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Extension Faculty




Fruit Production

 
photo of Dr. Crane
 
Jonathan Crane - Jonathan is an extension specialist for tropical fruit crop production and is located at the UF-IFAS Tropical Research and Education Center in Homestead, FL. His research interests include tree size control strategies, nutrient and irrigation management, cultivar evaluation and development, and cultural practices to avoid and/or mitigate environmental stresses. Jonathan, along with Jeff Williamson, hosts FruitScapes, a website on growing fruit trees in the home landscape. 
photo of Dr. Olmstead

Mercy Olmstead - Mercy is an extension specialist for stone fruit production and is located in the Horticultural Sciences Department in Gainesville.  Her research program focuses on optimizing stone fruit production practices, including crop load management and nutrition management.  Mercy authors and maintains the Stone Fruit Web Site.

photo of Dr. Jeff Williamson
 
Jeff Williamson - Jeff provides leadership for deciduous fruitproduction with emphasis on blueberry culture and management and is located in the Horticultural Sciences Department in Gainesville. His program focuses on soil management, irrigation and fertilization practices, cultivar evaluation, and use of plant growth regulators. He serves as newsletter editor and educational program director for the Florida Blueberry Grower's Association. He also provides leadership for Florida 4-H in the area of fruit culture.



Postharvest Technology

 

Jeff Brecht

Jeff Brecht - Jeff conducts statewide and international extension programming involving the harvest, handling and storage of fresh vegetables and fruits for maintenance of product quality and is located in the Horticultural Sciences Department in Gainesville. As Director of the UF-IFAS Center for Food Distribution & Retailing, Jeff interacts with commodity associations, packers, shippers, distributors, importers, exporters, processors and retailers to extend information regarding advances in perishables handling.

photo of Dr. RitenourMark Ritenour - Mark has statewide responsibility for postharvest handling and storage of fresh citrus and is located at the UF-IFAS Indian River Research and Education Center in Fort Pierce, FL. His program focuses on improving fruit quality through improved preharvest management and postharvest handling practices, and providing instruction in good sanitation and food safety practices. Mark maintains the UF-IFAS Postharvest Resources web site and monitors changes in citrus pesticide maximum allowable residue limits for domestic and selected export markets. 
photo of Dr. Sargent
 
Steve Sargent - Steve is an extension specialist with statewide responsibility for postharvest handling and storage of fresh vegetables, fruits (non-citrus), and herbs, and is located in the Horticultural Sciences Department in Gainesville. His program focuses on methods for improving postharvest handling efficiency, and cooling and quality of these crops. Steve coordinates the annual Florida Postharvest Horticulture Industry Tour and the Tomato Packinghouse Managers Workshop.


Vegetable Production

 
photo of Dr. Ozores-Hampton
 
Monica Ozores-Hampton - Monica has statewide responsibility for vegetable production and is located at the Southwest Florida Research and Education Center in Immokalee, FL. Her program focuses on nutrient use efficiency and fertilization practices to facilitate the adoption of nutrient best management practices by the vegetable industry. Monica also does vegetable variety testing for diseases such as Tomato Yellow Leaf Curl Virus. She annually teaches a workshop in compost utilization in horticultural crops at the US Composting Council as well in Spanish speaking countries
photo of Dr. Treadwell
 
Danielle Treadwell - Danielle is an extension vegetable specialist for organic and sustainable vegetable productionand is located in the Horticultural Sciences Department in Gainesville. Her program focuses on greenhouse vegetable and herb production, cover crop management in vegetable systems, and organic nutrient management. Danielle provides leadership for the UF-IFAS and Florida Agricultural and Mechanical University's Small Farms and Alternative Enterprises Extension Team, the Florida Small Farms Conference and the UF-IFAS and FAMU Small Farms and Alternative Enterprises website . 
photo of Dr. Zotarelli
 
Lincoln Zotarelli - Lincoln is an extension specialist for vegetable productionwith emphasis on production, irrigation and nutrient management of potato, crucifers, and other vegetables and is located in the Horticultural Sciences Department in Gainesville. His program focuses on improvement of irrigation and fertilization techniques to increase irrigation water savings and nutrient efficiency. He also participates in the eastern U.S. Potato breeding and variety development program by testing, evaluating and selecting new potato varieties with outstanding performance for Florida conditions.
photo of Dr. liu
 
Guodong "David" Liu - Guodong (David) Liu, is a state extension specialist of plant nutrition, is based in the Horticultural Sciences Department in Gainesville. His extension program focuses on the economic and ecological management of nutrients and water (nutrient eco-management for short) including best management practices (BPMs) of vegetable and fruit crops. Serving county faculty and crop producers is his top priority. His extension program focuses on improving nutrient and water use efficiency of vegetable and fruit crops including water and nutrient management, fertilization practices and new fertilizer development. He participates in planning and conducting statewide and regional seminars, workshops, conferences, and field demonstrations for county extension agents and vegetable and fruit producers.


Weed Science

 
photo of Dr. Stall

Peter Dittmar - Peter is an extension specialist for weed management programs in deciduous fruit, vegetable, and nut cropsand is located in the Horticultural Sciences Department in Gainesville.  His program focuses on weed/crop relationships, weed ecology, and weed management strategies.  He participates in The IR4 Project for registration of pesticides in minor use crops.