VEGETABLES

Lynn Brandenberger Professor, Vegetables B.S. in Horticulture, 1977, Oklahoma State University, Stillwater, OK Mag in Horticulture, 1983, Texas A&M, College Station, TX Ph.D. in Plant Science, 1992, University of Arkansas, Fayetteville, AR Address:  Horticulture and Landscape Architecture Department, 360 AGH, Stillwater, OK  74078-6027 phone:  405.744.5414 Email: lynn.brandenberger@okstate.edu

PROFESSIONAL EXPERIENCE

2007 to present:  Professor & Horticulture Food Crops Extension & Research Specialist, Oklahoma State University.

2001-2007:  Associate Professor & Horticulture Food Crops Extension & Research Specialist, Oklahoma State University.

2001:  Professor & Extension Horticulturist, Texas Agricultural Extension Service, Texas A&M University System.

1992-2000:  Associate Professor & Extension Horticulturist, Texas Agricultural Extension Service, Texas A&M University System.

1987-1992:  Research Assistant, University of Arkansas, Departments of horticulture and plant pathology, University of Arkansas.

1984-1987:  County Extension Horticulturist, Oklahoma State Cooperative Extension Service, Commanche, Caddo, Canadian and Grady Counties, Oklahoma.

1980-1984:  County Extension Horticulturist, Texas Agricultural Extension Service, Smith County, Texas.

Lynn Brandenberger is a horticulturist with major responsibilities for serving the needs of the commercial vegetable industry in Oklahoma. He is responsible for leading extension and research programs focused on enhancing the yield, quality and safety of fresh and processed vegetables. His program addresses the cultural aspects of vegetable production, leading efforts state wide for crop cultural concerns, weed control and food safety. His research and demonstration program has been instrumental in cooperating with producers and county extension educators to determine industry needs and how to address those needs. Past and ongoing work includes: Variety evaluations, fertility, irrigation, mulches, crop enhancement compounds and population studies; Herbicide screening and rate studies in several vegetable crop groups; Studies regarding the potential for microbial contamination in fresh produce; Soil improvement through cover crop use. In addition, he has published results of his work through peer reviewed journals and written numerous applied research reports. His work has been implemented through collaborations with researchers, producers and county extension staff throughout the state and nation.
Current and past projects include evaluation of vegetable cultivars and screening of new weed control materials for use in vegetable crops. Detailed results of these studies are included in the 2003 Vegetable Trial Report and are available through the Department of Horticulture at Oklahoma State University. Extensive and complete data information can be found on the following web site: http://www.hortla.okstate.edu/hortla/vegtrial.htm

SUMMARY OF INTERNATIONAL PROFESSIONAL ACTIVITIES

Short Courses taught

• Food processing short course at Mongolia International University taught during three weeks of spring semester 2009.  He was a member of the team that developed and taught this new course for MIU.  His role was the development and delivery of part of the food safety section of the course including overall course introduction, good agriculture practices, good management practices, and several aspects of HACCP.  This three credit course included 45 hours of instruction by the four member team.

Consulting

• March 2009:  Consulted with Mexican agricultural producers in the state of Zacatecas.  Primary activities included soil testing, consultation on soil fertility and introducing producers to basic concepts of soil fertility management.  Consultations also included advice on vegetable and fruit crops.
• May-June 2009:  Consulted with university, government officials, and development agencies regarding the development of agriculture within Mongolia.  Mongolia agriculture currently consists primarily of migratory herding including cattle, sheep, and goat production.  Arable farm land is available within the country for crop production and is being investigated by development agencies for leasing for crop production and for the development of production by native Mongolian agriculture.

REFEREED JOURNAL PUBLICATIONS

Webber, C.L. lll, Brandenberger, L.P., Shrefler, J.W., Taylor, M.L.,  J.W., Wells, L.K., and Shannon, D.K. 2008. Weed Control with the Precision Application of Ammonium Nonanoate. Precision Agriculture Journal.  In-press, 2009.

Brandenberger, L., Cavins, T., Payton, M., Wells, L., Johnson, T.  2007.  Yield and Quality of Spinach Cultivars for Greenhouse Production in Oklahoma.  HortTechnology 17(2): 269-272.

Shrefler, J.W., Brandenberger, L.P., Webber, C.L., Roberts, W., Payton, M.E., and Wells, L.K.  2007.  Postemergence weed control using halosulfuron in direct-seeded watermelon.  Weed Technology 21 (4): 851-856.

Burgos, N.R., Brandenberger, L.P., Stiers, E.N., Shivrain, V.K. Motes, D.R., Eaton, S., Martin, L.W., Morelock, T.E.  2007.  Tolerance of selected advanced cowpea (Vigna unguiculata L.) breeding lines to fomesafen.  Weed Technology 21(4): 863-868.

Brandenberger, L.P., Shrefler, J.W., Webber, C.L. III, Talbert, R.E., Payton, M.E., Wells, L.K., Mcclelland, M.  2007.  Injury potential from carryover of watermelon herbicide residues. Weed Technology 21 (2): 473-476.

Brandenberger, L., McGlynn, W., Wells, L., Bostian, B., and Payton, M.  2007.  Production and Quality Evaluations of Processing Carrots.  HortTech 17 (1):133-135.

Brandenberger, L.P., Shrefler, J.W., Webber C.L., Talbert, R.E., Payton, M.E., Wells, L.K., McClelland, M. 2005. Preemergence Weed Control in Direct-Seeded Watermelon (Citrullus lanatus). Weed Technology 19 (3):706-712.

Brandenberger, L.P., Talbert, R.E., Wiedenfeld, R.P., Shrefler, J.W., Webber, C., and Malik, S.  2005.  Effects of Halosulfuron on Weed Control in Commercial Honeydew Crops.  Weed Technology 19 (2):346-350.

Brandenberger, L.P.,Wells, L.K., and Haigh, M.M.  2004.  Yield and quality characteristics of spring spinach grown in Oklahoma.  HortTechnology 14:602-605.

Norsworthy, J. K., L. Brandenberger, N. Burgos, and M. Riley.  2004.. Weed suppression in Vigna unguiculata with a spring-seeded brassicaceae green manure. Crop Protection 24 (5):441-447.

Smart, J.R., Brandenberger, L., and Makus, D.  2001.  Cabbage (Brassica oleracea L.) response to sulfentrazone for broadleaf weed control.  Journal of Vegetable Crop Production 7 (2): 97-108.

Wiedenfeld, R.P., and Brandenberger, L.P.  2000.  Evaluation of a natural fertilizer for vegetable production in the Lower Rio Grande Valley of Texas.  Subtropical Plant Science Journal 52: 12-17.

Brian A. Kahn

• Professor, Vegetables
• B.S. in Horticulture, 1976, Delaware Valley College of Science and Agriculture, Doylestown, PA

M.S. in Vegetable Crops, 1979, Cornell University, Ithaca, NY
Ph.D. in Vegetable Crops, 1982, Cornell University, Ithaca, NY
• Address: Horticulture and Landscape Architecture Department, 360 AG Hall, Stillwater, OK 74078- 6027
• phone: 405-744-5414
• email: brian.kahn@okstate.edu

Teaching Activities: Dr. Kahn is the Department Undergraduate Advising Coordinator and the Undergraduate Horticulture Teaching Coordinator. He also coordinates HORT 2010, Internship in Horticulture.  Dr. Kahn teaches HORT 1013, Principles of Horticultural Science, each spring and fall semester, and teaches HORT 3433, Commercial Vegetable Production, in the fall of odd-numbered years.

Research Activities:  Brian Kahn conducts research focusing on sustainable cultural and management practices for improved yield and quality of vegetables in Oklahoma.  While he is primarily an applied scientist, he also conducts some more basic research, especially studies involving vegetable root systems.  The long term goal is to provide knowledge which will support the expansion of a sustainable commercial vegetable industry in Oklahoma.  Current areas of emphasis include:
Sustainable Pest Management Strategies.  Dr. Kahn is part of a multi-disciplinary team seeking funding to investigate strategies for increasing the abundance of beneficial arthropods in mixed plantings (polycultures).  Polycultures that include different vegetable crops will be studied if suitable grant funding is obtained.
Diversification of Oklahoma Vegetable Production.  Applied research and cultivar trials are conducted as necessary to provide cultural suggestions to growers. The goal is to expand high-quality production of vegetables that traditionally have been minor crops in Oklahoma, with emphasis on the cole crops and peppers.  Cultural practices are being developed to facilitate mechanical harvest of cilantro and direct-seeded basil.  Detailed information is being developed on eggplant cultivar adaptation, including modeling of yield development in cooperation with the Department of Statistics.  

Selected Recent Publications
Kahn, B.A. and W.G. McGlynn.  2009.  Relating objective and subjective ratings of snap bean pod color to likelihood of purchase.  HortScience 44:737-741.
Kahn, B.A. and J.P. Damicone.  2008.  Kaolin particle film product applications before harvest begins may not improve marketable yields of fresh tomatoes.  HortTechnology 18:144-147.
Kahn, B.A. and D.I. Leskovar.  2006.  Cultivar and plant arrangement effects on yield and fruit quality of bell pepper.  HortScience 41:1565-1570.
Kahn, B.A., J.K. Hyde, J.C. Cole, P.J. Stoffella, and D.A. Graetz.  2005.  Replacement of a peat-lite medium with compost for cauliflower transplant production.  Compost Sci. & Utiliz. 13:175-179.
Kahn, B.A., J.P. Damicone, and R.J. Schatzer.  2005.  Alternatives to benomyl for management of Cercospora leaf spot on turnip greens.  HortScience 40:1324-1326.
Stoffella, P.J. and B.A. Kahn (eds.).  2001.  Compost utilization in horticultural cropping systems.  Lewis Publishers, Boca Raton, Fla.  414 pages.

B. Warren Roberts Associate Professor Address: WWAREC, Box 128, Lane, OK 74555 phone: 405-889-7343 email: wroberts@lane-ag.org

Research Activities:  Warren is located at the Wes Watkins Agricultural Research and Extension Center in southeastern, Oklahoma.  This center was designed to develop and promote horticultural cropping systems.  His research projects are based on soil fertility and cultural management of vegetables.  Most projects are applied and interdisciplinary, and include the efforts of an OSU weed scientist and an OSU agricultural economist who are also located at this center. Current research emphasis is placed on organic production of vegetables, and also upon development of systems that encourage locally grown and locally marketed vegetables. Current projects include cultivar selection of vegetables that can be consumed with minimal processing, and upon season extension techniques that will allow vegetables to be produced earlier in the spring and later in the fall.  Other projects are underway to determine the value and limitations of poultry litter as a soil fertilizer in vegetable production.

Extension Activities: Field days, farm demonstrations, and county extension educator and grower training sessions are used to disseminate information obtained from research projects, most of which are interdisciplinary.  Projects include soil fertility and cultural management of vegetables.  Current focus is on organic production and on locally grown and distributed vegetable systems.
 

Selected Publication:
Perkins-Veazie, Julie K. Collins, Angela R. Davis, and Warren Roberts.  2006.  Carotenoid content of 50 watermelon cultivars.  J. Agric. Food Chem.  2006, 54, 2593-2597.

Lu, Wenhua, B. Warren Roberts, Merritt J. Taylor, Jonathan V. Edelson, Carla Goad, William D. Warde, Seong S. Chae.  Production systems and association of management factors affecting productivity of Watermelon.  Journal Vegetable Science.  In Press.

Edelson, J.V. and W. Roberts.  2005.  Watermelon Growth And Yield Reductions Caused By Squash Bug (Hemiptera: Coreidae) Feeding.  Southwestern Entomol. 30(1): 17 – 22.

 Dogramaci, M., J. W. Shrefler, B. W. Roberts, S. Pair and J. V. Edelson.  2004.    Management strategies for squash bug (Hemiptera: Coreidae) in watermelon.  J. Econ. Entom. 97:  1999 – 2005.

Perkins-Veazie, P., and W. Roberts.  2004.  Can potassium application affect the mineral and antioxidant content of horticultural crops? Proc. Of Symposium on Fertilizing Crops for Functional Food.  Potash & Phosphate Institute, Soil Science Society of American, Crop Science Society of America, American Society of Agronomy. Chap. 2(1-5).

Dogramaci, M., Wenhua. Lu, B. Warren Roberts, Jim W. Shrefler, Mark Payton, Merritt J. Taylor, James A. Duthie, and J. V. Edelson.  2004. Occurrence and abundance of watermelon (Citrullus lanatus) arthropod pests in Oklahoma.  SW Entomologist.  29(2):99-110.

Lu, Wenhua, J.V. Edelson, Jim A. Duthie, and B. Warren Roberts.  2003.  A comparison of yield  between high- and low-intensity management for three watermelon cultivars.  HortScience 38(3):351-356.

Edelson, J.V., J. Duthie , and W. Roberts .  2003.  Watermelon growth, fruit yield and plant survival as affected by squash bug (Hemiptera: Coreidae) feeding.  J. Econ. Entomol.  96(1):64-70.

Lu, Wenhua, B. Warren Roberts, James A. Duthie, James W. Shrefler, Merritt J. Taylor, and Jonathan V. Edelson.  2003.  Characteristics and geographic variation of watermelon (Citrullus lanatus) production in Oklahoma from a statewide survey.  J. Veg. Crop. Prod.  9(1):33-48.

Lu, Wenhua, James A. Duthie, B. Warren Roberts, Merritt J. Taylor, Jonathan V. Edelson.  2003.  Partial budget analysis of effects of crop management intensity on profitability of three watermelon cultivars.  J. Veg. Crop. Prod.  9(1):49-71

Williams, T.V. and W. Roberts.  2002.  Is vegetable variety evaluation and reporting becoming a lost art?  HortTechnology.  12(4): pp 553-559.

Edelson, J.V., J. Duthie and W. Roberts.  2002.  Watermelon seedling growth and mortality as affected by Anasa tristis (Heteroptera: Coreidae).  J. Econ. Entomol.  95(3):595-597.

Perkins-Veazie, P., J. K. Collins, S. D. Pair, and W. Roberts.  2001.  Lycopene content differs among red-fleshed watermelon cultivars.  J. Sci. Food and Agric.
81(10): 983-987.

Edelson, J.V., J. Duthie and W. Roberts.  2002.  Toxicology of biorational insecticides:  Activity against the green peach aphid (Myzus persicae (Sulzer)).  Pest
Management Science. 58:255-260.

Roberts, W., J. Duthie, J. Edelson, B. Cartwright, J, Shrefler, N. Roe.  1999.  Limitations and Possibilities for Some Conservation Tillage Systems with Vegetable
Crops in the Southern Plains of the United States.  HortTechnology 9(3): 359-365.

Duthie, J.A., Shrefler, J.W., Roberts, B.W., and Edelson, J.V. 1999. Plant density-dependent variation in marketable yield, fruit biomass, and marketable fraction in watermelon. Crop Science 39:406-412.

Duthie, J.A., Roberts, B.W., Edelson, J.V., and Shrefler, J.W. 1999. Plant density-dependent variation in density, frequency, and size of watermelon fruits. Crop
Science 39:412-417.
 
 

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