Office: 205 Gourley Hall

Phone: (330) 263-3593

Fax: (330) 263-3685

E-mail: Doohan.1@osu.edu

Associate professor

Department of Horticulture and Crop Science

The Ohio State University, Wooster, Ohio

Area of Responsibility/Interests:

Weed management in horticultural (fruit & vegetable)

crops; agricultural risk analysis; fruit and vegetable

food safety education.

Education History:

PhD – North Carolina State University

MS – North Carolina State University

BS (Hon) – University of Guelph

1. Impact assessment of fruit and vegetable food safety educational programs. Educational programs will be based upon underway mental models research and tailored for appropriateness to segregated audience groups such as large conventional farmers, Amish and African American farmers. Funded ($2.5 million ) by USDA CREES National Integrated Food Safety Program. Jointly held with Kentucky State University and Purdue University.

2. Development of herbicide treated mulchs for weed control and winter protection in Vinifera vineyards. Funded ($29 K) by the Ohio Grape Improvement Committee.

3. Perception and knowledge of Ohio row-crop farmers regarding weed management. Farmers ‘mental models’ about weeds and their management influence decisions regarding implementation of integrated approaches, preference for herbicides, and confidence that herbicide companies will introduce new products to manage resistant biotypes. Funded ($100 K) through an OARDC Research Enhancement Competitive Grants Program Interdisciplinary Team Grant.

4. Transition strategies that control weeds and build soil health. Field surveys conducted in 2001/ 2002 indicated that perennials are the major problem weeds faced by organic vegetable farmers. This project is focused upon developing well-validated methods to control these species while enhancing soil quality. A significant component of the project is directed to outreach to organic farmers community through an innovative ‘learning community’ approach. Funded ($545 K) by USDA CREES Integrated Organic Program.

5. New herbicides for bramble production. Field and greenhouse experiments are underway to identify herbicides and use-patterns that will more effectively control perennial broadleaf weeds in brambles. Funded ($25 K) by Ohio Berry Coop and OSUE South Centers Piketon.

1. Engaging Fruit and Vegetable Growers in Enhanced Food Safety Practices through Audience Tailored Risk Communication. Safety of the food supply is a major and growing concern of Americans. Farmers need access to the best information on safe production and marketing practices. Agriculture & Natural Resource Educators (ANRE) are the most trusted individuals in the state to deliver this program but require training and a resource team. This project, supported through a $60 K grant from the OSU Excellence in Engagement program, has developed a team of 5 county-based ANRE to deliver fruit and vegetable food safety education to producers throughout the state. The goal is to directly reach and impact the food safety practices of 75% of the approximately 1200+ individuals involved in producing marketable produce.

2. OSU Agricultural Risk Analysis Program (http://riskanalysis.osu.edu/projects.html). Variable response by farmers to agricultural and food system risks may have dire consequences for society. The technology adoption model used by extension educators contributes to the variable adoption of preventive behaviors. Risk analysis as an alternate means to assess and communicate about agricultural and the food system risks. Risk analysis is a comprehensive, scientific approach to risk that involves scientists and the public. Risk analysis integrates social and natural sciences with audience considerations to overcome limitations inherent in traditional technology adoption approaches. This program is innovative in its integration of natural and social sciences and its adaptation of risk-analysis to the special circumstances of agricultural and food problems.

3. OSU Fruit Team. Ohio has a multi-million dollar fruit production and fresh fruit marketing industry that relies upon OSU faculty and staff for research and Extension programs to support production and marketing issues. My role on the OSU Fruit Team is as State Specialist responsible for weed management. I conduct relevant research and prepare recommendations for weed control that are published in OSUE bulletins and newsletter articles. I also participate in grower short courses and workshops and provide lecture and hands-on training regarding the most critical aspects and developments for these important crops.

4. OSU Vegetable Crops Team. I provide weed management expertise and support to the network of Specialists and Educators working with Vegetable Producers including.
Support is provided through regular contributions to the VEG NET newsletter, education and research programs conducted by the Ohio Produce Growers & Marketers Association, field days, and on-farm demonstrations.

5. Apple of Peru: An Invasive Weed of the Agro-Ecosystem. The objective of this program was to create awareness of the apple of Peru invasion of Ohio agroecosystems. Apple of Peru (Nicandra physalodes) has been detected on 21 farms near Fremont Ohio. This weed is a major threat to agroecosystems in Ohio and throughout the US. Apple of Peru is a serious weed problem in Brazil, Australia, Japan and East Africa.

Fennimore, S. and D. Doohan. 2008. The challenges of minor crop weed control – future directions. Weed Technology. 22:364-372.

Wilson, R., J. LeJeune, M. Tucker, N. Hooker and D. Doohan. 2008. Perceptions and beliefs about weed management: Perspectives of Ohio grain and produce farmers. Weed Technology. 22:339-350.

Jiang, L., T. Koch, I. Dami, and D. Doohan. 2008. Recalcitrant weeds in Ohio vineyards. Weed Technology. 22: 91-96.

Felix, J., D. Doohan, and D. Bruns. 2007. Differential vegetable crop responses to mesotrione soil residues a year after application. Crop Protection. 26(9) 1395-1403.

Figueroa, R., D. Doohan, J. Cardina and K. Harrision. 2007. Common groundsel (Senecio vulgaris) seed longevity and seedling emergence. Weed Science. 55:187-192

Wszelaki, A.L., D. Doohan, and A. Alexandrou. 2007. Weed control and crop quality in cabbage (Brassica oleracea (Capitata group)) and tomatoes (Lycopersicon lycopersicon) using a propane flamer. Crop Protection. 26: 134-144.

Nahar, M. S., P. Grewal, S.A. Miller, D. H. Stinner, B. R. Stinner, M. D. Kleinhenz, A. L. Wszelaki, and D. Doohan. 2006. Differential effects of raw and composted manure on nematode community, and its indicative value for soil microbial, physical and chemical properties. Applied Soil Ecology. 34:140-151.

Figueroa, R.A and D.J. Doohan. 2006. Selectivity and efficacy of clopyralid on strawberry (Fragaria X ananassa). Weed Technology. 20:101-103

Felix, J. and D. Doohan. 2005. Response of five vegetable crops to isoxaflutole soil residues. Weed Technology. 19: 391-396

Polter, S.B., D. Doohan, and J.C. Scheerens. 2005. The effect of irrigation on terbacil tolerance in field-grown strawberry. HortTechnology. 15:560-564.

Figueroa, R., D. Doohan, and J. Cardina. 2005. Efficacy and selectivity of promising herbicides for common groundsel control in newly established strawberry. HortTechnology. 15: 261-266.

Felix, J., D. J. Doohan, S. C. Ditmarsen, M. E. Schultz, T. R. Wright, M. E. Schultz, T.R. Wright, B. R. Flood, T. L. Rabaey. 2005. Effect of flumetsulam plus clopyralid soil residues on potatoes (Solanum tuberosum L.), lima beans (Phaseolus limensis L.) and snap beans (Phaseolus vulgaris L.) grown in rotation. Crop Protection. 24: 790-797.

Shuster, W., C. P. Herms, M. Frey, D.J. Doohan, and J. Cardina. 2005. Comparison of survey methods for an invasive plant at the subwatershed level. Biological Invasions 7: 393-403.

Polter, S., D. Doohan, and J.C. Scheerens. 2004. Tolerance of greenhouse-grown strawberry to terbacil as influenced by cultivar, plant growth stage, application rate, application site and simulated post-application irrigation. HortTechnology. 14:223-229.

Clements, S., A. DiTommaso, S. Murphy, C. Mohler, J. Cardina, D. Doohan, N. Jordan, B. Booth and C. Swanton. 2004. Adaptability of plants invading North American cropland. Agriculture, Ecosystems and Environment. 107:379-398.

Jensen, K., D. Doohan, and E. Specght. 2004. Response of processing carrot to metribuzin on mineral soils in Nova Scotia. Canadian Journal of Plant Science. 84:669-67.