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John Teasdale
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Educational Background

B.A. History, AmherstCollege, Amherst, MA, 1966.

B.S. Biology, University of Washington, Seattle, 1973.

M.S. Plant Pathology, WashingtonStateUniversity, Pullman, 1975.

Ph.D. Agronomy, University of Wisconsin, Madison, 1978.


Research Objectives

Serves as Lead Scientist of the Sustainable Agricultural Systems Lab Weed Ecology Project and contributes to the Farming Systems Project. Conducts basic and applied research to develop sustainable cropping systems with an emphasis on integrated weed management systems and the provision of multiple ecological services through cover crop management. Current research focuses on development of reduced tillage management systems for organic and sustainable agriculture as well as basic understanding of the interactions between cover crop residue, the soil environment, and weed-crop competitive relationships.


Selected Recent Papers


Weed Suppression by Cover Crops


Teasdale, J.R., and C.L. Mohler. 2000. The quantitative relationship between weed emergence and the physical properties of mulches. Weed Science 48:385-392.


Teasdale, J.R. and R.C. Rosecrance. 2003. Mechanical versus herbicidal strategies for killing a hairy vetch cover crop and controlling weeds in minimum-tillage corn production.  American Journal of Alternative Agriculture 18:95-102.


Teasdale, J.R., D.R. Shelton, A.M. Sadeghi, and A.R. Isensee. 2003. Influence of hairy vetch residue on atrazine and metolachlor soil solution concentrations and weed emergence. Weed Science 51:628-634.


Teasdale, J.R., Pillai, P., Collins, R.T. 2005. Synergism between cover crop residue and herbicide activity on emergence and early growth of weeds. Weed Science 53:521-527.


Teasdale, J.R., and P. Pillai. 2005. Contribution of ammonium to stimulation of smooth pigweed germination by extracts of hairy vetch residue. Weed Biology & Management 5:19-25.


Rice, C.P., Y.B.Park, F. Adam, A.A. Abdul-Baki, and J.R. Teasdale. 2005. Hydroxamic acid content and toxicity of rye at selected growth stages. Journal of Chemical Ecology 31:1887-1905.


Teasdale, J.R., L.O. Brands?ter, A. Calegari, and F. Skora Neto. 2007. Cover Crops and Weed Management. Pages 49-64 In: M K Upadhyaya and R E Blackshaw (eds.) Non Chemical Weed Management Principles, Concepts and Technology. CABI, Wallingford, UK.


Hairy Vetch Cover Cropping Systems


Rice, P.J., L.L. McConnell, L.P. Heighton, A.M. Sadeghi, A.R. Isensee, J.R. Teasdale, A.A. Abdul-Baki, J.A. Harman-Fetcho, and C.J. Hapeman. 2001. Runoff loss of pesticides and soil: A comparison between vegetative mulch and plastic mulch in vegetable production systems. Journal of Environmental Quality 30:1808-1821.


Mills, D.J., Coffman, C.B., Teasdale, J.R., Everts, K.B., and Anderson, J.D. 2002 Factors associated with foliar disease of staked fresh market tomatoes grown under differing bed strategies. Plant Disease 86:356-361.


Teasdale J.R., T.E. Devine, J.A. Mosjidis, R.R. Bellinder, and C.E. Beste. 2004. Growth and development of hairy vetch cultivars in the Northeastern United States as influenced by planting and harvesting date. Agronomy Journal 96:1266-1271.


Abdul-Baki, A.A., and J.R. Teasdale. 2007. Sustainable Production of Fresh-Market Tomatoes and Other Vegetables with Cover Crop Mulches. USDA-ARS Farmers' Bulletin No. 2280. 31 pp.



Teasdale, J.R., A.A. Abdul-Baki, and Y.B. Park. 2008. Sweet corn production and efficiency of nitrogen use in high cover crop residue. Agronomy for Sustainable Development 28:559-565.


Mattoo, A.K., and J.R. Teasdale. 2010. Ecological and genetic systems underlying sustainable horticulture. Horticultural Reviews 37:331-362.


Buyer, J.S., J.R. Teasdale, D.P. Roberts, I.A. Zasada, and J.E. Maul. 2010. Factors affecting soil microbial community structure in tomato cropping systems. Soil Biology & Biochemistry 42:831-841.


Long Term Cropping System Research


Teasdale, J.R., R.W. Mangum, J. Radhakrishnan, and M.A. Cavigelli. 2004. Weed seedbank dynamics in three organic farming crop rotations. Agron. J. 96:1429-1435.


Teasdale, J.R., C.B. Coffman, and R.W. Mangum. 2007. Potential long-term benefits of no-tillage and organic cropping systems for grain production and soil improvement. Agron. J. 99:1297-1305.


Teasdale, J.R. 2007. Strategies for soil conservation in no-tillage and organic farming systems. Journal of Soil and Water Conservation 62:144-147.


Cavigelli, M.A., J.R. Teasdale, and A.E. Conklin. 2008. Long-term agronomic performance of organic and conventional field crops in the mid-Atlantic region. Agronomy Journal 100:785-794.


Cavigelli, M.A., B.L. Hima, J.C. Hanson, J.R. Teasdale, A.E. Conklin, and Y.C. Lu. 2009. Long-term economic performance of organic and conventional field crops in the mid-Atlantic region. Renewable Agriculture & Food Systems 24:102-119.


Ryan, M.R., R.G. Smith, D.A. Mortensen, J.R. Teasdale, W.S. Curran, R. Seidel, and D.L. Shumway.  2009.  Weed-crop competition relationships differ between organic and conventional cropping systems. Weed Research 49:572-580.


Ryan, M.R., D.A. Mortensen, L. Bastiaans, J.R. Teasdale, S.B. Mirsky, W.S. Curran, R. Seidel, D.O. Wilson, and P.R. Hepperly. 2010. Elucidating the apparent maize tolerance to weed competition in long-term organically managed systems. Weed Research 50:25-36.


Teasdale, J.R., and M.A. Cavigelli. 2010. Subplots facilitate assessment of corn yield losses from weed competition in a long-term systems experiment. Agronomy for Sustainable Development 30:445-453.