Division of Agriculture and Natural Resources
Division of Agriculture and Natural Resources
Division of Agriculture and Natural Resources
University of California
Division of Agriculture and Natural Resources

James J Stapleton PhD

Photo of James J Stapleton PhD
IPM Plant Pathologist
Kearney Agricultural Center Academic Unit
9240 S. Riverbend Ave.
Parlier, CA 93648
(559) 646-6536
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Kearney Agricultural Research & Extension Center



Ph.D., University of California, Davis

Research Statement
Plant/pathogen/pest relationships are complex and involve interactions among biological, chemical, and physical processes. The research and extension focus of our laboratory is on understanding and manipulating elements of these processes to produce and support appropriate pest management strategies. Our work emphasizes development and implementation of alternatives to application of pesticides, primarily using quantitative and qualitative manipulation of passive solar energy and knowledge-based utilization of organic materials and byproducts.  A current focus of our laboratory deals with using integrated means of reducing reservoirs of weedy plant propagative materials in selected ecosystems.  Applications of appropriate technology and sustainability issues are emphasized. 

Recent Products (partial)

2016 Achmon, Y., Harrold, D.R., Claypool, J.T., Stapleton, J.J., VanderGheynst, J.S., and Simmons, C.W.   Assessment of major California fruit processing residues as soil amendments for biosolarization. Waste Management 48:156-164. 

2015 Stapleton, J.J., and Orloff, S.B. Dyer’s woad – an invasive weed pest threatening the intermountain region of California. CAPCA Adviser Magazine, February 2015, pages 36-38.

2014  Simmons, C.W., Claypool, J.T., Marshall, M.N., Jabusch, L.K., Reddy, A.P., Simmons, B.A., Singer, S.W., Stapleton, J.J., and VanderGheynst, J.S.  Characterization of bacterial communities in solarized soil amended with lignocellulosic organic matter.  Applied Soil Ecology 73:97-104.

2013  Marshall, M.N., Rumsey, T.R., Stapleton, J.J., and VanderGheynst, J.S.  A predictive model for soil temperature during solarization and model validation at two California field sites.  Transactions of the American Society of Agricultural and Biological Engineers 56:117-133.

2013  Simmons, C.W., Guo, H., Claypool, J.T., Marshall, M.N., Perano, K.M., Stapleton, J.J., and VanderGheynst, J.S.  Managing compost stability and amendment into soil to enhance soil heating during soil solarization.  Waste Management 33:1090-1096.

2012  Stapleton, J.J.  Vigilance, sanitation, and spot treatment can help prevent spread of invasive weeds.  CAPCA Adviser Magazine, June 2012, pp. 20-22.

2012  Gamliel, A., and Stapleton, J.J.  Combining organic amendments and solarization for soil disinfestation.  Pages 109-120 in: Soil Solarization: Theory and Practice.  A. Gamliel and J. Katan, Eds.  APS Press, St. Paul, MN.

2012  Stapleton, J.J.  Feasibility of solar tents for inactivating weedy plant propagative material.  Journal of Pest Science 85:17-21.

2012  Mitchell, J.P., Summers, C.G., Newton, A.S., and Stapleton, J.J.  Economic analysis of three soil-surface practices for production of fresh-market tomato (Solanum lycopersicum L.).  Journal of Crop Improvement 27:113-123.


Ph.D. Plant Pathology, University of California, Davis. 1983


Integrated pest management; alternatives to synthetic chemical products for disease and pest control; solar energy in pest management; soil-plant ecology; pest issues in natural areas; biological, physical, and cultural management of reservoirs of weedy plant propagative materials; seed pathology; sustainable and appropriate pest management technologies

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