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
jjstapleton@ucanr.edu Create VCard

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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 Dahlquist-Willard, R.M., Marshall, M.N., Betts, S.L., Tuell-Todd, C.C., VanderGheynst, J.S., and Stapleton, J.J. Development and validation of a Weibull-Arrhenius model to predict thermal inactivation of Brassica nigra weed seeds under fluctuating temperature regimens. Biosystems Engineering 151:350-360.

2017 Oldfield, T.L., Achmon, Y., Perano, K.M., Dahlquist-Willard, R.M., VanderGheynst, J.S., Stapleton, J.J., Simmons, C.W., and Holden, N.M. A life cycle assessment of biosolarization as a valorization pathway for tomato pomace utilization in California, Journal of Cleaner Production 141:146-156.

2016 Achmon, Y., Fernandez-Bayo, J.D., Hernandez, K., McCurry, D.G., Harrold, D.R., Su, J., Dahlquist-Willard, R.M., Stapleton, J.J., VanderGheynst, J.S., and Simmons, C.W.  Weed seed inactivation in soil mesocosms via biosolarization with mature compost and tomato processing waste amendments.  Pest Management Science: DOI:10.1002/ps.4354.

2016 Simmons, C.W., Higgins, B., Staley, S., Joh, L.D., Simmons, B.A., Singer, S.W., Stapleton, J.J., and VanderGheynst, J.S. The role of organic matter amendment level on soil heating, organic acid accumulation, and development of bacterial communities in solarized soil. Applied Soil Ecology 106:37-46.

2016 Stapleton, J.J., Dahlquist, R.M., Achmon, Y., Marshall, M.N., VanderGheynst, J.S., and Simmons, C.W. Advances in biosolarization technology to improve soil health and organic control of soilborne pests. eOrganic Website. Online: https://www.youtube.com/watch?v=9ha_wLyQBLw

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  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


  • U.S. Fulbright Scholar. La Molina National Agrarian University, Lima, Peru
    Presented by Fulbright Scholar Program,  1996


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

Areas of Expertise (click to see all ANR academics with this expertise)

California Agriculture Article Contributions

ANR Workgroup Associations

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