California Agriculture
California Agriculture
California Agriculture
University of California
California Agriculture

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 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)

2018  Achmon, Y., Sade, N., Wilhelmi, M.D., Fernandez-Bayo, J.D., Harrold, D.R., Stapleton, J.J., VanderGheynst, J.S., Blumwald, E., and Simmons, C.W.  The effects of short-term biosolarization using mature compost and industrial tomato waste amendments on the generation and persistence of biocidal soil conditions and subsequent tomato growth.  Journal of Agricultural and Food Chemistry: DOI:10.1021/acs.jafc.8b00424.

2018  Fernandez-Bayo, J.D., Randall, T.E., Achmon, Y., Hestmark, K.V., Harrold, D.R., Su, J., Dahlquist-Willard, R.M., Gordon, T.R., Stapleton, J.J., VanderGheynst, J.S., and Simmons, C.W.  Effect of waste management practices on organic wastes to inactivate Brassica nigra and Fusarium oxysporum f.sp. lactucae using soil biosolarization.  Pest Management Science:  DOI:10.1002/ps.4891.

2017 Stapleton, J.J., and Orloff, S.B.  Pest Note: Dyer's Woad.  ANR Publication 74175, Davis, CA.

2017 Fernandez-Bayo, J.D., Achmon, Y., Harrold, D.R., Claypool, J.T., Simmons, B.A., Singer, S.W., Dahlquist-Willard, R.M., Stapleton, J.J., VanderGheynst, J.S., and Simmons, C.W.  Comparison of soil biosolarization with mesophilic and thermophilic solid digestates on soil microbial quantity and diversity.  Applied Soil Ecology 119: 183-191.

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

2017 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 78:862-873.

2016 Dahlquist-Willard, R.M., Marshall, M.N., Betts, S., Tuell-Todd, C., VanderGheynst, J.S., and Stapleton, J.J.  Development and validation of a Weibull-Arrhenius model to predict thermal inactivation of Brassica nigra seeds under fluctuating temperature regimens.  Biosystems Engineering 151:350-360.

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:

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.





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)


Peer Reviewed

  • WJ, Bentley; JL, Caprile, et al. (2016) UC IPM Pest Management Guidelines Apricot. UC ANR Publication 3433
  • CS, Stoddard; PB, Goodell, et al. (2016) UC IPM Pest Management Guidelines Cucurbits. UC ANR Publication 3445
  • J, Aguiar; RM, Davis, et al. (2016) UC IPM Pest Management Guidelines Eggplant. UC ANR Publication 3475

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