University of California, Riverside

Department of Nematology

Ole Becker's Faculty Page

Ole becker

J. Ole Becker

Cooperative Extension Specialist & Nematologist

Office:2250B Spieth Hall

Office phone: (951) 827-2185

Mailing address: Dept. Nematology

1463 Boyce Hall

Fax: (951) 827-3719



Dr. Becker has been a faculty member in the Department of Nematology since 1992. In addition to basic and mission-oriented research on biology, ecology, and management of plant-parasitic nematodes, he focuses on extending information about integrated pest management to county advisors, growers, industry representatives and the general public.


Former Institutions

Ciba-Geigy Ltd., Basel, Switzerland

Plant Genetic Systems, Ghent, Belgium


2007 Fellow, American Association for the Advancement of Science

2007 Invitational Fellowship, Japan Society for the Promotion of Science

2002-03 UC Riverside Non-Senate Distinguished Researcher Award

1999 California Association of Nurseryman, Centinela Chapter Research Award

1997 Society of Nematologists Novartis Award for Outstanding Contributions to Agriculture


Research Areas

Integrated pest management of plant-parasitic nematodes.


Recent, selected Publications

Moriyama, Y., H. Yamaura, J.O. Becker, and R. Fukui 2018. Soil biological and physiochemical factors limiting the growth potential of tomato planted in waterlogged volcanic soil. Journal of Plant Nutrition 41:2151-2169.


Koch, E., J.O. Becker, G. Berg, R. Hauschild, J. Jehle, J. Köhl, and K. Smalla 2018. Biocontrol of plant diseases is not an unsafe technology! Journal of Plant Diseases and Protection 125:121–125.

Mundo-Ocampo, M., J.G. Baldwin, T.J. Pereira, J.R. Camacho-Baez, A.D. Armenta-Bojorquez, M. Camacho-Haro, and J.O. Becker 2017. Occurrence of Belonolaimus in Sinaloa, Northwestern Mexico: A New Report on Distribution and Host Range. Journal of Nematology 49(1):103–113.

Becker, J.O. 2014. Plant Health Management: Crop Protection with Nematicides. In: Neal Van Alfen, editor-in-chief. Encyclopedia of Agriculture and Food Systems, Vol. 4, San Diego: Elsevier, pp. 400-407.

Mathews, D.M., J.O. Becker, and S. Tjosvold 2014. Plant Diseases. Chapter 13. In: Newman, J. (ed) Container Nursery Production and Business Management Manual. Univ. of Calif. Agric. and Nat. Resour. Publication 3540. Richmond, CA. pp.178-200.

Becker, J.O. 2014. Citrus Pest Management: Nematodes. In: UC Citrus Production Manual, eds. L. Ferguson, E. E. Grafton-Cardwell., Univ. of Calif. Agric. and Nat. Resour. Publication 3539 pp. 303-306.

Smith Becker, J., J. Borneman, and J.O. Becker 2013. Dactylella oviparasitica parasitism of the sugar beet cyst nematode observed in trixenic culture plates. Biological Control 64:51-56.

Luo, L., S. R. Yates, D. J. Ashworth, R. Xuan, and J.O. Becker 2013. Effect of films on 1,3-dichloropropene and chloropicrin emission, soil concentration, and root-knot nematode control in a raised bed. Journal of Agricultural and Food Chemistry 61:2400-2406.

Yang, J., P.M. Ruegger, M.V. McKenry, J.O. Becker, and J. Borneman 2012. Correlations between root-associated microorganisms and peach replant disease symptoms in a California soil. PLoS ONE 7(10): e46420. doi:10.1371/journal.pone.0046420

Matsui, M., H. Honjo, J.O. Becker, and R. Fukui 2012. Temperature-dependent effects of soil amendment with crop residues on suppression of Rhizoctonia damping-off of sugar beet. Plant and Soil 348:467-477.

Yang, J., S. Benecke, D.R. Jeske, F. Rocha, J. Smith-Becker, P. Timper, J.O. Becker, and J. Borneman 2012. Population dynamics of Dactylella oviparasitica and Heterodera schachtii: toward a decision model for sugar beet planting. Journal of Nematology 44:237-244.

Yang, J., A. Loffredo, J. Borneman, and J.O. Becker 2012. Biocontrol efficacy among strains of Pochonia chlamydosporia obtained from a root-knot nematode suppressive soil. Journal of Nematology 44:67-71.

Watanabe, K., M. Matsui, H. Honjo, J.O. Becker, and R. Fukui 2011. Effects of soil pH on Rhizoctonia damping-off of sugar beet and disease suppression induced by soil amendment with crop residues. Plant Soil 347:255-268.

Westphal, A., A. Pyrowolakis, R.A. Sikora, and J.O. Becker 2011. Occurrence of soil suppressiveness against Heterodera schachtii in California cropping areas. Nematropica 41:161-171.

Borneman, J. and J.O. Becker 2007. Identifying Microorganisms Involved in Specific Pathogen Suppression in Soil. Annual Review of Phytopathology 45:153-72.

More Information

General Campus Information

University of California, Riverside
900 University Ave.
Riverside, CA 92521
Tel: (951) 827-1012

Department Information

Department of Nematology
Margarita Flores
1447 Boyce Hall

Tel: (951) 827-3598
Fax: (951) 827-2364