Natalia James Ott

Orchard Crops Advisor

Cooperative Extension Tehama County
1754 Walnut Street
Red Bluff, CA 96080
530 527-3101
njott@ucanr.edu

http://cetehama.ucanr.edu

http://https://www.sacvalleyorchards.com/

Also in:
Butte County
Shasta County
Glenn County

Biography

I am a UCCE Orchard Systems Advisor for Tehama, Shasta, Glenn, and Butte Counties. My primary crop responsibilities are walnut, prune, almond, and olive, but I am happy to try and field questions about anything with chlorophyll. I am finishing up my PhD from the UC Davis Department of Plant Pathology, where I have done work assessing walnut and almond rootstocks for resistance to crown rot caused by Phytophthora. I have also been involved in testing whole orchard recycling in almonds and optimizing anaerobic soil disinfestation (ASD) as an alternative to fumigation when replanting almond orchards.

Education

M.S. Marine Science, College of William and Mary. 2012

B.S. Biology, emphasis in Plant Biology, University of California, Davis. 2009

Specialty

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

• Almonds
• Walnuts
• Figs
• Olives
• Plums
• Prunes
• Basic Plant Biology
• Pathogens and Nematodes Affecting Plants
• Pest Management/Diseases

Bibliography

Peer Reviewed

• Reddy, K.; Ott, N., et al.; Chavira, S.; Westphal, A.; Sudarshana, M. (In Press). First report of tomato ringspot virus infection of Krymsk 86 (Prunus cerasifera × P. persica), a hybrid rootstock, in California. Plant Disease.
• Ott, Natalia J; Nouri, Mohamed T, et al.; Browne, Greg T (In Press). Full-length ITS amplicon sequencing resolves Phytophthora species in surface waters used for orchard irrigation in California’s San Joaquin Valley. Plant Disease.
• Westphal, A.;  Maung, Z.T.Z., et al.;  Buzo, T.;  Brown, P.J.;  Leslie, C.A.;  Browne, G.T.;  Ott, N.J.;  McClean, A.; Kluepfel, D.A. (2024). Identifying walnut rootstocks with resistance to multiple soil-borne plant pathogens. European Journal of Horticultural Science. 89:2, 1-10.
• Gordon, P. E.; Ott, N. J., et al.; Brar, R. K.; Holtz, B. A.; Browne, G. T. (2024). Phosphorus Fertilization Can Improve Young Almond Tree Growth in Multiple Replant Settings. Hort Technology. 34, 161-171.
• Browne, G.T.; Ott, N.J., et al.; Yaghmour, M.A.; Fekete, B.C. (2024). Selection of new almond rootstocks with resistance to Phytophthora in California. Acta Horticulturae. 1406:12, 77-82.
• Khan, A. R.; Wicaksono, W. A., et al.; Ott, N. J.; Poret-Peterson, A. T.; Browne, G. T. (2022). Random forest analysis reveals taxa predictive of Prunus replant disease in peach root microbiomes. Plos one. 17:10. October 13.
• Khan, A. R.; Wicaksono, W. A., et al.; Ott, N. J.; Poret-Peterson, A. T.; Browne, G. T. (2021). Characterization of soils conducive and non-conducive to Prunus replant disease. Plos one. 16:12. December 10.
• Ramasamy, R.K.; Luo, M.C., et al.; Leslie, C.A.; Velasco, D.; Ott, N.; McClean, A.; Dandekar, A.M.; Aradhya, M.; Brown, P.J.; Browne, G.T.; Kluepfel, D.A. (2021). Co-located quantitative trait loci mediate resistance to Agrobacterium tumefaciens, Phytophthora cinnamomi, and P. pini in Juglans microcarpa× J. regia hybrids. Horticulture research. 8:111. 01 May 2021.
• Browne, G. T.; Hasey, J. K., et al.; Ott, N. J.; Forbes, H.; Arnold, K.; Milliron, L (2021). Flooding by California rivers results in walnut scion infections by species of Phytophthora. Plant Health Progress. 22:3, 368-373. February 17, 2021.
• Browne, G. T.; Ott, N. J., et al.; Forbes, H.; Yaghmour, M. A.; Milliron, L. K. (2020). First Report of Phytophthora chlamydospora Causing Crown and Root Rot on Almond in California. Plant Disease. 104:7, 2033-2033. May 5.
• Browne, G. T.; Ott, N. J., et al.; Fichtner, E. (2019). First Report of Phytopythium helicoides causing root rot on peach rootstock in California. Plant Disease. 103:11, 2968. August 20.
• Browne, G.T.; Ott, N.J., et al.; Poret-Peterson, A.T.; Lampinen, B.; Metcalf, S.G.; Yaghmour, M.A.; Holtz, B.; Culumber, M.; Brar, G.; and Doll, D. (2017). Anaerobic soil disinfestation as an alternative to soil fumigation for management of Prunus replant disease: effects on tree growth and yield. VII International Symposium on Almonds and Pistachios 1219. 287-294.
• Browne, G.; Ott, N., et al.; Poret-Peterson, A.; Gouran, H.; Lampinen, B. (2017). Efficacy of anaerobic soil disinfestation for control of Prunus replant disease. Plant disease. 102:1, 209-219. November 21.

ANR Workgroup Associations

• Prune - Chair
• Olive - Member
• Walnut - Member

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