Brenna J Aegerter

Farm Advisor

San Joaquin County
2101 East Earhart Ave, Suite 200
Stockton, CA, CA 95206-3924
209-953-6114
bjaegerter@ucanr.edu

http://cesanjoaquin.ucanr.edu

Education

Ph.D. Plant Pathology, UC Davis. 2001

M.S. Plant Pathology, UC Davis. 1997

B.S. Plant Science, UC Davis. 1995

Specialty

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

• Ag Commodities and Products - General
• Vegetable Crops
• Asparagus
• Bell Peppers
• Corn, Sweet
• Potatoes, Irish
• Peppers
• Tomatoes
• Tomatoes - General
• Tomatoes - Fresh
• Tomatoes - Processing
• Onions
• Cucurbits
• Cucumbers
• Watermelons
• Plants and Their Systems
• Plant Genetic Resources
• Plant Management Systems
• Pathogens and Nematodes Affecting Plants
• Weeds Affecting Plants
• Integrated Pest Management Systems
• Protect Food From Contamination By Pathogenic Microorganisms, Parasites, and Naturally Occurring Toxins
• Natural Resources and Environment
• Conservation and Efficient Use of Water
• Watershed Protection and Management
• Commercial
• Ipm
• Endemic Species
• Endemic and Invasive Pests and Diseases
• Safe and Secure Food Supplies
• Sustainable Food Systems

Bibliography

Peer Reviewed

• Sidhu, J., Dubose, J.F., Fernberg, J. and Aegerter, B.J. 2024. Evaluation of bactericides for management of bacterial leaf blight and bacterial bulb rot in onions, 2023. Plant Disease Management Reports 18:V064. https://www.plantmanagementnetwork.org/pub/trial/pdmr/volume18/abstracts/V064.asp

• Wilson, R.G., Aegerter, B.J., and LaHue, G. 2024. The influence of sprinkler and drip irrigation on the incidence and severity of bacterial disease in onions grown in northeast California. Plant Health Progress 25:293-298  https://doi.org/10.1094/PHP-01-24-0002-RS

• Aegerter, B.J. and Swett, C.L. 2024. Evaluation of processing tomato varieties for susceptibility to Fusarium stem rot and decline, 2023. Plant Disease Management Reports 18:V061. https://www.plantmanagementnetwork.org/pub/trial/pdmr/volume18/abstracts/V061.asp

• Sidhu, J., Dubose, J.F., Fernberg, J. and Aegerter, B.J. 2024. Evaluation of variety susceptibility to bacterial foliar disease and bacterial bulb rot in onions, 2022. Plant Disease Management Reports 18:V063. https://www.plantmanagementnetwork.org/pub/trial/pdmr/volume18/abstracts/V063.asp

• Sidhu, J., Dubose, J.F., Fernberg, J. and Aegerter, B.J. 2022. Evaluation of bactericides for management of bacterial leaf blight and bacterial bulb rot in onions, 2021. Plant Disease Management Reports 16:V026. https://doi.org/10.1094/PDMR16

• Paugh, K.R., Swett, C.L., Aegerter, B.J., and Koivunen, M. 2022. Evaluation of drip-applied fungicides and fumigant against Fusarium wilt in California processing tomato, 2019. Plant Disease Management Reports 16:V177. https://doi.org/10.1094/PDMR16

• Sidhu, J., and Aegerter, B.J. 2022. Evaluation of fungicides for management of southern blight in potatoes in CA, 2021. Plant Disease Management Reports 16:V127. https://doi.org/10.1094/PDMR16

• Wilson, R., Nicholson, K. and Aegerter, B. 2022. The influence of irrigation method on bacterial diseases of onion in northeast California, 2021. Plant Disease Management Reports 16:V154. https://doi.org/10.1094/PDMR16

• Bak, A., Nihranz, C.T., Patton, M.F., Aegerter, B.J., and Casteel, C.L. 2021. Evaluation of aminoethoxyvinylglycine (AVG) for control of vector-borne diseases in Solanaceous crops. Crop Protection 145:105640. https://doi.org/10.1016/j.cropro.2021.105640

• Miyao, G., Aegerter, B. and Wang, Z. 2021. Evaluation of grafting for processing tomato production in California's Central Valley. Acta Hortic. 1302:57-64. https://doi.org/10.17660/ActaHortic.2021.1302.8 

• Batuman, O., Turini, T.A., LeStrange, M., Stoddard, S., Miyao, G., Aegerter, B.J., Chen, L.-F., McRoberts, N., Ullman, D.E., and Gilbertson, R.L. 2020. Development of an IPM strategy for thrips and tomato spotted wilt virus in processing tomatoes in the Central Valley of California. Pathogens 9:636. https://doi.org/10.3390/pathogens9080636  

• Geisseler, D., Aegerter, B.J., Miyao, E.M., Turini, T. and Cahn, M. 2020. Nitrogen in soil and subsurface drip-irrigated processing tomato plants (Solanum lycopersicum L.) as affected by fertilization level. Scientia Horticulturae 261:108999. https://doi.org/10.1016/j.scienta.2019.108999

• Mosquera, S., Chen, L.-H., Aegerter, B., Miyao, E., Salvucci, A., Chang, T.-C., Epstein, L. and Stergiopoulos, I. 2019. Cloning of the cytochrome b gene from the tomato powdery mildew fungus Leveillula taurica reveals high levels of allelic variation and heteroplasmy for the G143A mutation. Frontiers in Microbiology 10:663. https://doi.org/10.3389/fmicb.2019.00663

• Geisseler, D., Miller, K.S., Aegerter, B.J., Clark, N.E, and Miyao, E.M. 2019. Estimation of annual soil nitrogen mineralization rates using an organic-nitrogen budget approach. Soil Science Society of America Journal 83: 1227-1235. https://doi.org/10.2136/sssaj2018.12.0473 

• Bak, A., Patton, M.F., Perilla-Henao, L.M., Aegerter, B.J. and Casteel, C.L. 2019. Ethylene signaling mediates potyvirus spread by aphid vectors. Oecologia 190:139-148. https://doi.org/10.1007/s00442-019-04405-0

• Miyao, G., Aegerter, B. and Chase, J. 2019.  Evaluation of grafting for processing tomato production in California’s Central Valley.  Acta Horticulturae 1233:83-88. https://doi.org/10.17660/ActaHortic.2019.1233.13

• Trouillas, F.P., Nouri, M.T., Lawrence, D.P., Moral, J., Travadon, R., Aegerter, B.J. and Lightle, D. Identification and characterization of Neofabraea kienholzii and Phlyctema vagabunda causing leaf and shoot lesions of olive in California. 2019. Plant Disease 103:3018-3030. https://doi.org/10.1094/PDIS-02-19-0277-RE

• Miller, K., Aegerter, B.J., Clark, N.E., Leinfelder-Miles, M., Miyao, E.M., Smith, R., Wilson, R. and Geisseler, D. 2019. Relationship between soil properties and nitrogen mineralization in undisturbed soil cores from California agroecosystems. Communications in Soil Science and Plant Analysis 50:77-92. https://doi.org/10.1080/00103624.2018.1554668

• Swett, C.L., Putman, A.I., Turini, T.A., and Aegerter, B. J. 2019 UC IPM Pest Management Guidelines: Onion/Garlic. Disease section.  University of California Agriculture and Natural Resources Publication 3453. (June 2019 revision

• Grieneisen, M. L., Aegerter, B.J., Stoddard, C.S. and Zhang, M.H. 2018. A global review of yields and fruit quality of grafted tomatoes and their potential for fumigant use reduction. Agriculture for Sustainable Development 38:29. https://doi.org/10.1007/s13593-018-0507-5

• Chen, L-F., Batuman, O., Aegerter, B. J., Willems, J. and Gilbertson, R. L. 2017. First report of curly top disease of pepper and tomato in California caused by the spinach curly top strain of Beet curly top virus. Plant Dis.101:1334. http://dx.doi.org/10.1094/PDIS-02-17-0206-PDN

• Salvucci, A., Aegerter, B.J., Miyao, E.M., Stergiopoulos, I. 2016. First report of powdery mildew caused by Oidium lycopersici in field-grown tomatoes in California. Plant Dis. 100:147. https://doi.org/10.1094/PDIS-11-15-1362-PDN

• Prichard, T.; Aegerter, B.J., et al.; Schwankl, L. (2015). Controlling offsite movement of agricultural chemical residues: Tomatoes. University of California Agriculture and Natural Resources, Oakland. Publication 8457.

• Aegerter, B.J., Stoddard, C.S., Miyao, E. M., Le Strange, M., Turini, T. A. 2015. Impact of powdery mildew (Leveillula taurica) on yield and fruit quality of processing tomatoes in California. Acta Hort. 1081: 153-158.

• Aegerter, B.J.; Smith, R., et al.; Natwick, E.; Gaskell, M.; Rilla, E. (2013). Pumpkin production in California. University of California Agriculture and Natural Resources, Oakland. Publication 7222, 5.

• Mitchell, J.P, K.M. Klonsky, E.M. Miyao, B.J. Aegerter, A. Shrestha, D.S. Munk, K.J. Hembree, N.M. Madden and T. Turini. 2012. Evolution of conservation tillage systems for processing tomato production in California¹s Central Valley. HortTechnology 22(5):617-626.

• Aegerter, B.J.; Davis, R.M. (2012). Greenhouse tomato production and plant health. Tomato Health Management.R. Davis, K. Pernezny and J. Broome. St. Paul, MN, American Phytopathological Society.
• Aegerter, B.J.; Broome, J.C. (2012). Pest management decision support systems. Tomato Health Management.R. Davis, K. Pernezny and J. Broome. St. Paul, MN, American Phytopathological Society.
• Aegerter, B.J.; Cahn, M., et al.; Koike, S.; Smith, R.; Hartz, T.; Suslow, T. (2011). Asparagus Production in California. University of California Agriculture and Natural Resources. Publication 7234, 6.

• Gordon, T. R., Kirkpatrick, S. C., Aegerter, B. J., Fisher, A. J., Storer, A. J., and Woods, D. L. 2011. Evidence for the occurrence of induced resistance to pitch canker, caused by Gibberella circinata (anamorph Fusarium circinatum), in populations of Pinus radiata. Forest Pathology 41:227-232.

• Aegerter, B.J.; Nunez, J., et al.; Van Horn, M.; Aguair, J.; McGiffen, M.E.; Smith, R.; Daugovish, O. (2011). Regional Differences in cover crop management. Cover Cropping for Vegetable Production. University of California Agriculture and Natural Resources. Publication 3517
• Aegerter, B.J.; Smith, R.F., et al.; Natwick, E.T.; Davis, R.M. (2011). Year-Round Integrated Pest Management Program for Asparagus. University of California Agriculture and Natural Resources. Publication 3435.
• Davis, R.M.; Aegerter, B.J. (2009). Asparagus. UC IPM Pest Management Guidelines, Disease Sections. University of California Agriculture and Natural Resources. Publication 3435.
• Davis, R.M.; Turini, T.A., et al.; Aegerter, B.J.; Stapleton, J.J. (2009). Cucurbits. UC IPM Pest Management Guidelines, Disease Sections. University of California Agriculture and Natural Resources. Publication 3445.
• Davis, R.M.; Aegerter, B.J. (2009). Onion/Garlic. UC IPM Pest Management Guidelines, Disease Sections. University of California Agriculture and Natural Resources. Publication 3453.

• Fisher, A. J., Aegerter, B. J., Gordon, T. R., Smith, L., and Woods, D. M. 2009. Puccinia jaceae var. solstitialis teliospore priming on yellow starthistle. Phytopathology 99:67-72.

• Hartz, T.; Miyao, G., et al.; Mickler, J.; LeStrange, M.; Stoddard, S.; Nunez, J.; Aegerter, B.J. (2008). Processing Tomato Production in California. University of California Agriculture and Natural Resources. Publication 7228.
• Aegerter, B.J.; Carlson, H., et al.; Davis, R.M.; Godfrey, L.D.; Haviland, D.R.; Nunez, J.; Shrestha, A. (2008). Year-Round Integrated Pest Management Program for Potatoes. University of California Agriculture and Natural Resources. Publication 3316.
• Davis, R.M.; Aegerter, B.J. (2007). Onion/Garlic. UC IPM Pest Management Guidelines, Disease Section. University of California Agriculture and Natural Resources. Publication 3453.

• Aegerter, B. J. 2007. Peronospora sparsa datasheet In: Crop Protection Compendium. Commonwealth Agricultural Bureau International, Wallingford, UK.

• Fisher, A. J., DiTomaso, J. M., Gordon, T. R., Aegerter, B. J., and Ayres, D. R. 2007. Salt marsh Claviceps purpurea in native and invaded Spartina marshes in Northern California. Plant Disease 91:380-386.  

• Aegerter, B. J., and Gordon, T. R. 2006. Rates of pitch canker induced seedling mortality among Pinus radiata families varying in levels of genetic resistance to Gibberella circinata (anamorph Fusarium circinatum). Forest Ecology and Management 235:14-17.

• Gordon, T. R., Kirkpatrick, S. C., Aegerter, B. J., Wood, D. L., and Storer, A. J. 2006. Susceptibility of Douglas fir (Pseudotsuga menziesii) to pitch canker, caused by Gibberella circinata (anamorph = Fusarium circinatum). Plant Pathology (Oxford) 55:231-237. 

• Hu, G., deHart, A. K. A., Li, Y., Ustach, C., Handley, V., Navarre, R., Hwang, C.-F., Aegerter, B. J., Williamson, V. M., and Baker, B. 2005. EDS1 in tomato is required for resistance mediated by TIR-class R genes and the receptor-like R gene Ve. Plant Journal 42:376-391.

• Vogler, D. R., Gordon, T. R., Aegerter, B. J., Kirkpatrick, S. C., Lunak, G. A., Stover, P., and Violett, P. 2004. First report of the pitch canker fungus (Fusarium circinatum) in the Sierra Nevada of California. Plant Disease 88:772.

• Gordon, T. R., Aegerter, B. J., and Friel, C. J. 2004. Stem Canker Diseases In: Encyclopedia of Forest Science, J. Burley, J. Evans and J. A. Youngquist, eds. Elsevier/Academic Press, St. Louis.

• Aegerter, B. J., Nunez, J. J., and Davis, R. M. 2003. Environmental factors affecting rose downy mildew and development of a forecasting model for a nursery production system. Plant Disease 87:732-738.

• Gordon, T. R., and Aegerter, B. J. 2003. Fusarium circinatum datasheet In: Crop Protection Compendium. Commonwealth Agricultural Bureau International, Wallingford, UK.

• Aegerter, B. J., Gordon, T. R., Storer, A. J., and Wood, D. L. 2003. Pitch Canker: A Technical Review. University of California Agriculture and Natural Resources Publication 21616.

• Koike, S. T., Gordon, T. R., and Aegerter, B. J. 2003. Root and basal rot of leek caused by Fusarium culmorum in California. Disease Note. Plant Disease 87:601.

• Aegerter, B. J., Nunez, J. J., and Davis, R. M. 2002. Detection and management of downy mildew in rose rootstock. Plant Disease 86:1363-1368.

• Aegerter, B. J., Greathead, A. S., Pierce, L. E., and Davis, R. M. 2002. Mefenoxam-resistant isolates of Pythium irregulare in an ornamental greenhouse in California. Disease Note. Plant Disease 86:692.

• Aegerter, B. J. 2002. Sections on Downy Mildew, Powdery Mildew, Brown Spot of Celery, and Phoma Crown and Root Rot In: Compendium of Umbelliferous Crop Diseases, R. M. Davis and R. N. Raid, eds. The American Phytopathological Society, St. Paul.

• Aegerter, B. J., Gordon, T. R., and Davis, R. M. 2000. Occurrence and pathogenicity of fungi associated with melon root rot and vine decline in California. Plant Disease 84:224-230.

• Aegerter, B. J., and Davis, R. M. 1998. First report of Pythium polymastum on broccoli and cauliflower in California. Disease Note. Plant Disease 82:1282.

• Gwynne, B. J., Gordon, T. T., and Davis, R. M. 1997. A new race of Fusarium oxysporum f. sp. melonis causing Fusarium wilt of muskmelon in the Central Valley of California. Plant Disease 81:1095.

• Davis, R. M., Miyao, E. M., Mullen, R. J., Valencia, J., May, D. M., and Gwynne, B. J. 1997. Benefits of applications of chlorothalonil for the control of black mold of tomato. Plant Disease 81:601-603.

ANR Workgroup Associations

• Vegetable Crops - Chair
• Pest Management in ANR - Member
• Plant Pathology - Member
• Spray Application Technology - Member
• Warm Season Vegetables - Member
• Weed - Member

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