Annika Peterson

Annika Peterson

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Department of Plant, Soil and Microbial Sciences




  • B.S., Plant Pathology and Spanish, University of Wisconsin-Madison

Michigan is the second state in the nation in celery production following California. Michigan celery growers grow celery for fresh market as well as processing. In recent years, there has been a rise in crown rot and vascular wilt disease in celery, thought to be caused by Fusarium species. Fusarium is a large group of soil borne fungi that causes root rots and vascular wilts in many hosts. My research focuses on determining which Fusarium species are present cause disease where celery is grown. Testing pathogenicity of fungal isolates is necessary to determine which pathogen is responsible for crown rot and wilt disorder in Michigan celery. The goal of this project is to understand pathogen species associated with diseased celery and their potential to cause disease. Learning more about the pathogen will help to determine the best disease management strategies. I am working with celery growers in southwest Michigan to obtain samples and learn more about how Fusarium and other pathogens impact celery.

Annika’s Publications

Keller-Pearson, M., Liu, Y., Peterson, A., Pederson, K., Williems, L. Ané, J., Silva, E.M. 2020. Inoculation with arbuscular mycorrhizal fungi has a more significant positive impact on the growth of open-pollinated heirloom varieties of carrots than on hybrid cultivars under organic management conditions. Agriculture, Ecosystems, & Environment:289.

Peterson, A.M., Engfehr, C.L. and Hausbeck, M.K.  2020.  Evaluation of fungicide programs for control of early blight of celery.  Plant Disease Management Report.  PDMR 14:V162.

Hausbeck, M.K., Peterson, A., and Perla, D.  2019.  Celery pathology update.  Pages 6-7 in: Celery Session Summaries, Great Lakes Fruit, Vegetable and Farm Market Expo, Grand Rapids, MI, Dec.  Online.