Associations among the communities of soil-borne pathogens, soil edaphic properties and disease incidence in the field p
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Associations among the communities of soil-borne pathogens, soil edaphic properties and disease incidence in the field pea root rot complex Kimberly Zitnick-Anderson & Luis E. del Río Mendoza & Shana Forster & Julie S. Pasche Received: 13 April 2020 / Accepted: 15 October 2020 # The Author(s) 2020
Abstract Background and aims Field pea production is greatly impacted by multiple soil-borne fungal and oomycete pathogens in a complex. The objectives of this research were to 1) identify the soil-borne pathogens associated with field pea in North Dakota and; 2) develop prediction models incorporating the occurrence of the soilborne pathogen communities, soil edaphic properties and disease incidence. Methods Soil and plants were sampled from 60 field pea fields in North Dakota during 2014 and 2015. Plants (1500 across two years) were rated for both root rot and soil-borne pathogens isolated from roots. Soils were analyzed for edaphic properties. Indicator species analysis was used to identify soil-borne pathogen
communities. Logistic regression was used to determine associations and develop prediction models. Results Survey results from 2014 and 2015 indicated that the most prevalent soil-borne pathogens identified in field pea fields were Fusarium spp. and Aphanomyces euteiches. Five soil-borne pathogen communities were identified; three of which had statistically significant associations characterized by (1) Fusarium acuminatum, (3) A. euteiches, and (4) Fusarium sporotrichioides. The occurrence of the three communities were associated with clay content, soil pH, Fe2+, and K+. Disease incidence was associated with the presence of either community 1 or 3 and K+. Conclusions The results generated from this research will contribute to the development of management strategies by providing a soil-borne pathogen community prediction tool.
Responsible Editor: Didier Lesueur
Keywords Soil-borne pathogens . Field pea root rot complex . Indicator species . Soil edaphic properties . Probability models
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11104-020-04745-4) contains supplementary material, which is available to authorized users. K. Zitnick-Anderson Department of Microbiology, North Dakota State University, Fargo, ND 58108-6050, USA L. E. del Río Mendoza : J. S. Pasche (*) Department of Plant Pathology, North Dakota State University, Fargo, ND 58108-6050, USA e-mail: [email protected] S. Forster North Central Research Extension Center, North Dakota State University, Minot, ND 58701, USA
Introduction US field pea (Pisum sativum L.) production occurs mainly in the Northern Great Plains, concentrated in Montana and North Dakota (www.nass.usda.gov). Aphanomyces root rot, caused by Aphanomyces euteiches Drechs, is responsible for shifting much of the pea production to drier environments with the intent of reducing favorable disease conditions
Plant Soil
(Papavizas and Ayers 1974). In North Dakota, field pea production reached a national high of 240,0
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