Display options
Cite
Hofgaard IS, Seehusen T, Aamot HU, et al. Inoculum Potential of Fusarium spp. Relates to Tillage and Straw Management in Norwegian Fields of Spring Oats. Front Microbiol. 2016;7:556doi: 10.3389/fmicb.2016.00556.
Hofgaard, I. S., Seehusen, T., Aamot, H. U., Riley, H., Razzaghian, J., Le, V. H., Hjelkrem, A. G., Dill-Macky, R., & Brodal, G. (2016). Inoculum Potential of Fusarium spp. Relates to Tillage and Straw Management in Norwegian Fields of Spring Oats. Frontiers in microbiology, 7556. https://doi.org/10.3389/fmicb.2016.00556
Hofgaard, Ingerd S, et al. "Inoculum Potential of Fusarium spp. Relates to Tillage and Straw Management in Norwegian Fields of Spring Oats." Frontiers in microbiology vol. 7 (2016): 556. doi: https://doi.org/10.3389/fmicb.2016.00556
Hofgaard IS, Seehusen T, Aamot HU, Riley H, Razzaghian J, Le VH, Hjelkrem AG, Dill-Macky R, Brodal G. Inoculum Potential of Fusarium spp. Relates to Tillage and Straw Management in Norwegian Fields of Spring Oats. Front Microbiol. 2016 Apr 22;7:556. doi: 10.3389/fmicb.2016.00556. eCollection 2016. PMID: 27148236; PMCID: PMC4841101.
Copy Download .nbib Format: NLM
Share it on

Front Microbiol. 2016 Apr 22;7:556. doi: 10.3389/fmicb.2016.00556. eCollection 2016.

Inoculum Potential of Fusarium spp. Relates to Tillage and Straw Management in Norwegian Fields of Spring Oats.

Frontiers in microbiology

Ingerd S Hofgaard, Till Seehusen, Heidi U Aamot, Hugh Riley, Jafar Razzaghian, Vinh H Le, Anne-Grete R Hjelkrem, Ruth Dill-Macky, Guro Brodal

Affiliations

  1. Division of Biotechnology and Plant Health, Norwegian Institute of Bioeconomy Research Ås, Norway.
  2. Division of Biotechnology and Plant Health, Norwegian Institute of Bioeconomy ResearchÅs, Norway; Department of Plant Pathology, University of MinnesotaSt. Paul, MN, USA.

PMID: 27148236 PMCID: PMC4841101 DOI: 10.3389/fmicb.2016.00556

Abstract

The increased occurrence of Fusarium-mycotoxins in Norwegian cereals over the last decade, is thought to be caused by increased inoculum resulting from more cereal residues at the soil surface as a result of reduced tillage practices. In addition, weather conditions have increasingly promoted inoculum development and infection by Fusarium species. The objective of this work was to elucidate the influence of different tillage regimes (autumn plowing; autumn harrowing; spring plowing; spring harrowing) on the inoculum potential (IP) and dispersal of Fusarium spp. in spring oats. Tillage trials were conducted at two different locations in southeast Norway from 2010 to 2012. Oat residues from the previous year's crop were collected within a week after sowing for evaluation. IP was calculated as the percentage of residues infested with Fusarium spp. multiplied by the proportion of the soil surface covered with residues. Fusarium avenaceum and F. graminearum were the most common Fusarium species recovered from oat residues. The IP of Fusarium spp. was significantly lower in plowed plots compared to those that were harrowed. Plowing in either the autumn or spring resulted in a low IP. Harrowing in autumn was more effective in reducing IP than the spring harrowing, and IP levels for the spring harrowed treatments were generally higher than all other tillage treatments examined. Surprisingly low levels of F. langsethiae were detected in the residues, although this species is a common pathogen of oat in Norway. The percentage of the residues infested with F. avenaceum, F. graminearum, F. culmorum, and F. langsethiae generally related to the quantity of DNA of the respective Fusarium species determined using quantitative PCR (qPCR). Fusarium dispersal, quantified by qPCR analysis of spore trap samples collected at and after heading, generally corresponded to the IP. Fusarium dispersal was also observed to increase after rainy periods. Our findings are in line with the general understanding that plowing is a means to reduce the IP of Fusarium spp. in cereal fields. The main inoculum source for F. langsethiae remains unclear. Our results will be useful in the development of forecasting tools to calculate the risk of Fusarium in cereals.

Keywords: Fusarium avenaceum; Fusarium graminearum; Fusarium langsethiae; qPCR; spore traps; straw residues

References

  1. J Environ Monit. 2006 Dec;8(12):1235-41 - PubMed
  2. Annu Rev Phytopathol. 1998;36:485-500 - PubMed
  3. Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2010 Jun;27(6):842-52 - PubMed
  4. PLoS One. 2015 Sep 24;10(9):e0138860 - PubMed
  5. Phytopathology. 2010 Jan;100(1):49-57 - PubMed
  6. Phytopathology. 2007 Aug;97(8):971-8 - PubMed
  7. Phytopathology. 2008 Jan;98(1):69-78 - PubMed

Publication Types