Abstract
Management of soilborne diseases is challenging in the winter wheat production system of the inland Pacific Northwest due to the lack of effective management options and increased adoption of no-till practices. To determine whether cover crops (CCs) could be a viable management tool for winter wheat soilborne disease in no-till dryland winter wheat systems, a 4-site-year study was conducted in northeastern Oregon under low and intermediate annual precipitation regimes. The treatments included three fall-planted CCs (winter lentil, winter pea, and fall mix), six spring-planted CCs (common vetch, phacelia, spring barley, tillage radish, yellow mustard, and spring mix), and a fallow control. The abundance of soilborne pathogens was quantified during the winter wheat phase following a single-year CC rotation. The abundance of soilborne pathogens varied between study sites. The CCs influenced the abundance of Fusarium pseudograminearum and Pythium clade F in crop year 2022/2023, but none significantly reduced the pathogen abundance compared with fallow. Most CCs increased Pythium clade F abundance in crop year 2022/2023 compared with fallow. There was no effect of CC on any pathogen in crop year 2021/2022. Overall, the results suggest that short-term, single-year CC rotations do not reduce the abundance of soilborne pathogens of winter wheat compared with fallow. This study highlights the need for longer-term CC studies to better understand their impacts on soilborne diseases of wheat. [Formula: see text] Copyright © 2026 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license .
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Claims 6
Claim · model-written summary
Soilborne pathogen abundance varied among study sites.
- Taxon
- Winter Wheat
Triticum aestivumt0 - Outcome
- abundance of soilborne pathogense0
- Setting
- study sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The abundance of soilborne pathogens varied between study sites”
t0“Winter Wheat”
Claim · model-written summary
Cover crops influenced Fusarium pseudograminearum abundance in 2022/2023, but did not significantly reduce it relative to fallow.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- CCse0
- Interactor
- Fusarium pseudograminearumFusarium pseudograminearume0pathogen
- Outcome
- abundance of Fusarium pseudograminearume0
- Direction
- reducede0
- Qualifier
- none significantlye0
- Comparator
- fallowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The CCs influenced the abundance of Fusarium pseudograminearum and Pythium clade F in crop year 2022/2023, but none significantly reduced the pathogen abundance compared with fallow”
t0“Winter Wheat”
Claim · model-written summary
Cover crops influenced Pythium clade F abundance in 2022/2023, but none significantly reduced pathogen abundance relative to fallow.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- CCse0
- Interactor
- Pythium clade Fe0pathogen
- Outcome
- Pythium clade Fe0
- Direction
- reducede0
- Comparator
- fallowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The CCs influenced the abundance of Fusarium pseudograminearum and Pythium clade F in crop year 2022/2023, but none significantly reduced the pathogen abundance compared with fallow”
t0“Winter Wheat”
Claim · model-written summary
Most cover crops increased Pythium clade F abundance in 2022/2023 compared with fallow.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- CCse0
- Interactor
- Pythium clade Fe0pathogen
- Outcome
- Pythium clade F abundancee0
- Direction
- increasede0
- Comparator
- fallowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most CCs increased Pythium clade F abundance in crop year 2022/2023 compared with fallow”
t0“Winter Wheat”
Claim · model-written summary
Cover crops had no effect on any pathogen in 2021/2022.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- CCe0
- Outcome
- any pathogene0
- Direction
- no effecte0
- Qualifier
- crop year 2021/2022e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no effect of CC on any pathogen in crop year 2021/2022”
t0“Winter Wheat”
Claim · model-written summary
The authors call for longer-term cover crop studies of wheat soilborne diseases.
- Taxon
- wheatTriticum aestivume0
- Outcome
- longer-term CC studiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study highlights the need for longer-term CC studies to better understand their impacts on soilborne diseases of wheat”
The same questions in other papers
cover crop · pest · Triticum aestivum (wheat)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
cover crop · organism · Triticum aestivum (wheat)Positive and negative results
2 papers in the same direction as this paper · 5 reporting no difference from an alternative
- positive
- positive
- positive
4 papers more in this group
See all 8 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.