Abstract
Abstract Intercropping a grain legume with a grain nonlegume is of increased interest by producers in the Canadian Prairies, especially under organic production where intercropping is an alternative to the lack of economic returns of green manure or summer fallow. Information on the impacts of intercropping on root rot, a significant challenge for legume crops, is needed. The objective of this organic study, conducted over 2 years (2017–2018) in the semiarid Canadian Prairies, was to determine how intercrops of lentil ( Lens culinaris Medik.)–yellow mustard ( Sinapis alba L.) and field pea ( Pisum sativum L.)–oat ( Avena sativa L.), at different seeding ratios, might affect in‐season root rot development and associated fungal communities. This 2‐year study showed that the impacts of intercropping varied between crop combinations and among fungal species. Multiple pathogens, as well as saprophytes, were associated with the intercrops and respective monocultures, with most being Fusarium species. For intercropped lentil, there was a >50% reduction in the mean root rot severity, and an 11% reduction in the isolation of total Fusarium species, compared to its monoculture. These results suggest disease suppression in the intercropped lentil, which might be attributed to allelopathy from mustard leading to an increase in fungi with biocontrol potential (antagonists). These antagonist fungi were 84% higher in lentil intercropped with a full mustard ratio than in its monoculture. In contrast, root rot in pea intercropped with oat was mostly higher than in the pea monoculture, attributed to the prevalence of similar species, including Fusarium pathogens, common to both crop species.
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Claims 7
Claim · model-written summary
Intercropped lentil had a >50% reduction in mean root rot severity compared with its monoculture.
- Taxon
- lentil
Lens culinarise0 - Treatment
- intercroppede0
- Outcome
- mean root rot severitye0
- Direction
- reductione0
- Value
- >50%e0
- Comparator
- its monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For intercropped lentil, there was a >50% reduction in the mean root rot severity, and an 11% reduction in the isolation of total Fusarium species, compared to its monoculture”
Claim · model-written summary
Intercropped lentil had an 11% reduction in the isolation of total Fusarium species compared with its monoculture.
- Taxon
- lentilLens culinarise0
- Treatment
- intercroppede0
- Outcome
- isolation of total Fusarium speciese0
- Direction
- reductione0
- Value
- 11%e0
- Comparator
- its monoculturee0
FusariumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For intercropped lentil, there was a >50% reduction in the mean root rot severity, and an 11% reduction in the isolation of total Fusarium species, compared to its monoculture”
Claim · model-written summary
Antagonist fungi were 84% higher in lentil intercropped with a full mustard ratio than in its monoculture.
- Taxon
- lentilLens culinarise0
- Treatment
- intercropped with a full mustard ratioe0
- Interactor
- antagonist fungie0biocontrol_agent
- Outcome
- antagonist fungie0
- Direction
- highere0
- Value
- 84%e0
- Comparator
- its monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These antagonist fungi were 84% higher in lentil intercropped with a full mustard ratio than in its monoculture”
Claim · model-written summary
Root rot in pea intercropped with oat was mostly higher than in the pea monoculture.
- Taxon
- pea
Lathyrus oleraceuse0 - Treatment
- intercropped with oate0
- Outcome
- root rote0
- Direction
- highere0
- Comparator
- the pea monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In contrast, root rot in pea intercropped with oat was mostly higher than in the pea monoculture”
Claim · model-written summary
Multiple pathogens and saprophytes were associated with the intercrops and monocultures, most being Fusarium species.
- Outcome
- Multiple pathogens, as well as saprophytese0
Not reportedTaxon
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Multiple pathogens, as well as saprophytes, were associated with the intercrops and respective monocultures, with most being Fusarium species”
Claim · model-written summary
Disease suppression in intercropped lentil might be attributed to allelopathy from mustard increasing fungi with biocontrol potential.
- Taxon
- lentilLens culinarise0
- Outcome
- disease suppressione0
- Qualifier
- allelopathy from mustard leading to an increase in fungi with biocontrol potential (antagonists)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“disease suppression in the intercropped lentil, which might be attributed to allelopathy from mustard leading to an increase in fungi with biocontrol potential (antagonists)”
Claim · model-written summary
Higher root rot in pea intercropped with oat was attributed to the prevalence of similar species, including Fusarium pathogens, common to both crop species.
- Taxon
- peaLathyrus oleraceuse0
- Outcome
- root rote0
- Qualifier
- prevalence of similar species, including Fusarium pathogens, common to both crop speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root rot in pea intercropped with oat was mostly higher than in the pea monoculture, attributed to the prevalence of similar species, including Fusarium pathogens, common to both crop species”
The same questions in other papers
intercropping · disease · Lathyrus oleraceus (pea)Positive and negative results
1 paper in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 papers →intercropping · disease · Lens culinaris (lentil)Results agree
1 paper in the same direction as this paper
- positive
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.