Abstract
In this study, the effects of a winter cover crop (CC) and its combination with composted cattle manure (CC-M) on the development of potato late blight (Phytophthora infestans) and crop yield were investigated and compared with a system with no cover crop (NC). In the CC and CC-M systems, winter oilseed rape (Brassica napus L) was used as the winter cover crop before potatoes. The hypothesis that the cover crop could be used as a possible control strategy against late blight in organic potato cultivation was not confirmed. Although the progression of foliar late blight damage in CC treatment was significantly slower in the early stages of disease development relative to NC, CC did not significantly reduce late blight at the later stages, or over the full season, and it did not increase tuber yield. Adding cattle manure to the CC treatment favoured late blight development and the damage was significantly more severe than in the other systems and tuber yield was nominally lower (though not significantly). The late blight pressure differed between treatments, with early disease development significantly slower on CC plots compared to CC-M in both growing seasons, but still not different to that in the plants grown in the NC system. Based on the results, in regions where oospores are a primary infection source, making P. infestans a soilborne pathogen, the use of cover crops may provide a sustainable strategy for reducing late blight damage in an organic system, but further investigation is needed.
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Claims 7
Claim · model-written summary
Cover crop slowed early foliar late blight damage versus no cover crop.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- CC treatmente0
- Outcome
- foliar late blight damagee0
- Direction
- slowere0
- Comparator
- NCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“progression of foliar late blight damage in CC treatment was significantly slower in the early stages of disease development relative to NC”
t0“potato late blight”
Claim · model-written summary
Cover crop did not significantly reduce late blight later or over the full season.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- CCe0
- Outcome
- late blighte0
- Direction
- did not significantly reducee0
- Qualifier
- at the later stages, or over the full seasone0
- Comparator
- no cover crop (NC)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CC did not significantly reduce late blight at the later stages, or over the full season”
e1“compared with a system with no cover crop (NC)”
t0“potato late blight”
Claim · model-written summary
Cover crop did not increase potato tuber yield.
- Taxon
- potatoesSolanum tuberosume1
- Treatment
- CCe1
- Outcome
- tuber yielde0
- Direction
- did not increasee0
- Comparator
- no cover crop (NC)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it did not increase tuber yield”
e1“In the CC and CC-M systems, winter oilseed rape (Brassica napus L) was used as the winter cover crop before potatoes”
e2“compared with a system with no cover crop (NC)”
Claim · model-written summary
Adding cattle manure to cover crop favored late blight and worsened damage versus other systems.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Adding cattle manure to the CC treatmente0
- Outcome
- late blight developmente0
- Direction
- favourede0
- Comparator
- the other systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adding cattle manure to the CC treatment favoured late blight development and the damage was significantly more severe than in the other systems”
t0“potato late blight”
Claim · model-written summary
Cover crop plus manure gave nominally lower tuber yield without statistical significance.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Adding cattle manure to the CC treatmente1
- Outcome
- tuber yielde0
- Direction
- lowere0
- Comparator
- the other systemse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tuber yield was nominally lower (though not significantly)”
e1“Adding cattle manure to the CC treatment”
e2“than in the other systems”
t0“potato late blight”
Claim · model-written summary
Early disease development was slower on CC than CC-M in both seasons.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- CC plotse0
- Outcome
- early disease developmente0
- Direction
- slowere0
- Qualifier
- in both growing seasonse0
- Comparator
- CC-Me0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“early disease development significantly slower on CC plots compared to CC-M in both growing seasons”
t0“potato late blight”
Claim · model-written summary
Authors suggest cover crops may reduce late blight damage where oospores are the primary infection source.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- P. infestans
Phytophthora infestanse0pathogen - Outcome
- use of cover crops may provide a sustainable strategy for reducing late blight damagee0
- Qualifier
- further investigation is needede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in regions where oospores are a primary infection source, making P. infestans a soilborne pathogen, the use of cover crops may provide a sustainable strategy for reducing late blight damage in an organic system, but further investigation is needed”
t0“potato late blight”
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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.