Abstract
The effect of 4-yr soybean rotations with corn (CCCS vs. CCSS vs. SSSS) and soil amendments (urban compost vs. mineral fertilizer) on Sclerotinia stem rot of soybean (disease severity index, apothecia number, sclerotia survival), caused by Sclerotinia sclerotiorum, was studied on two soils (clay loam and sandy loam) at Saint-Hyacinthe, in southwestern Québec, from 1999 to 2002. In 2002, the 3-yr-corn rotation had a significant effect on the disease severity index (DSI) at the clay loam site; DSI was greatly reduced by rotation (5.2%) compared with monoculture (44.3%). At the sandy loam site, an interaction between rotation and fertility amendments reduced DSI from 71.7% in the monoculture to 37.8% in the 3-yr-corn rotation amended with compost. Canonical redundancy analysis (RDA) of the DSI-apothecia matrix in 2002 confirmed the suppressiveness of the 3-yr-corn rotation and revealed a significant conducive effect on DSI of compost at the clay loam site. At the sandy loam site, RDA of the DSI-apothecia matrix confirmed suppressive interaction between corn-soybean rotations and compost amendment. Key words: Sclerotinia stem rot of soybean, crop rotation, urban compost, multiple regression, canonical redundancy analysis, permutations test
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Claims 5
Claim · model-written summary
The 3-year corn rotation significantly reduced Sclerotinia stem rot disease severity index at the clay loam site (5.2% vs 44.3% in monoculture) in 2002.
- Taxon
- soybean
Glycine maxt0 - Treatment
- 3-yr-corn rotatione1
- Interactor
- Sclerotinia sclerotiorum
Sclerotinia sclerotiorume0pathogen - Outcome
- disease severity index (DSI)e1
- Direction
- greatly reducede1
- Value
- 5.2%e1
- Qualifier
- 44.3%e1
- Comparator
- monoculturee1
- Setting
- clay loam sitee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sclerotinia stem rot on soybean”
e0“Sclerotinia stem rot of soybean (disease severity index, apothecia number, sclerotia survival), caused by Sclerotinia sclerotiorum”
e1“In 2002, the 3-yr-corn rotation had a significant effect on the disease severity index (DSI) at the clay loam site; DSI was greatly reduced by rotation (5.2%) compared with monoculture (44.3%)”
Claim · model-written summary
At the sandy loam site, an interaction of rotation and compost amendment reduced disease severity index from 71.7% in monoculture to 37.8%.
- Taxon
- soybeanGlycine maxt0
- Treatment
- 3-yr-corn rotation amended with composte2
- Outcome
- DSIe2
- Direction
- reducede2
- Value
- 37.8%e2
- Qualifier
- from 71.7%e2
- Comparator
- monoculturee2
- Setting
- sandy loam sitee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sclerotinia stem rot on soybean”
e2“At the sandy loam site, an interaction between rotation and fertility amendments reduced DSI from 71.7% in the monoculture to 37.8% in the 3-yr-corn rotation amended with compost”
Claim · model-written summary
Redundancy analysis confirmed the suppressiveness of the 3-year corn rotation against Sclerotinia stem rot of soybean.
- Taxon
- soybeanGlycine maxt0
- Treatment
- 3-yr-corn rotatione3
- Outcome
- suppressivenesse3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sclerotinia stem rot on soybean”
e3“Canonical redundancy analysis (RDA) of the DSI-apothecia matrix in 2002 confirmed the suppressiveness of the 3-yr-corn rotation”
Claim · model-written summary
Compost amendment had a significant conducive effect on the disease severity index at the clay loam site.
- Taxon
- soybeanGlycine maxt0
- Treatment
- composte4
- Outcome
- DSIe4
- Direction
- increaseinferrede4
- Setting
- clay loam sitee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sclerotinia stem rot on soybean”
e4“revealed a significant conducive effect on DSI of compost at the clay loam site”
Claim · model-written summary
At the sandy loam site, redundancy analysis confirmed a suppressive interaction between corn-soybean rotations and compost amendment.
- Taxon
- soybeanGlycine maxt0
- Treatment
- corn-soybean rotations and compost amendmente5
- Outcome
- DSI-apothecia matrixe5
- Setting
- sandy loam sitee5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sclerotinia stem rot on soybean”
e5“At the sandy loam site, RDA of the DSI-apothecia matrix confirmed suppressive interaction between corn-soybean rotations and compost amendment”
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See all 41 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.