Abstract
Sclerotinia stem rot (SSR), caused by Sclerotinia sclerotiorum (Lib.) de Bary, is an important soybean [ Glycine max (L.) Merr.] disease in the North Central States. The effect of tillage, crop sequence, and cultivar on SSR incidence and soybean yield was evaluated in a 3‐yr on‐farm study conducted at Janesville, Sharon, and Waunakee, WI. In the study, arranged in a split‐split‐split‐split plot design, main plots were tillage: moldboard (MB), chisel plow (CP), or no‐till (NT); subplots were 1995 crops: corn ( Zea mays L.), small grain, or soybean; sub‐subplots were 1996 crops: corn, small grain, or soybean cultivar. Sub‐sub‐subplots were soybean cultivars planted in 1997. In 1997, SSR incidence averaged >40% at Janesville and Waunakee, and <1% at Sharon; and was lowest in NT ( P < 0.001) or when the soybean cultivar S19–90 was planted ( P < 0.001). Planting corn or oat ( Avena sativa L.) the preceding year (1996) reduced SSR incidence in 1997 ( P < 0.001). Yield was highest in NT ( P < 0.001), in S19–90 ( P < 0.001), and following oat ( P < 0.001). Sclerotial density was affected by tillage ( P < 0.001). Apothecial numbers were greatest in MB and lowest in NT. Because brown stem rot, Phialophora gregata (Allington and Chamberlain) W. Gams, and SSR developed at Janesville, there was a simple linear relationship between yield and SSR incidence ( R 2 = 0.35, P < 0.01) only at Waunakee. Soybean yields were greatest when S19–90 was planted in NT following corn or oat.
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Claims 12
Claim · model-written summary
Stem rot incidence exceeded 40% at Janesville and Waunakee and was below 1% at Sharon.
- Taxon
- Soybean
Glycine maxt0 - Outcome
- SSR incidencee0
- Value
- >40%e0
- Setting
- Janesville and Waunakeee0
Not reportedInteractor
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SSR incidence averaged >40% at Janesville and Waunakee, and <1% at Sharon”
t0“Soybean”
Claim · model-written summary
Stem rot incidence at Sharon was below 1%.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- SSR incidencee0
- Value
- <1%e0
- Setting
- Sharone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SSR incidence averaged >40% at Janesville and Waunakee, and <1% at Sharon”
t0“Soybean”
Claim · model-written summary
No-till had the lowest stem rot incidence.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- NTe0
- Outcome
- SSR incidencee0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SSR incidence averaged >40% at Janesville and Waunakee, and <1% at Sharon; and was lowest in NT ( P < 0.001)”
e1“no‐till (NT)”
t0“Soybean”
Claim · model-written summary
Cultivar S19–90 had the lowest stem rot incidence.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when the soybean cultivar S19–90 was planted ( P < 0.001)”
e1“SSR incidence averaged >40% at Janesville and Waunakee, and <1% at Sharon; and was lowest”
Claim · model-written summary
Planting corn or oat in the preceding year reduced soybean stem rot incidence.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Planting corn or oat ( Avena sativa L.) the preceding year (1996)e0
- Outcome
- SSR incidencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Planting corn or oat ( Avena sativa L.) the preceding year (1996) reduced SSR incidence in 1997 ( P < 0.001).”
t0“Soybean”
Claim · model-written summary
Soybean yield was highest under no-till.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- NTe0
- Outcome
- Yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield was highest in NT ( P < 0.001)”
t0“Soybean”
Claim · model-written summary
Soybean cultivar S19–90 had the highest yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield was highest in NT ( P < 0.001), in S19–90 ( P < 0.001)”
t0“Soybean”
Claim · model-written summary
Soybean yield was highest following oat.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- following oate0
- Outcome
- Yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield was highest in NT ( P < 0.001), in S19–90 ( P < 0.001), and following oat ( P < 0.001)”
t0“Soybean”
Claim · model-written summary
Tillage affected sclerotial density.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- tillagee0
- Outcome
- Sclerotial densitye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sclerotial density was affected by tillage ( P < 0.001)”
t0“Soybean”
Claim · model-written summary
Apothecia were most numerous under moldboard tillage and least numerous under no-till.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apothecial numbers were greatest in MB and lowest in NT”
t0“Soybean”
Claim · model-written summary
Yield and stem rot incidence had a linear relationship only at Waunakee.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- yield and SSR incidencee0
- Value
- R 2 = 0.35e0
- Setting
- Waunakeee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a simple linear relationship between yield and SSR incidence ( R 2 = 0.35, P < 0.01) only at Waunakee”
t0“Soybean”
Claim · model-written summary
Soybean yields were greatest when S19–90 was planted without tillage following corn or oat.
- Taxon
- SoybeanGlycine maxe0
- Material
- S19–90e0
- Treatment
- S19–90 was planted in NT following corn or oate0
- Outcome
- Soybean yieldse0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean yields were greatest when S19–90 was planted in NT following corn or oat.”
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See all 390 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.