Abstract
Experiments were conducted in Mato Grosso, Brazil, from 2009 to 2011 to evaluate the effects of planting date (October, November, December, and January) on soybean rust (SBR) and leaf area index (LAI) in SBR-susceptible soybean cultivars of different maturity groups (early-maturing, midseason, and late-maturing). Mean relative area under the LAI progress curve (RAULAIPC) was significantly higher (P < 0.05) for the late-maturing than early-maturing and midseason cultivars. The October planting date had significantly higher (P < 0.05) mean RAULAIPC than the December and January planting dates. Mean relative area under the SBR progress curve was significantly lower (P < 0.05) for the late-maturing than the midseason and early-maturing cultivars, and significantly higher (P < 0.05) for the December and January than the October and November planting dates. Based on the logistic population growth model, SBR severity increased over time at a significantly higher mean rate for the early-maturing than the midseason and late-maturing cultivars. It took longer for SBR to reach a certain severity level for the late-maturing cultivar planted in January than the early-maturing cultivar planted in October. This implies that fungicides would need to be applied early to the early-maturing cultivar planted in October to minimize yield loss.
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Claims 7
Claim · model-written summary
Late-maturing cultivars had higher LAI progress than early and midseason cultivars.
- Taxon
- Soybean
Glycine maxt0 - Material
- late-maturinge0
- Outcome
- relative area under the LAI progress curvee0
- Direction
- highere0
- Comparator
- early-maturing and midseason cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mean relative area under the LAI progress curve (RAULAIPC) was significantly higher (P < 0.05) for the late-maturing than early-maturing and midseason cultivars”
t0“in Soybean Cultivars”
Claim · model-written summary
October planting produced higher LAI progress than December and January planting.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- October planting datee0
- Outcome
- mean RAULAIPCe0
- Direction
- highere0
- Comparator
- December and January planting datese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The October planting date had significantly higher (P < 0.05) mean RAULAIPC than the December and January planting dates”
t0“in Soybean Cultivars”
Claim · model-written summary
Late-maturing cultivars had lower soybean rust progress than early and midseason cultivars.
- Taxon
- SoybeanGlycine maxt0
- Material
- late-maturinge0
- Outcome
- relative area under the SBR progress curvee0
- Direction
- lowere0
- Comparator
- midseason and early-maturing cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mean relative area under the SBR progress curve was significantly lower (P < 0.05) for the late-maturing than the midseason and early-maturing cultivars”
t0“in Soybean Cultivars”
Claim · model-written summary
December and January planting produced higher soybean rust progress than October and November planting.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- December and Januarye0
- Outcome
- relative area under the SBR progress curvee0
- Direction
- highere0
- Comparator
- October and November planting datese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mean relative area under the SBR progress curve was significantly lower (P < 0.05) for the late-maturing than the midseason and early-maturing cultivars, and significantly higher (P < 0.05) for the December and January than the October and November planting dates”
t0“in Soybean Cultivars”
Claim · model-written summary
Soybean rust severity rose faster in early-maturing than midseason and late-maturing cultivars.
- Taxon
- SoybeanGlycine maxt0
- Material
- early-maturinge0
- Outcome
- SBR severitye0
- Direction
- highere0
- Comparator
- midseason and late-maturing cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SBR severity increased over time at a significantly higher mean rate for the early-maturing than the midseason and late-maturing cultivars”
t0“in Soybean Cultivars”
Claim · model-written summary
Rust took longer to reach a given severity in late-maturing January-planted than early-maturing October-planted soybean.
- Taxon
- SoybeanGlycine maxt0
- Material
- late-maturing cultivare0
- Outcome
- SBR to reach a certain severity levele0
- Direction
- longere0
- Comparator
- early-maturing cultivar planted in Octobere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It took longer for SBR to reach a certain severity level for the late-maturing cultivar planted in January than the early-maturing cultivar planted in October”
t0“in Soybean Cultivars”
Claim · model-written summary
The authors recommend earlier fungicide application for early-maturing soybean planted in October.
- Taxon
- SoybeanGlycine maxt0
- Material
- early-maturing cultivare0
- Outcome
- fungicides would need to be applied earlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fungicides would need to be applied early to the early-maturing cultivar planted in October to minimize yield loss”
t0“in Soybean Cultivars”
The same questions in other papers
sowing time · growth · Glycine max (soybean)Positive and negative results
36 papers in the same direction as this paper · 34 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- negative
68 papers more in this group
See all 72 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.