Abstract
Abstract Phytophthora root rot of soybean [ Glycine max (L.)Merr.], caused by Phytophthora megasperma Drechs, f. sp. glycinea Kaun and Erwin, is a major disease problem in the Upper Midwest. This study was conducted to determine soybean performance with metalaxyl [N‐ (2,6‐dimethyl phenyl)‐N‐(methylacetyl)alanine methyl ester] fungicide on cultivars with different resistance and tolerance to this disease under low to moderate Phytophthora root rot potentials. Yield, plant density, and a Phytophthora root rot index were determined for metalaxyl treatments applied at labeled rates in furrow (IF) and as a seed treatment (ST) on 10 cultivars in two Wisconsin locations in 1985 and 1986, and IF at 0, 85, 170, and 340 g a.i. ha −1 on five cultivars at two 1987 locations. Yields of two, four, and five cultivars were increased by metalaxyl ST, IF, or IF+ ST treatments, respectively, in two moderate Phytophthora root rot diseased environments. Soybean yields with ST did not differ from IF for any cultivar. The cultivar AP200 with IF+ST treatment yielded more than IF alone. The AP200 plant stand at V2 stage was increased by IF+ST compared with the control. In furrow metalaxyl treatment decreased plant stand compared with ST for ‘S18‐84’. In two 1985 and 1986 environments, without detected Phytophthora root rot, soybean yields were decreased by 280 g ha −1 metalaxyl applied IF at 0.42, 0.25, 0.26, and 0.20 Mg ha −1 for S18‐84, AP200, ‘Century 84’, and ‘L1771’, respectively. However, in additional studies conducted in 1987 at two locations in the absence of Phytophthora root rot, metalaxyl applied at 85 to 340 g ha −1 IF did not influence the yield of five cultivars. Metalaxyl can be an effective fungicide for soybean Phytophthora root rot control; however, yield for certain cultivars may be adversely affected where there is no disease control benefit.
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Claims 12
Claim · model-written summary
Seed treatment increased yields of two cultivars in moderately diseased environments.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- metalaxyl STe0
- Interactor
- Phytophthora
Phytophthorae0pathogen - Outcome
- Yields of twoe0
- Direction
- increasede0
- Qualifier
- two moderate Phytophthora root rot diseased environmentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields of two, four, and five cultivars were increased by metalaxyl ST, IF, or IF+ ST treatments, respectively, in two moderate Phytophthora root rot diseased environments.”
t0“Soybean Cultivar Response to Metalaxyl Applied In Furrow and as a Seed Treatment”
Claim · model-written summary
In furrow metalaxyl increased yields of four cultivars in moderately diseased environments.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- IFe0
- Interactor
- PhytophthoraPhytophthorae0pathogen
- Outcome
- Yieldse0
- Direction
- increasede0
- Qualifier
- foure0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields of two, four, and five cultivars were increased by metalaxyl ST, IF, or IF+ ST treatments, respectively, in two moderate Phytophthora root rot diseased environments.”
t0“Soybean Cultivar Response to Metalaxyl Applied In Furrow and as a Seed Treatment”
Claim · model-written summary
Combined in furrow and seed treatment increased yields of five cultivars in moderately diseased environments.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- IF+ STe0
- Interactor
- PhytophthoraPhytophthorae0pathogen
- Outcome
- Yieldse0
- Direction
- increasede0
- Qualifier
- fivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields of two, four, and five cultivars were increased by metalaxyl ST, IF, or IF+ ST treatments, respectively, in two moderate Phytophthora root rot diseased environments.”
t0“Soybean Cultivar Response to Metalaxyl Applied In Furrow and as a Seed Treatment”
Claim · model-written summary
Soybean yields with seed treatment did not differ from in furrow treatment for any cultivar.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- STe0
- Outcome
- Soybean yieldse0
- Direction
- did not differe0
- Comparator
- IFe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean yields with ST did not differ from IF for any cultivar.”
t0“Soybean Cultivar Response to Metalaxyl Applied In Furrow and as a Seed Treatment”
Claim · model-written summary
AP200 yielded more with the combined treatment than with in furrow treatment alone.
- Taxon
- SoybeanGlycine maxt0
- Material
- AP200e0
- Treatment
- IF+ST treatmente0
- Outcome
- yieldede0
- Direction
- moree0
- Comparator
- IF alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cultivar AP200 with IF+ST treatment yielded more than IF alone.”
t0“Soybean Cultivar Response to Metalaxyl Applied In Furrow and as a Seed Treatment”
Claim · model-written summary
Combined treatment increased AP200 plant stand at V2 relative to control.
- Taxon
- SoybeanGlycine maxt0
- Material
- AP200e0
- Organ / stage
- V2 stagee0
- Treatment
- IF+STe0
- Outcome
- plant stande0
- Direction
- increasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The AP200 plant stand at V2 stage was increased by IF+ST compared with the control.”
t0“Soybean Cultivar Response to Metalaxyl Applied In Furrow and as a Seed Treatment”
Claim · model-written summary
In furrow treatment reduced S18‐84 plant stand relative to seed treatment.
- Taxon
- SoybeanGlycine maxt0
- Material
- S18‐84e0
- Treatment
- In furrow metalaxyl treatmente0
- Outcome
- plant stande0
- Direction
- decreasede0
- Comparator
- STe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In furrow metalaxyl treatment decreased plant stand compared with ST for ‘S18‐84’.”
t0“Soybean Cultivar Response to Metalaxyl Applied In Furrow and as a Seed Treatment”
Claim · model-written summary
In the absence of detected root rot, in furrow metalaxyl reduced yield for S18‐84 by 0.42 Mg ha −1.
- Taxon
- SoybeanGlycine maxt0
- Material
- S18‐84e0
- Treatment
- 280 g ha −1 metalaxyl applied IFe0
- Interactor
- PhytophthoraPhytophthorae0pathogen
- Outcome
- soybean yieldse0
- Direction
- decreasede0
- Value
- 0.42e0
- Qualifier
- without detected Phytophthora root rote0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In two 1985 and 1986 environments, without detected Phytophthora root rot, soybean yields were decreased by 280 g ha −1 metalaxyl applied IF at 0.42, 0.25, 0.26, and 0.20 Mg ha −1 for S18‐84, AP200, ‘Century 84’, and ‘L1771’, respectively.”
t0“Soybean Cultivar Response to Metalaxyl Applied In Furrow and as a Seed Treatment”
Claim · model-written summary
In the absence of detected root rot, in furrow metalaxyl reduced yield for AP200 by 0.25 Mg ha −1.
- Taxon
- SoybeanGlycine maxt0
- Material
- AP200e0
- Treatment
- 280 g ha −1 metalaxyl applied IFe0
- Interactor
- PhytophthoraPhytophthorae0pathogen
- Outcome
- soybean yieldse0
- Direction
- decreasede0
- Value
- 0.25e0
- Qualifier
- without detected Phytophthora root rote0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In two 1985 and 1986 environments, without detected Phytophthora root rot, soybean yields were decreased by 280 g ha −1 metalaxyl applied IF at 0.42, 0.25, 0.26, and 0.20 Mg ha −1 for S18‐84, AP200, ‘Century 84’, and ‘L1771’, respectively.”
t0“Soybean Cultivar Response to Metalaxyl Applied In Furrow and as a Seed Treatment”
Claim · model-written summary
In the absence of detected root rot, in furrow metalaxyl reduced yield for Century 84 by 0.26 Mg ha −1.
- Taxon
- SoybeanGlycine maxt0
- Material
- Century 84e0
- Treatment
- 280 g ha −1 metalaxyl applied IFe0
- Interactor
- PhytophthoraPhytophthorae0pathogen
- Outcome
- soybean yieldse0
- Direction
- decreasede0
- Value
- 0.26e0
- Qualifier
- without detected Phytophthora root rote0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In two 1985 and 1986 environments, without detected Phytophthora root rot, soybean yields were decreased by 280 g ha −1 metalaxyl applied IF at 0.42, 0.25, 0.26, and 0.20 Mg ha −1 for S18‐84, AP200, ‘Century 84’, and ‘L1771’, respectively.”
t0“Soybean Cultivar Response to Metalaxyl Applied In Furrow and as a Seed Treatment”
Claim · model-written summary
In the absence of detected root rot, in furrow metalaxyl reduced yield for L1771 by 0.20 Mg ha −1.
- Taxon
- SoybeanGlycine maxt0
- Material
- L1771e0
- Treatment
- 280 g ha −1 metalaxyl applied IFe0
- Interactor
- PhytophthoraPhytophthorae0pathogen
- Outcome
- soybean yieldse0
- Direction
- decreasede0
- Value
- 0.20e0
- Qualifier
- without detected Phytophthora root rote0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In two 1985 and 1986 environments, without detected Phytophthora root rot, soybean yields were decreased by 280 g ha −1 metalaxyl applied IF at 0.42, 0.25, 0.26, and 0.20 Mg ha −1 for S18‐84, AP200, ‘Century 84’, and ‘L1771’, respectively.”
t0“Soybean Cultivar Response to Metalaxyl Applied In Furrow and as a Seed Treatment”
Claim · model-written summary
In 1987 disease free tests, in furrow metalaxyl did not change yield of five cultivars.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- metalaxyl applied at 85 to 340 g ha −1 IFe0
- Outcome
- yield of five cultivarse0
- Direction
- did not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“metalaxyl applied at 85 to 340 g ha −1 IF did not influence the yield of five cultivars.”
t0“Soybean Cultivar Response to Metalaxyl Applied In Furrow and as a Seed Treatment”
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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.