Abstract
Foliar diseases can significantly impact soybeans in Indiana, and fungicides can be an effective management tool to protect yield against disease. Fourteen foliar fungicide products were evaluated for efficacy on soybean foliar diseases and yield in 10 field trials from 2019 to 2021 in Indiana. Fungicides were applied at their recommended rates in a single application at the beginning pod (R3) growth stage. Cercospora leaf blight ( Cercospora spp.), brown spot ( Septoria glycines Hemmi), and frogeye leaf spot ( Cercospora sojina Hara) were the most prominent foliar diseases observed in the trials. Under low to moderate Cercospora leaf blight disease pressure, there were no significant differences between foliar fungicides and the nontreated control averaged across all site-years. In contrast, all foliar fungicides significantly suppressed brown spot from 69 to 92% relative to the nontreated control. Only bixafen + flutriafol and azoxystrobin + pydiflumetofen + propiconazole significantly suppressed frogeye leaf spot severity over the nontreated control. Foliar fungicide applications did not significantly increase yield over the nontreated control across all site-years. Therefore, under low to moderate foliar disease risk, fungicide applications may not be warranted in Indiana. Growers should continue to scout soybean fields prior to the beginning pod (R3) growth stage, then make an informed, sustainable decision to use a fungicide for disease management.
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Claims 8
Claim · model-written summary
The most prominent foliar diseases observed in the Indiana soybean trials were Cercospora leaf blight, brown spot and frogeye leaf spot.
- Taxon
- soybeans
Glycine maxe1 - Interactor
- Cercospora spp.
Cercosporae3pathogen - Outcome
- most prominent foliar diseasese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Foliar diseases can significantly impact soybeans in Indiana”
e3“Cercospora leaf blight ( Cercospora spp.), brown spot ( Septoria glycines Hemmi), and frogeye leaf spot ( Cercospora sojina Hara) were the most prominent foliar diseases observed in the trials”
Claim · model-written summary
Under low to moderate Cercospora leaf blight pressure, foliar fungicides did not differ significantly from the nontreated control.
- Taxon
- soybeansGlycine maxe1
- Treatment
- foliar fungicidese4
- Interactor
- Cercospora spp.Cercosporae3pathogen
- Outcome
- Cercospora leaf blighte4
- Direction
- no_changeinferrede4
- Comparator
- nontreated controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Foliar diseases can significantly impact soybeans in Indiana”
e3“Cercospora leaf blight ( Cercospora spp.), brown spot ( Septoria glycines Hemmi), and frogeye leaf spot ( Cercospora sojina Hara) were the most prominent foliar diseases observed in the trials”
e4“Under low to moderate Cercospora leaf blight disease pressure, there were no significant differences between foliar fungicides and the nontreated control averaged across all site-years”
Claim · model-written summary
All foliar fungicides significantly suppressed brown spot by 69 to 92% relative to the nontreated control.
- Taxon
- soybeansGlycine maxe1
- Treatment
- all foliar fungicidese5
- Interactor
- Septoria glycines HemmiSeptoria glycinese3pathogen
- Outcome
- brown spote5
- Direction
- suppressede5
- Value
- 69 to 92%e5
- Comparator
- nontreated controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Foliar diseases can significantly impact soybeans in Indiana”
e3“Cercospora leaf blight ( Cercospora spp.), brown spot ( Septoria glycines Hemmi), and frogeye leaf spot ( Cercospora sojina Hara) were the most prominent foliar diseases observed in the trials”
e5“all foliar fungicides significantly suppressed brown spot from 69 to 92% relative to the nontreated control”
Claim · model-written summary
Bixafen + flutriafol significantly suppressed frogeye leaf spot severity relative to the nontreated control.
- Taxon
- soybeansGlycine maxe1
- Treatment
- bixafen + flutriafole6
- Interactor
- Cercospora sojina Hara
Cercospora sojinae3pathogen - Outcome
- frogeye leaf spot severitye6
- Direction
- suppressede6
- Comparator
- nontreated controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Foliar diseases can significantly impact soybeans in Indiana”
e3“Cercospora leaf blight ( Cercospora spp.), brown spot ( Septoria glycines Hemmi), and frogeye leaf spot ( Cercospora sojina Hara) were the most prominent foliar diseases observed in the trials”
e6“Only bixafen + flutriafol and azoxystrobin + pydiflumetofen + propiconazole significantly suppressed frogeye leaf spot severity over the nontreated control”
Claim · model-written summary
Azoxystrobin + pydiflumetofen + propiconazole significantly suppressed frogeye leaf spot severity relative to the nontreated control.
- Taxon
- soybeansGlycine maxe1
- Treatment
- azoxystrobin + pydiflumetofen + propiconazolee6
- Interactor
- Cercospora sojina HaraCercospora sojinae3pathogen
- Outcome
- frogeye leaf spot severitye6
- Direction
- suppressede6
- Comparator
- nontreated controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Foliar diseases can significantly impact soybeans in Indiana”
e3“Cercospora leaf blight ( Cercospora spp.), brown spot ( Septoria glycines Hemmi), and frogeye leaf spot ( Cercospora sojina Hara) were the most prominent foliar diseases observed in the trials”
e6“Only bixafen + flutriafol and azoxystrobin + pydiflumetofen + propiconazole significantly suppressed frogeye leaf spot severity over the nontreated control”
Claim · model-written summary
Foliar fungicide applications did not significantly increase soybean yield over the nontreated control across all site-years.
- Taxon
- soybeansGlycine maxe1
- Treatment
- Foliar fungicide applicationse7
- Outcome
- yielde7
- Direction
- increasee7
- Comparator
- nontreated controle7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Foliar diseases can significantly impact soybeans in Indiana”
e7“Foliar fungicide applications did not significantly increase yield over the nontreated control across all site-years”
Claim · model-written summary
Under low to moderate foliar disease risk, fungicide applications may not be warranted in Indiana soybean.
- Taxon
- soybeansGlycine maxe1
- Outcome
- fungicide applicationse2
- Setting
- Indianae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Foliar diseases can significantly impact soybeans in Indiana”
e2“fungicide applications may not be warranted in Indiana”
Claim · model-written summary
Growers should scout soybean fields before the beginning pod (R3) growth stage before deciding on a fungicide.
- Taxon
- soybeanGlycine maxe1
- Outcome
- scout soybean fields prior to the beginning pod (R3) growth stagee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Growers should continue to scout soybean fields prior to the beginning pod (R3) growth stage”
The same questions in other papers
azoxystrobin · Cercospora sojina · Glycine max (soybean)Positive and negative results
1 in the opposite direction
- negative
fungicide · Cercospora · Glycine max (soybean)Positive and negative results
1 in the opposite direction
- positive
fungicide · Septoria glycines · Glycine max (soybean)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- positive
fungicide · yield · Glycine max (soybean)Positive and negative results
31 papers in the same direction as this paper · 77 in the opposite direction
- positive
- positive
- positive
105 papers more in this group
See all 109 papers →application · yield · Glycine max (soybean)Positive and negative results
71 papers in the same direction as this paper · 332 in the opposite direction
- positive
- no effect
- positive
400 papers more in this group
See all 404 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.