Abstract
Gray leaf spot (Cercospora zeae-maydis) is a foliar disease of corn (Zea mays) that consistently reduces yields across the United States and is an annual concern in Indiana corn production. Field trials were conducted in West Lafayette, IN, over 3 years (2016 to 2018) to evaluate the effectiveness of 12-leaf collar stage (V12) foliar fungicide applications compared with tasseling (VT) applications for gray leaf spot management and yield. Results indicated that during years in which foliar disease severity was less than 4%, there was no effect of application timing on gray leaf spot severity. In 2018, when gray leaf spot levels exceeded 5%, significantly less disease was observed in treatments receiving VT applications compared with V12 applications. Application timing did not affect yield in any year of the experiment. In 2016, benzovindiflupyr + azoxystrobin + propiconazole resulted in greater yields compared with the nontreated control, and in 2018, pyraclostrobin + metconazole and benzovindiflupyr + azoxystrobin + propiconazole resulted in greater yields compared with the nontreated control. This research indicates that in high disease pressure environments and years, Indiana farmers may want to continue to apply fungicides at VT rather than apply prior to tassel.
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Claims 7
Claim · model-written summary
At less than 4% foliar disease severity, fungicide application timing (V12 versus VT) had no effect on gray leaf spot severity.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- 12-leaf collar stage (V12) foliar fungicide applicationse2
- Interactor
- Cercospora zeae-maydis
Cercospora zeae-maydise0pathogen - Outcome
- gray leaf spot severitye1
- Direction
- no effecte1
- Qualifier
- foliar disease severity was less than 4%e1
- Comparator
- tasseling (VT) applicationse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gray leaf spot (Cercospora zeae-maydis) is a foliar disease of corn (Zea mays)”
e1“Results indicated that during years in which foliar disease severity was less than 4%, there was no effect of application timing on gray leaf spot severity”
e2“to evaluate the effectiveness of 12-leaf collar stage (V12) foliar fungicide applications compared with tasseling (VT) applications for gray leaf spot management and yield”
Claim · model-written summary
In 2018, when gray leaf spot exceeded 5%, VT applications gave significantly less disease than V12 applications.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- VT applicationse3
- Outcome
- diseasee3
- Direction
- lesse3
- Qualifier
- In 2018, when gray leaf spot levels exceeded 5%e3
- Comparator
- V12 applicationse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gray leaf spot (Cercospora zeae-maydis) is a foliar disease of corn (Zea mays)”
e3“In 2018, when gray leaf spot levels exceeded 5%, significantly less disease was observed in treatments receiving VT applications compared with V12 applications”
Claim · model-written summary
Application timing did not affect corn yield in any year.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Application timinge4
- Outcome
- yielde4
- Direction
- no_changeinferrede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gray leaf spot (Cercospora zeae-maydis) is a foliar disease of corn (Zea mays)”
e4“Application timing did not affect yield in any year of the experiment”
Claim · model-written summary
In 2016, benzovindiflupyr + azoxystrobin + propiconazole gave greater yields than the nontreated control.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- benzovindiflupyr + azoxystrobin + propiconazolee5
- Outcome
- yieldse5
- Direction
- greatere5
- Qualifier
- In 2016e5
- Comparator
- nontreated controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gray leaf spot (Cercospora zeae-maydis) is a foliar disease of corn (Zea mays)”
e5“In 2016, benzovindiflupyr + azoxystrobin + propiconazole resulted in greater yields compared with the nontreated control”
Claim · model-written summary
In 2018, pyraclostrobin + metconazole gave greater yields than the nontreated control.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- pyraclostrobin + metconazolee6
- Outcome
- yieldse6
- Direction
- greatere6
- Qualifier
- in 2018e6
- Comparator
- nontreated controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gray leaf spot (Cercospora zeae-maydis) is a foliar disease of corn (Zea mays)”
e6“in 2018, pyraclostrobin + metconazole and benzovindiflupyr + azoxystrobin + propiconazole resulted in greater yields compared with the nontreated control”
Claim · model-written summary
In 2018, benzovindiflupyr + azoxystrobin + propiconazole gave greater yields than the nontreated control.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- benzovindiflupyr + azoxystrobin + propiconazolee6
- Outcome
- yieldse6
- Direction
- greatere6
- Qualifier
- in 2018e6
- Comparator
- nontreated controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gray leaf spot (Cercospora zeae-maydis) is a foliar disease of corn (Zea mays)”
e6“in 2018, pyraclostrobin + metconazole and benzovindiflupyr + azoxystrobin + propiconazole resulted in greater yields compared with the nontreated control”
Claim · model-written summary
Indiana farmers may continue to apply fungicides at VT rather than before tassel in high disease pressure years.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- continue to apply fungicides at VTe7
- Qualifier
- in high disease pressure environments and yearse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gray leaf spot (Cercospora zeae-maydis) is a foliar disease of corn (Zea mays)”
e7“in high disease pressure environments and years, Indiana farmers may want to continue to apply fungicides at VT rather than apply prior to tassel”
The same questions in other papers
pyraclostrobin · yield · Zea mays (maize)Results differ
4 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
2 papers more in this group
See all 6 papers →azoxystrobin · yield · Zea mays (maize)Positive and negative results
10 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
8 papers more in this group
See all 12 papers →propiconazole · yield · Zea mays (maize)Results agree
9 papers in the same direction as this paper
- positive
- positive
- positive
6 papers more in this group
See all 10 papers →application · Cercospora zeae-maydis · Zea mays (maize)Positive and negative results
2 in the opposite direction
- positive
- positive
fungicide · Cercospora zeae-maydis · Zea mays (maize)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
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.