Abstract
ABSTRACT Losses due to soybean anthracnose, caused by Colletotrichum truncatum, have not been systematically quantified in the field, and the efficacy of chemical control of this disease is not known. This study shows an estimate of losses associated with the disease in soybean crops in the north of the country. Two trials with cv. M9144 RR were carried out in commercial fields in Tocantins State in the 2010/2011 and 2011/2012 growing seasons, in randomized blocks, with four replicates. Foliar applications were performed on plants at R1/R2 and R5.2 stages, employing CO2-pressurized equipment and application volume of 200 L ha-1. Nine fungicides and one untreated control were compared, and the disease gradients in the two seasons were obtained. The percentage of infected pods was calculated at the R6 stage. Grain yield ranged from 3,288 to 3,708 kg/ha in the untreated plots in 2010/2011 and 2011/2012, respectively, and from 3,282 to 4,110 kg/ha in the treated plots. In the 2010/2011 season, only azoxystrobin + cyproconazole significantly reduced the disease incidence, compared to untreated control plots, not differing from the remaining treatments. In the 2011/2012 season, there were no significant differences between treated and untreated plots. Highly significant correlations (p < 0.01) were found between yield and soybean anthracnose incidence on pods in both years (r = -0.85). For each 1% increment in the disease incidence, c. 90 kg/ha of soybean grain were lost. The current study determined that significant losses due to anthracnose occur in commercial crops in the north of the country and highlighted the limitation of chemical control as anthracnose management method.
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Claims 7
Claim · model-written summary
Untreated soybean grain yield ranged from 3,288 to 3,708 kg/ha across the two seasons.
- Taxon
- soybean
Glycine maxt0 - Outcome
- Grain yielde0
- Value
- 3,288 to 3,708 kg/hae0
- Qualifier
- untreated plotse0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield ranged from 3,288 to 3,708 kg/ha in the untreated plots in 2010/2011 and 2011/2012, respectively”
t0“yield of soybean”
Claim · model-written summary
Treated soybean grain yield ranged from 3,282 to 4,110 kg/ha.
- Taxon
- soybeanGlycine maxt0
- Outcome
- Grain yielde0
- Value
- 3,282 to 4,110 kg/hae0
- Qualifier
- treated plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield ranged from 3,288 to 3,708 kg/ha in the untreated plots in 2010/2011 and 2011/2012, respectively, and from 3,282 to 4,110 kg/ha in the treated plots”
t0“yield of soybean”
Claim · model-written summary
Azoxystrobin plus cyproconazole significantly reduced soybean anthracnose incidence relative to untreated plots in 2010/2011.
- Taxon
- soybeanGlycine maxt0
- Treatment
- azoxystrobin + cyproconazolee0
- Interactor
- anthracnoset0pathogen
- Outcome
- disease incidencee0
- Direction
- reducede0
- Comparator
- untreated control plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the 2010/2011 season, only azoxystrobin + cyproconazole significantly reduced the disease incidence, compared to untreated control plots”
t0“anthracnose on the yield of soybean”
Claim · model-written summary
Treated and untreated plots did not differ significantly in 2011/2012.
- Taxon
- soybeanGlycine maxt0
- Treatment
- treatede0
- Outcome
- differencese0
- Direction
- no significant differencese0
- Comparator
- untreated plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the 2011/2012 season, there were no significant differences between treated and untreated plots”
t0“anthracnose on the yield of soybean”
Claim · model-written summary
Yield and soybean anthracnose incidence on pods were negatively correlated in both years (r = -0.85).
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- podse0
- Interactor
- anthracnosee0pathogen
- Outcome
- yielde0
- Value
- r = -0.85e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highly significant correlations (p < 0.01) were found between yield and soybean anthracnose incidence on pods in both years (r = -0.85)”
Claim · model-written summary
Each 1% increase in disease incidence corresponded to approximately 90 kg/ha of soybean grain lost.
- Taxon
- soybeanGlycine maxe0
- Interactor
- anthracnoset0pathogen
- Outcome
- soybean graine0
- Direction
- loste0
- Value
- c. 90 kg/hae0
- Qualifier
- 1% increment in the disease incidencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For each 1% increment in the disease incidence, c. 90 kg/ha of soybean grain were lost”
t0“anthracnose on the yield of soybean”
Claim · model-written summary
The authors found substantial anthracnose losses and limited chemical control in northern commercial soybean crops.
- Taxon
- soybeanGlycine maxt0
- Interactor
- anthracnosee0pathogen
- Outcome
- significant losses due to anthracnosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant losses due to anthracnose occur in commercial crops in the north of the country and highlighted the limitation of chemical control as anthracnose management method”
t0“yield of soybean”
The same questions in other papers
cyproconazole · disease · Glycine max (soybean)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
azoxystrobin · disease · Glycine max (soybean)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- 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.