Abstract
Recent outbreaks of Sclerotinia stem rot (SSR) of soybean in Ohio, along with new fungicides and cultivars with resistance to this disease, have led to a renewed interest in studies to update disease management guidelines. The effect of host resistance (in moderately resistant [MR] and moderately susceptible [MS] cultivars) and chemical control on SSR and yield was evaluated in 12 environments from 2014 to 2016. The chemical treatments evaluated were an untreated check, four fungicides (boscalid, picoxystrobin, pyraclostrobin, and thiophanate-methyl), and one herbicide (lactofen) applied at soybean growth stage R1 (early flowering) alone or at R1 followed by a second application at R2 (full flowering). SSR developed in 6 of 12 environments, with mean disease incidence in the untreated check of 2.5 to 41%. The three environments with high levels of SSR (disease incidence in the untreated check >20%) were used for further statistical analysis. There were significant effects (P < 0.05) of soybean cultivar and chemical treatment on SSR levels. Significantly lower levels of SSR were observed in MR cultivars. Both boscalid and lactofen reduced SSR but did not increase yield. Pyraclostrobin increased SSR compared with the untreated check in the three environments with high levels of disease. In the six fields where SSR did not develop, chemical treatment did not increase yield, nor was the yield from the MR cultivar significantly different from the MS cultivar. For Ohio, MR cultivars alone were effective for management of SSR in soybean fields where this disease has historically occurred.
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Claims 10
Claim · model-written summary
SSR developed in six of twelve soybean environments, with untreated incidence from 2.5 to 41%.
- Taxon
- soybean
Glycine maxt0 - Outcome
- SSRe0
- Value
- 2.5 to 41%e0
- Setting
- 12 environmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SSR developed in 6 of 12 environments, with mean disease incidence in the untreated check of 2.5 to 41%.”
t0“soybean”
Claim · model-written summary
MR soybean cultivars had significantly lower SSR levels.
- Taxon
- soybeanGlycine maxt0
- Material
- MR cultivarse0
- Outcome
- levels of SSRe0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significantly lower levels of SSR were observed in MR cultivars.”
t0“soybean”
Claim · model-written summary
boscalid reduced soybean SSR.
- Taxon
- soybeanGlycine maxt0
- Treatment
- boscalide0
- Outcome
- SSRe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both boscalid and lactofen reduced SSR but did not increase yield.”
t0“soybean”
Claim · model-written summary
boscalid did not increase soybean yield.
- Taxon
- soybeanGlycine maxt0
- Treatment
- boscalide0
- Outcome
- yielde0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both boscalid and lactofen reduced SSR but did not increase yield.”
t0“soybean”
Claim · model-written summary
lactofen reduced soybean SSR.
- Taxon
- soybeanGlycine maxt0
- Treatment
- lactofene0
- Outcome
- SSRe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both boscalid and lactofen reduced SSR but did not increase yield.”
t0“soybean”
Claim · model-written summary
lactofen did not increase soybean yield.
- Taxon
- soybeanGlycine maxt0
- Treatment
- lactofene0
- Outcome
- yielde0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both boscalid and lactofen reduced SSR but did not increase yield.”
t0“soybean”
Claim · model-written summary
Pyraclostrobin increased soybean SSR versus untreated check in high disease environments.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Pyraclostrobine0
- Outcome
- SSRe0
- Direction
- increasede0
- Qualifier
- three environments with high levels of diseasee0
- Comparator
- untreated checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pyraclostrobin increased SSR compared with the untreated check in the three environments with high levels of disease.”
t0“soybean”
Claim · model-written summary
Chemical treatment did not increase soybean yield in six fields without SSR.
- Taxon
- soybeanGlycine maxt0
- Treatment
- chemical treatmente0
- Outcome
- yielde0
- Direction
- did not increasee0
- Qualifier
- six fields where SSR did not develope0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the six fields where SSR did not develop, chemical treatment did not increase yield, nor was the yield from the MR cultivar significantly different from the MS cultivar.”
t0“soybean”
Claim · model-written summary
Yield of MR and MS soybean cultivars was not significantly different in fields without SSR.
- Taxon
- soybeanGlycine maxt0
- Material
- MR cultivare0
- Outcome
- yielde0
- Direction
- significantly differente0
- Comparator
- MS cultivare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the six fields where SSR did not develop, chemical treatment did not increase yield, nor was the yield from the MR cultivar significantly different from the MS cultivar.”
t0“soybean”
Claim · model-written summary
For Ohio soybean fields with historical SSR, MR cultivars alone were effective for disease management.
- Taxon
- soybeanGlycine maxt0
- Material
- MR cultivarse0
- Outcome
- MR cultivars alone were effective for management of SSRe0
- Setting
- Ohioe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For Ohio, MR cultivars alone were effective for management of SSR in soybean fields where this disease has historically occurred.”
t0“soybean”
The same questions in other papers
pyraclostrobin · disease · Glycine max (soybean)Positive and negative results
6 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 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.