Abstract
The development of sheath blight (Rhizoctonia solani)-resistant rice (Oryza sativa) cultivars will allow producers to use less fungicide and to avoid significant reductions in grain and milling yields. Among cultivars currently in cultivation in the southern United States rice-producing region, sheath blight resistance levels range from very susceptible to moderately susceptible. A study was conducted to determine the response of cultivars with different levels of susceptibility to sheath blight inoculations and fungicide applications and to determine the impact of sheath blight disease development on rice yield and quality. Sheath blight epidemics in field plots were initiated by inoculation at the panicle differentiation growth stage from 2003 through 2005. Azoxystrobin at 0.17 kg a.i. ha –1 and flutolanil at 0.56 kg a.i. ha –1 were applied in sequential applications at midboot and 50 to 70% heading. Inoculation significantly increased sheath blight severity and incidence and caused yield losses of 4% in moderately susceptible cv. Francis to 21% in very susceptible cv. Cocodrie. Milling yield was affected to a lesser extent. Fungicide treatments reduced sheath blight incidence and severity regardless of cultivar. Azoxystrobin was more effective than flutolanil in minimizing yield loss due to sheath blight in all cultivars except Francis.
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Claims 7
Claim · model-written summary
Cultivated southern United States rice cultivars range from very to moderately susceptible to sheath blight.
- Taxon
- Rice
Oryza sativat0 - Outcome
- sheath blight resistance levelse0
- Setting
- southern United States rice-producing regione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among cultivars currently in cultivation in the southern United States rice-producing region, sheath blight resistance levels range from very susceptible to moderately susceptible.”
t0“Rice”
Claim · model-written summary
Inoculation significantly increased rice sheath blight severity and incidence.
- Taxon
- riceOryza sativae1
- Treatment
- Inoculatione0
- Interactor
- Rhizoctonia solani
Rhizoctonia solanie1pathogen - Outcome
- sheath blight severity and incidencee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation significantly increased sheath blight severity and incidence”
e1“sheath blight (Rhizoctonia solani)-resistant rice (Oryza sativa)”
Claim · model-written summary
Inoculation caused a 4% yield loss in moderately susceptible Francis rice.
- Taxon
- RiceOryza sativat0
- Material
- cv. Francise0
- Treatment
- Inoculatione0
- Interactor
- Sheath Blightt0pathogen
- Outcome
- yield lossese0
- Direction
- lossese0
- Value
- 4%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation significantly increased sheath blight severity and incidence and caused yield losses of 4% in moderately susceptible cv. Francis to 21% in very susceptible cv. Cocodrie.”
t0“Rice Sheath Blight”
Claim · model-written summary
Inoculation caused a 21% yield loss in very susceptible Cocodrie rice.
- Taxon
- RiceOryza sativat0
- Material
- cv. Cocodriee0
- Treatment
- Inoculatione0
- Interactor
- Sheath Blightt0pathogen
- Outcome
- yield lossese0
- Direction
- lossese0
- Value
- 21%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation significantly increased sheath blight severity and incidence and caused yield losses of 4% in moderately susceptible cv. Francis to 21% in very susceptible cv. Cocodrie.”
t0“Rice Sheath Blight”
Claim · model-written summary
Sheath blight affected rice milling yield less than grain yield.
- Taxon
- RiceOryza sativat0
- Interactor
- Sheath Blightt0pathogen
- Outcome
- Milling yielde0
- Direction
- lesser extente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Milling yield was affected to a lesser extent.”
t0“Rice Sheath Blight, Yield, and Quality”
Claim · model-written summary
Fungicides reduced sheath blight incidence and severity regardless of rice cultivar.
- Taxon
- RiceOryza sativat0
- Treatment
- Fungicide treatmentse0
- Interactor
- sheath blighte0pathogen
- Outcome
- sheath blight incidence and severitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fungicide treatments reduced sheath blight incidence and severity regardless of cultivar.”
t0“Rice”
Claim · model-written summary
Azoxystrobin minimized sheath blight yield loss more effectively than flutolanil in all rice cultivars except Francis.
- Taxon
- RiceOryza sativat0
- Treatment
- Azoxystrobine0
- Interactor
- sheath blighte0pathogen
- Outcome
- yield loss due to sheath blighte0
- Direction
- more effectivee0
- Qualifier
- except Francise0
- Comparator
- flutolanile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Azoxystrobin was more effective than flutolanil in minimizing yield loss due to sheath blight in all cultivars except Francis.”
t0“Rice”
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See all 418 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.