Abstract
Lack of sheath blight resistant varieties requires rice (Oryza sativa) farmers to use fungicides to avoid significant reductions in grain yield and milling yield. Studies were conducted to determine the best rate and rice growth stage for a single application of azoxystrobin, a fungicide recently labeled for this use, to effectively control sheath blight. Azoxystrobin was applied foliarly to inoculated field plots in 2000 to 2002 using rates of 0.22, 0.17, and 0.11 kg a.i. ha -1 at 7 days after panicle differentiation (PD+7), boot (B), and heading (H) growth stages and at 0.17 kg a.i. ha -1 at 5, 10, and 15 days after heading. Sheath blight severity (measured on a 0 to 9 scale) and incidence (percent tillers infected) were assessed 1 to 2 weeks before harvest. A fungicide application made between PD+7 and H significantly reduced sheath blight severity, which resulted in significantly higher yield and head rice milling yield compared with inoculated unsprayed plots. There were no significant effects of fungicide rate at the PD+7, B, and H growth stages. Fungicide-treated plots had yield and milling yield similar to the very lightly diseased, uninoculated check plots included for comparison. With fungicide application made postheading, rice had higher disease severity, resulting in lower yields and milling yield compared with rice receiving earlier applications.
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Claims 8
Claim · model-written summary
Azoxystrobin from PD+7 through heading reduced sheath blight severity against unsprayed inoculated plots.
- Taxon
- Rice
Oryza sativat0 - Treatment
- fungicide application made between PD+7 and He0
- Outcome
- sheath blight severitye0
- Direction
- reducede0
- Comparator
- inoculated unsprayed plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A fungicide application made between PD+7 and H significantly reduced sheath blight severity, which resulted in significantly higher yield and head rice milling yield compared with inoculated unsprayed plots”
t0“Azoxystrobin Rate and Timing Effects on Rice”
Claim · model-written summary
Azoxystrobin from PD+7 through heading raised rice yield relative to unsprayed inoculated plots.
- Taxon
- RiceOryza sativat0
- Treatment
- fungicide application made between PD+7 and He0
- Outcome
- yielde0
- Direction
- highere0
- Comparator
- inoculated unsprayed plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A fungicide application made between PD+7 and H significantly reduced sheath blight severity, which resulted in significantly higher yield and head rice milling yield compared with inoculated unsprayed plots”
t0“Azoxystrobin Rate and Timing Effects on Rice”
Claim · model-written summary
Azoxystrobin from PD+7 through heading raised head rice milling yield relative to unsprayed inoculated plots.
- Taxon
- riceOryza sativae0
- Treatment
- fungicide application made between PD+7 and He0
- Outcome
- head rice milling yielde0
- Direction
- highere0
- Comparator
- inoculated unsprayed plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A fungicide application made between PD+7 and H significantly reduced sheath blight severity, which resulted in significantly higher yield and head rice milling yield compared with inoculated unsprayed plots”
Claim · model-written summary
Fungicide rate had no significant effect at PD+7, boot and heading.
- Taxon
- RiceOryza sativat0
- Treatment
- fungicide ratee0
- Outcome
- effectse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Azoxystrobin Rate and Timing Effects on Rice”
e0“There were no significant effects of fungicide rate at the PD+7, B, and H growth stages”
Claim · model-written summary
Fungicide-treated plots had rice yield similar to lightly diseased uninoculated checks.
- Taxon
- RiceOryza sativat0
- Treatment
- Fungicide-treated plotse0
- Outcome
- yield and milling yielde0
- Direction
- similare0
- Comparator
- uninoculated check plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Azoxystrobin Rate and Timing Effects on Rice”
e0“Fungicide-treated plots had yield and milling yield similar to the very lightly diseased, uninoculated check plots included for comparison”
Claim · model-written summary
Postheading fungicide application produced higher rice sheath blight severity than earlier application.
- Taxon
- riceOryza sativae0
- Treatment
- fungicide application made postheadinge0
- Outcome
- disease severitye0
- Direction
- highere0
- Comparator
- rice receiving earlier applicationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With fungicide application made postheading, rice had higher disease severity, resulting in lower yields and milling yield compared with rice receiving earlier applications”
Claim · model-written summary
Postheading fungicide application produced lower rice yield than earlier application.
- Taxon
- riceOryza sativae0
- Treatment
- fungicide application made postheadinge0
- Outcome
- yieldse0
- Direction
- lowere0
- Comparator
- rice receiving earlier applicationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With fungicide application made postheading, rice had higher disease severity, resulting in lower yields and milling yield compared with rice receiving earlier applications”
Claim · model-written summary
Postheading fungicide application produced lower rice milling yield than earlier application.
- Taxon
- riceOryza sativae0
- Treatment
- fungicide application made postheadinge0
- Outcome
- milling yielde0
- Direction
- lowere0
- Comparator
- rice receiving earlier applicationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With fungicide application made postheading, rice had higher disease severity, resulting in lower yields and milling yield compared with rice receiving earlier applications”
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See all 6 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.