Abstract
The lack of sheath blight-resistant cultivars requires rice (Oryza sativa) farmers to use fungicides to control the disease and avoid significant reductions in grain and milling yield. Sheath blight (Rhizoctonia solani) epidemics can begin over a period of weeks during the growing season, and initiation date can have significant effects on crop damage and fungicide application timing. Studies were conducted to determine how different epidemic initiation and azoxystrobin application timings affect disease development, rice yield, and milling quality. Sheath blight epidemics in field plots were initiated by inoculation at the green ring (GR), panicle differentiation (PD), early boot (EB), and late boot (LB) growth stages in 2002 to 2004. Azoxystrobin was applied to the foliage at 0.17 kg a.i. ha -1 at 7 days after PD (PD+7), midboot (B), and 50% heading (H). Inoculation significantly increased sheath blight severity and incidence and reduced yield and milling quality. There were no significant effects of inoculation timing at the GR, PD, EB, and LB growth stages. Fungicide applications made between PD+7 and H reduced sheath blight severity and incidence, resulting in higher yield and head rice milling yield compared with inoculated but nonsprayed plots.
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Claims 5
Claim · model-written summary
Inoculation increased sheath blight severity and incidence.
- Taxon
- rice
Oryza sativat0 - 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 and reduced yield and milling quality.”
t0“Rice Sheath Blight”
e1“Sheath blight (Rhizoctonia solani) epidemics”
Claim · model-written summary
Inoculation reduced rice yield and milling quality.
- Taxon
- riceOryza sativat0
- Treatment
- Inoculatione0
- Outcome
- yield and milling qualitye0
- Direction
- reducede0
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 reduced yield and milling quality.”
t0“Rice Sheath Blight”
Claim · model-written summary
Inoculation timing had no significant effect at the four growth stages.
- Taxon
- riceOryza sativat0
- Treatment
- inoculation timinge0
- Outcome
- effects of inoculation timinge0
- Direction
- no significant effectse0
- Comparator
- GR, PD, EB, and LB growth stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no significant effects of inoculation timing at the GR, PD, EB, and LB growth stages.”
t0“Rice Sheath Blight”
Claim · model-written summary
Fungicide application between PD+7 and H reduced sheath blight severity and incidence.
- Taxon
- riceOryza sativat0
- Treatment
- Fungicide applications made between PD+7 and He0
- Outcome
- sheath blight severity and incidencee0
- Direction
- reducede0
- Comparator
- inoculated but nonsprayed plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fungicide applications made between PD+7 and H reduced sheath blight severity and incidence, resulting in higher yield and head rice milling yield compared with inoculated but nonsprayed plots.”
t0“Rice Sheath Blight”
Claim · model-written summary
Fungicide application between PD+7 and H raised yield and head rice milling yield relative to inoculated nonsprayed plots.
- Taxon
- riceOryza sativat0
- Treatment
- Fungicide applications made between PD+7 and He0
- Outcome
- yield and head rice milling yielde0
- Direction
- highere0
- Comparator
- inoculated but nonsprayed plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fungicide applications made between PD+7 and H reduced sheath blight severity and incidence, resulting in higher yield and head rice milling yield compared with inoculated but nonsprayed plots.”
t0“Rice Sheath Blight”
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