Abstract
Abstract The recommended method of control for glyphosate-resistant (GR) Italian ryegrass in Mississippi is to apply residual herbicides in the fall; however, these treatments may negatively affect rice performance. This study was conducted to evaluate rice performance following fall-applied treatments of residual herbicides + flumioxazin at different rates. Pooled over with and without flumioxazin and herbicide rates, clomazone and dimethenamid-P caused <10% injury 28 d after emergence. Acetochlor delayed rice maturity by 2 d to clomazone, dimethenamid-P, and flumioxazin. Rice density was reduced ≥4 plants m −2 following fall-applied acetochlor and dimethenamid-P compared to nontreated plants. Rough rice yields were reduced by ≥670 kg ha −1 with fall-applied acetochlor alone and dimethenamid-P compared to nontreated plants. Acetochlor should not be used as a fall-applied treatment in areas where rice is scheduled to grow the following season. Given current label restrictions and rice injury caused by acetochlor and dimethenamid-P, clomazone remains the only viable option for controlling GR Italian ryegrass where rice is scheduled to be planted the following spring.
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Claims 9
Claim · model-written summary
Clomazone caused under 10% rice injury at 28 days.
- Taxon
- rice
Oryza sativat0 - Treatment
- clomazonee0
- Outcome
- injurye0
- Value
- <10%e0
- Qualifier
- 28 d after emergencee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“clomazone and dimethenamid-P caused <10% injury 28 d after emergence.”
t0“rice”
Claim · model-written summary
Dimethenamid-P caused under 10% rice injury at 28 days.
- Taxon
- riceOryza sativat0
- Treatment
- dimethenamid-Pe0
- Outcome
- injurye0
- Value
- <10%e0
- Qualifier
- 28 d after emergencee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“clomazone and dimethenamid-P caused <10% injury 28 d after emergence.”
t0“rice”
Claim · model-written summary
Acetochlor delayed maturity by two days relative to other herbicides.
- Taxon
- riceOryza sativae0
- Treatment
- Acetochlore0
- Outcome
- rice maturitye0
- Direction
- delayede0
- Value
- 2 de0
- Comparator
- clomazone, dimethenamid-P, and flumioxazine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Acetochlor delayed rice maturity by 2 d to clomazone, dimethenamid-P, and flumioxazin.”
Claim · model-written summary
Fall acetochlor reduced rice density by at least four plants per square meter.
- Taxon
- riceOryza sativat0
- Treatment
- fall-applied acetochlore0
- Outcome
- Rice densitye0
- Direction
- reducede0
- Value
- ≥4 plants m −2e0
- Comparator
- nontreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice density was reduced ≥4 plants m −2 following fall-applied acetochlor and dimethenamid-P compared to nontreated plants.”
t0“rice”
Claim · model-written summary
Fall dimethenamid-P reduced rice density by at least four plants per square meter.
- Taxon
- riceOryza sativat0
- Treatment
- dimethenamid-Pe0
- Outcome
- Rice densitye0
- Direction
- reducede0
- Value
- ≥4 plants m −2e0
- Comparator
- nontreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice density was reduced ≥4 plants m −2 following fall-applied acetochlor and dimethenamid-P compared to nontreated plants.”
t0“rice”
Claim · model-written summary
Fall acetochlor alone reduced rough rice yield by at least 670 kg per hectare.
- Taxon
- riceOryza sativae0
- Treatment
- fall-applied acetochlor alonee0
- Outcome
- Rough rice yieldse0
- Direction
- reducede0
- Value
- ≥670 kg ha −1e0
- Comparator
- nontreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rough rice yields were reduced by ≥670 kg ha −1 with fall-applied acetochlor alone and dimethenamid-P compared to nontreated plants.”
Claim · model-written summary
Fall dimethenamid-P reduced rough rice yield by at least 670 kg per hectare.
- Taxon
- riceOryza sativae0
- Treatment
- dimethenamid-Pe0
- Outcome
- Rough rice yieldse0
- Direction
- reducede0
- Value
- ≥670 kg ha −1e0
- Comparator
- nontreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rough rice yields were reduced by ≥670 kg ha −1 with fall-applied acetochlor alone and dimethenamid-P compared to nontreated plants.”
Claim · model-written summary
The authors advise against fall acetochlor before rice.
- Taxon
- riceOryza sativae0
- Outcome
- Acetochlor should not be used as a fall-applied treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Acetochlor should not be used as a fall-applied treatment in areas where rice is scheduled to grow the following season.”
Claim · model-written summary
The authors identify clomazone as the only viable option for controlling resistant ryegrass before rice.
- Taxon
- riceOryza sativae0
- Interactor
- GR Italian ryegrass
Lolium multiflorume0weed - Outcome
- clomazone remains the only viable option for controlling GR Italian ryegrasse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“clomazone remains the only viable option for controlling GR Italian ryegrass where rice is scheduled to be planted the following spring.”
The same questions in other papers
acetochlor · organism · Oryza sativa (rice)Positive and negative results
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acetochlor · yield · Oryza sativa (rice)Positive and negative results
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See all 9 papers →clomazone · crop injury · Oryza sativa (rice)Positive and negative results
7 papers in the same direction as this paper · 4 in the opposite direction
- positive
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See all 12 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.