Abstract
Abstract Rice producers in the United States need effective herbicides to control problematic weeds. Previous research has demonstrated that acetochlor can provide in-season weed control in rice; however, undesirable injury is common. Thus, trials were initiated in 2020 and 2021 to evaluate 1) rice cultivar tolerance to microencapsulated (ME) acetochlor with the use of a fenclorim seed treatment at 2.5 g ai kg −1 of seed; 2) a dose-response of a fenclorim seed treatment with ME acetochlor; and 3) rice tolerance to fenclorim and ME acetochlor under cool, wet conditions. For all trials, acetochlor was applied delayed-preemergence (4 to 7 d after planting). In the dose-response trials and in the presence of acetochlor, the fenclorim seed treatment rate of 2.5 g ai kg −1 reduced rice injury and increased rice plant heights and shoot numbers relative to acetochlor without fenclorim, and plant heights and shoot numbers were comparable to those of the nontreated control in all evaluations. In the cultivar screening, 14 of 16 cultivars exhibited <20% injury with acetochlor at 1,260 g ai ha −1 and fenclorim at 2.5 g ai kg −1 2 wk after emergence (WAE) at the Pine Tree Research Station (PTRS). At the Rice Research and Extension Center (RREC) 2 and 4 WAE and at PTRS 4 WAE, all cultivars exhibited <20% injury with acetochlor and fenclorim. The fenclorim seed treatment in the presence of acetochlor provided comparable rice plant height, shoot numbers, groundcover, and rough rice yield to that of the nontreated control. Under cool, wet conditions, rice injury without fenclorim ranged from 15% to 60% with acetochlor at 1,050 g ai ha −1 , whereas injury from acetochlor with the fenclorim seed treatment ranged from 0% to 20%. Based on the results of these experiments, the fenclorim seed treatment appears to safen an assortment of rice cultivars from injury caused by ME acetochlor.
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Claims 10
Claim · model-written summary
Fenclorim at 2.5 g ai kg −1 reduced acetochlor injury.
- Taxon
- Rice
Oryza sativat0 - Treatment
- fenclorim seed treatment rate of 2.5 g ai kg −1e1
- Outcome
- rice injurye1
- Direction
- reducede1
- Comparator
- acetochlor without fenclorime2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice tolerance to acetochlor with a fenclorim seed treatment”
e1“fenclorim seed treatment rate of 2.5 g ai kg −1 reduced rice injury”
e2“relative to acetochlor without fenclorim”
Claim · model-written summary
Fenclorim increased rice plant heights and shoot numbers relative to acetochlor alone.
- Taxon
- RiceOryza sativat0
- Treatment
- fenclorim seed treatment rate of 2.5 g ai kg −1e1
- Outcome
- rice plant heights and shoot numberse1
- Direction
- increasede1
- Comparator
- acetochlor without fenclorime1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice tolerance to acetochlor with a fenclorim seed treatment”
e1“fenclorim seed treatment rate of 2.5 g ai kg −1 reduced rice injury and increased rice plant heights and shoot numbers relative to acetochlor without fenclorim”
Claim · model-written summary
Plant heights and shoot numbers with fenclorim were comparable to untreated controls.
- Taxon
- RiceOryza sativat0
- Outcome
- plant heights and shoot numberse1
- Direction
- comparablee1
- Comparator
- nontreated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice tolerance to acetochlor with a fenclorim seed treatment”
e1“plant heights and shoot numbers were comparable to those of the nontreated control in all evaluations”
Claim · model-written summary
Fourteen of 16 cultivars had under 20% injury at PTRS at two weeks.
- Taxon
- RiceOryza sativat0
- Material
- cultivarse1
- Outcome
- injurye1
- Value
- <20%e1
- Qualifier
- 14 of 16 cultivarse1
- Setting
- Pine Tree Research Station (PTRS)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice tolerance to acetochlor with a fenclorim seed treatment”
e1“14 of 16 cultivars exhibited <20% injury with acetochlor at 1,260 g ai ha −1 and fenclorim at 2.5 g ai kg −1 2 wk after emergence (WAE) at the Pine Tree Research Station (PTRS)”
Claim · model-written summary
All cultivars had under 20% injury at RREC two and four weeks and PTRS four weeks.
- Taxon
- RiceOryza sativat0
- Material
- cultivarse1
- Outcome
- injurye1
- Value
- <20%e1
- Setting
- Rice Research and Extension Center (RREC)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice tolerance to acetochlor with a fenclorim seed treatment”
e1“At the Rice Research and Extension Center (RREC) 2 and 4 WAE and at PTRS 4 WAE, all cultivars exhibited <20% injury with acetochlor and fenclorim”
Claim · model-written summary
Fenclorim with acetochlor gave plant height, shoot numbers, and groundcover comparable to untreated controls.
- Taxon
- RiceOryza sativat0
- Outcome
- rice plant height, shoot numbers, groundcovere1
- Direction
- comparablee1
- Comparator
- nontreated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice tolerance to acetochlor with a fenclorim seed treatment”
e1“fenclorim seed treatment in the presence of acetochlor provided comparable rice plant height, shoot numbers, groundcover, and rough rice yield to that of the nontreated control”
Claim · model-written summary
Fenclorim with acetochlor gave rough rice yield comparable to untreated controls.
- Taxon
- RiceOryza sativat0
- Outcome
- rough rice yielde1
- Direction
- comparablee1
- Comparator
- nontreated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice tolerance to acetochlor with a fenclorim seed treatment”
e1“fenclorim seed treatment in the presence of acetochlor provided comparable rice plant height, shoot numbers, groundcover, and rough rice yield to that of the nontreated control”
Claim · model-written summary
Under cool, wet conditions, injury without fenclorim ranged from 15% to 60%.
- Taxon
- RiceOryza sativat0
- Outcome
- rice injurye1
- Value
- 15% to 60%e1
- Qualifier
- Under cool, wet conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice tolerance to acetochlor with a fenclorim seed treatment”
e1“Under cool, wet conditions, rice injury without fenclorim ranged from 15% to 60% with acetochlor at 1,050 g ai ha −1”
Claim · model-written summary
Under cool, wet conditions, injury with fenclorim ranged from 0% to 20%.
- Taxon
- RiceOryza sativat0
- Outcome
- injurye1
- Value
- 0% to 20%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice tolerance to acetochlor with a fenclorim seed treatment”
e1“injury from acetochlor with the fenclorim seed treatment ranged from 0% to 20%”
Claim · model-written summary
The authors conclude that fenclorim appears to protect rice cultivars from ME acetochlor injury.
- Taxon
- RiceOryza sativat0
- Outcome
- safen an assortment of rice cultivars from injury caused by ME acetochlore1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice tolerance to acetochlor with a fenclorim seed treatment”
e1“fenclorim seed treatment appears to safen an assortment of rice cultivars from injury caused by ME acetochlor”
The same questions in other papers
Fenclorim · crop injury · Oryza sativa (rice)Results agree
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- positive
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- no effect
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See all 15 papers →seed treatment · crop injury · Oryza sativa (rice)Results agree
6 papers in the same direction as this paper
- positive
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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.