Abstract
Abstract Acetochlor (WSSA Group 15) is a very-long-chain fatty acid–inhibiting herbicide used to control grass weed species in row crops and could potentially be effective when used in a rice herbicide program. A field study was conducted in 2016 and 2017 at four locations to determine the effects of acetochlor formulation and rate on rice tolerance. Overall, rice was more tolerant to the microencapsulated (ME) formulation of acetochlor than to the emulsifiable concentrate (EC) formulation, likely because of the potential for immediate absorption of acetochlor from the EC formulation following rainfall. Differences in rainfall among experimental sites and years caused variation in acetochlor activation and influenced crop injury. In all environments, PRE applications of either formulation resulted in the greatest injury at 2 WAT (61%), while injury following delayed PRE (DPRE) or early POST (EPOST) applications averaged 30% and 16%, respectively. When ME acetochlor was applied EPOST, rough rice yield was 97% of nontreated rice or 9,020 kg ha −1 , indicating that applications should be delayed until this stage to minimize crop damage and maximize yield.
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Claims 7
Claim · model-written summary
Rice tolerated microencapsulated acetochlor better than emulsifiable concentrate.
- Taxon
- rice
Oryza sativae0 - Treatment
- microencapsulated (ME) formulation of acetochlore0
- Outcome
- tolerante0
- Direction
- more tolerante0
- Comparator
- emulsifiable concentrate (EC) formulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice was more tolerant to the microencapsulated (ME) formulation of acetochlor than to the emulsifiable concentrate (EC) formulation”
Claim · model-written summary
Rainfall variation across sites and years influenced acetochlor activation and crop injury.
Not reportedTaxonDirection
Verbatim
e0“Differences in rainfall among experimental sites and years caused variation in acetochlor activation and influenced crop injury.”
Claim · model-written summary
Preemergence acetochlor caused the greatest rice injury at two weeks after treatment, 61%.
- Treatment
- PRE applications of either formulatione0
- Outcome
- injurye0
- Direction
- greateste0
- Value
- 61%e0
- Qualifier
- 2 WATe0
Not reportedTaxonComparator
Verbatim
e0“PRE applications of either formulation resulted in the greatest injury at 2 WAT (61%)”
Claim · model-written summary
Delayed preemergence acetochlor applications caused 30% average rice injury.
Not reportedTaxonComparatorDirection
Verbatim
e0“injury following delayed PRE (DPRE) or early POST (EPOST) applications averaged 30% and 16%, respectively”
Claim · model-written summary
Early postemergence acetochlor applications caused 16% average rice injury.
Not reportedTaxonComparatorDirection
Verbatim
e0“injury following delayed PRE (DPRE) or early POST (EPOST) applications averaged 30% and 16%, respectively”
Claim · model-written summary
Early postemergence microencapsulated acetochlor gave rough rice yield of 97% of nontreated rice, or 9,020 kg ha −1.
- Taxon
- riceOryza sativae0
- Treatment
- ME acetochlor was applied EPOSTe0
- Outcome
- rough rice yielde0
- Value
- 9,020 kg ha −1e0
- Qualifier
- 97%e0
- Comparator
- nontreated ricee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When ME acetochlor was applied EPOST, rough rice yield was 97% of nontreated rice or 9,020 kg ha −1”
Claim · model-written summary
The authors recommend delaying acetochlor application to early postemergence to reduce damage and maximize rice yield.
- Outcome
- applications should be delayed until this stagee0
Not reportedTaxon
Verbatim
e0“applications should be delayed until this stage to minimize crop damage and maximize yield”
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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.