Abstract
Abstract Hophornbeam copperleaf ( Acalypha ostraefolia Ridd), an increasing weed problem in peanuts ( Arachis hypogaea L.) in the southwestern United States, is resistant to most presently used herbicides. Research was conducted to design and evaluate production systems that would provide full season control of this weed in peanuts. Screening experiments indicated several herbicides would control copperleaf but that they were not selective for peanuts. Preliminary systems utilizing alachlor (2‐chloro‐2',6'‐diethyl‐N‐(methoxymethyl)acetanilide) at 2.24 kg/ha combined with rotary cultivation provided early but not full season control. Ultimately systems involving a preplant herbicide, alachlor or fluorodifen (p‐nitrophenyl α,α,α‐trifluoro 2‐nitro‐p‐totyl ether) either preemergence or with several postemergence combinations, and timely cultivations were developed that controlled copperleaf for the entire growing season. Fluorodifen combinations (at 5 kg/ha) applied postemergence to peanuts and copperleaf up to 7.5 cm tall provided excellent weed control with no visible crop injury.
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Claims 5
Claim · model-written summary
Several screened herbicides controlled copperleaf but were not selective for peanuts.
- Taxon
- peanuts
Arachis hypogaeae0 - Treatment
- several herbicidese0
- Interactor
- copperleafe0weed
- Outcome
- control copperleafe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Screening experiments indicated several herbicides would control copperleaf but that they were not selective for peanuts.”
Claim · model-written summary
Alachlor with rotary cultivation controlled copperleaf early but not for the full season.
- Taxon
- peanutsArachis hypogaeat0
- Treatment
- alachlor (2‐chloro‐2',6'‐diethyl‐N‐(methoxymethyl)acetanilide) at 2.24 kg/ha combined with rotary cultivatione0
- Interactor
- copperleaft0weed
- Outcome
- controle0
- Qualifier
- early but not full seasone0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Preliminary systems utilizing alachlor (2‐chloro‐2',6'‐diethyl‐N‐(methoxymethyl)acetanilide) at 2.24 kg/ha combined with rotary cultivation provided early but not full season control.”
t0“Weed Control Systems for Hophornbeam Copperleaf Control in Peanuts1”
Claim · model-written summary
Systems using a preplant herbicide, preemergence or postemergence alachlor or fluorodifen, and timely cultivation controlled copperleaf all season.
- Taxon
- peanutsArachis hypogaeat0
- Treatment
- systems involving a preplant herbicide, alachlor or fluorodifene0
- Interactor
- copperleafe0weed
- Outcome
- controlled copperleafe0
- Qualifier
- entire growing seasone0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ultimately systems involving a preplant herbicide, alachlor or fluorodifen (p‐nitrophenyl α,α,α‐trifluoro 2‐nitro‐p‐totyl ether) either preemergence or with several postemergence combinations, and timely cultivations were developed that controlled copperleaf for the entire growing season.”
t0“Weed Control Systems for Hophornbeam Copperleaf Control in Peanuts1”
Claim · model-written summary
Postemergence fluorodifen combinations provided excellent weed control.
- Taxon
- peanutsArachis hypogaeae0
- Treatment
- Fluorodifen combinations (at 5 kg/ha)e0
- Interactor
- copperleafe0weed
- Outcome
- weed controle0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fluorodifen combinations (at 5 kg/ha) applied postemergence to peanuts and copperleaf up to 7.5 cm tall provided excellent weed control with no visible crop injury.”
Claim · model-written summary
Postemergence fluorodifen combinations caused no visible crop injury.
- Taxon
- peanutsArachis hypogaeae0
- Treatment
- Fluorodifen combinations (at 5 kg/ha)e0
- Interactor
- copperleafe0weed
- Outcome
- crop injurye0
- Direction
- no visiblee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fluorodifen combinations (at 5 kg/ha) applied postemergence to peanuts and copperleaf up to 7.5 cm tall provided excellent weed control with no visible crop injury.”
The same questions in other papers
Fluorodifen · weed · Arachis hypogaea (peanut)Results agree
1 paper in the same direction as this paper
- positive
alachlor · control · Arachis hypogaea (peanut)Results agree
2 papers in the same direction as this paper
- positive
- positive
herbicide · control · Arachis hypogaea (peanut)Positive and negative results
32 papers in the same direction as this paper · 4 in the opposite direction
- negative
- no effect
- negative
33 papers more in this group
See all 37 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.