Abstract
Abstract Presently there are no herbicides cleared for weed control in arrowleaf clover ( Trifolium vesiculosum Savi.) a proven legume for pasture mixtures in the sunbelt. The objective of the study was to determine the selectiveness of 2,4‐DB [4‐(2,4dichlorophenoxy)butyric acid], 2,4‐D [ (24dichlorophenoxy)acetic acid], bromoxynil [3,5dibromo‐4‐hydroxbenzonitrile], MCPA [((4‐chloro‐ o ‐to1yl)oxy) acetic acid], and dicamba [3,6dichloro‐oanistic acid] for the control of various broadleaf weeds in arrowleaf clover. Field studies were conducted at three locations. Soil classification for these location are: Aquic Paleudolls for location I, Ultic Haplustalfs for location II, and Mollis Albaqualfs for location III. At all three locations the herbicides were applied postemergence to actively growing arrowleaf plants (5 to 15 cm in height) in late March or early April. Visual damage to arrowleaf clover and weeds was estimated after several weeks. Forage production from the various treatments was determined from June samplings and seed production of arrowleaf was determined from July samplings. Of the herbicides evaluated, 2,4DB at 0.56 kg/ha was consistently selective to arrowleaf clover and adequately controlled the broadleaf weeds including seed stalk formation of curly dock ( Rumex crispus L.). MCPA at 0.56 kg/ha also controlled the broadleaf weeds but was not consistently selective on arrowleaf clover. The 0.56 kg/ha rate of 2,4‐D also controlled the broadleaf weeds and significantly reduced the forage production of arrowleaf clover. Seed production with the 2,4‐D treatment (0.56 kg/ha rate) was not suppressed as much as forage production and the decrease was only significant at one location. A combination of 2,4D and banvel (0.42 and 0.14 kg/ha respectively) severely damaged the arrowleaf and could be used as a treatment to control arrowleaf clover.
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Claims 9
Claim · model-written summary
2,4DB at 0.56 kg/ha was consistently selective for arrowleaf clover.
- Taxon
- arrowleaf clovere0
- Treatment
- 2,4DB at 0.56 kg/hae0
- Outcome
- selective to arrowleaf clovere0
- Direction
- consistently selectivee0
Not reportedComparator
Verbatim
e0“2,4DB at 0.56 kg/ha was consistently selective to arrowleaf clover”
Claim · model-written summary
2,4DB at 0.56 kg/ha adequately controlled broadleaf weeds, including curly dock seed stalk formation.
- Taxon
- arrowleaf clovere0
- Treatment
- 2,4DB at 0.56 kg/hae0
- Interactor
- curly docke0weed
- Outcome
- broadleaf weeds including seed stalk formation of curly docke0
- Direction
- controllede0
Not reportedComparator
Verbatim
e0“2,4DB at 0.56 kg/ha was consistently selective to arrowleaf clover and adequately controlled the broadleaf weeds including seed stalk formation of curly dock ( Rumex crispus L.)”
Claim · model-written summary
MCPA at 0.56 kg/ha controlled broadleaf weeds.
Not reportedComparator
Verbatim
e0“MCPA at 0.56 kg/ha also controlled the broadleaf weeds”
t0“Arrowleaf Clover”
Claim · model-written summary
MCPA at 0.56 kg/ha was not consistently selective for arrowleaf clover.
- Taxon
- arrowleaf clovere0
- Treatment
- MCPA at 0.56 kg/hae0
- Outcome
- selective on arrowleaf clovere0
- Direction
- not consistently selectivee0
Not reportedComparator
Verbatim
e0“MCPA at 0.56 kg/ha also controlled the broadleaf weeds but was not consistently selective on arrowleaf clover”
Claim · model-written summary
2,4-D at 0.56 kg/ha controlled broadleaf weeds.
- Taxon
- Arrowleaf Clovert0
- Treatment
- 0.56 kg/ha rate of 2,4‐De0
- Outcome
- broadleaf weedse0
- Direction
- controllede0
Not reportedComparator
Verbatim
e0“The 0.56 kg/ha rate of 2,4‐D also controlled the broadleaf weeds”
t0“Arrowleaf Clover”
Claim · model-written summary
2,4-D at 0.56 kg/ha significantly reduced arrowleaf clover forage production.
- Taxon
- arrowleaf clovere0
- Treatment
- 0.56 kg/ha rate of 2,4‐De0
- Outcome
- forage production of arrowleaf clovere0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“The 0.56 kg/ha rate of 2,4‐D also controlled the broadleaf weeds and significantly reduced the forage production of arrowleaf clover”
Claim · model-written summary
2,4-D reduced arrowleaf clover seed production less than forage production, with significance at one location only.
Verbatim
e0“Seed production with the 2,4‐D treatment (0.56 kg/ha rate) was not suppressed as much as forage production and the decrease was only significant at one location”
t0“Arrowleaf Clover”
Claim · model-written summary
The 2,4D and banvel combination severely damaged arrowleaf clover.
- Taxon
- arrowleafe0
- Treatment
- combination of 2,4D and banvel (0.42 and 0.14 kg/ha respectively)e0
- Outcome
- damaged the arrowleafe0
- Direction
- severely damagede0
Not reportedComparator
Verbatim
e0“A combination of 2,4D and banvel (0.42 and 0.14 kg/ha respectively) severely damaged the arrowleaf”
Claim · model-written summary
The authors suggest the 2,4D and banvel combination could control arrowleaf clover.
Verbatim
e0“could be used as a treatment to control arrowleaf clover”