Paper · 1982 · Weed Science

Effects of Chlorsulfuron or 2,4-D upon Diclofop-Methyl Efficacy in Oat (Avena sativa)

Chris Hall; Lloyd V. Edgington; Clayton M. Switzer

8
claims
13
verbatim quotes
20
citations
1
research areas
—
Not open access

Abstract

Oat ( Avena sativa L. ‘Elgin′) seedlings were treated with combinations of diclofop-methyl {methyl ester of 2-[4-(2,4-dichlorophenoxy)phenoxy] propanoic acid} and 2,4-D amine [dimethylamine salt of (2,4-dichlorophenoxy) acetic acid] or diclofop-methyl and chlorsulfuron {2-chloro- N -[[(4-methoxy-6-methyl-1, 3, 5-triazin-2-yl)amino] carbonyl] benzenesulfonamide} to determine the effect of the added herbicide on diclofop-methyl activity. Diclofop-methyl applied alone at rates of 0.50, 0.75, and 1.00 kg/ha killed the oat plants 14 days after treatment. When 2,4-D amine at 0.74 and 1.11 kg/ha was combined with diclofop-methyl, the phytotoxicity of diclofop-methyl was reduced. An antagonistic interaction between diclofop-methyl and 2,4-D was detected. Chlorsulfuron, applied alone, at 20, 40, or 60 g/ha did not affect the growth of oats. Chlorsulfuron additions did not affect the activity of diclofop-methyl. Diclofop-methyl reduced oat coleoptile elongation. Equimolar concentrations of diclofop-methyl and 2,4-D at or above 1 μM significantly reduced the 2,4-D response. A ten-fold increase of either 2,4-D or diclofop-methyl, above an equimolar concentration of 1 μM, significantly enhanced the effect of the herbicide being increased.

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Claims 8

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Diclofop-methyl alone killed oat plants after 14 days.

Treatment
Diclofop-methyl applied alone at rates of 0.50, 0.75, and 1.00 kg/hae0
Outcome
killed the oat plantse0

Not reportedComparatorDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Avena sativa
Avena sativa · TaxonSendelbach ( talk ) · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Diclofop-methyl applied alone at rates of 0.50, 0.75, and 1.00 kg/ha killed the oat plants 14 days after treatment”

✓ located verbatim in the source · abstract, characters 440–554 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

2,4-D reduced diclofop-methyl phytotoxicity in oat.

Treatment
2,4-D amine at 0.74 and 1.11 kg/hae0
Outcome
phytotoxicity of diclofop-methyle0
Direction
reducede0
Comparator
diclofop-methyle0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Avena sativa
Avena sativa · TaxonSendelbach ( talk ) · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“When 2,4-D amine at 0.74 and 1.11 kg/ha was combined with diclofop-methyl, the phytotoxicity of diclofop-methyl was reduced”

✓ located verbatim in the source · abstract, characters 556–679 · show in text ↑
t0

“Oat (Avena sativa)”

✓ located verbatim in the source · title, characters 67–85 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Diclofop-methyl and 2,4-D interacted antagonistically.

Outcome
antagonistic interaction between diclofop-methyl and 2,4-De0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Avena sativa
Avena sativa · TaxonSendelbach ( talk ) · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“An antagonistic interaction between diclofop-methyl and 2,4-D was detected”

✓ located verbatim in the source · abstract, characters 681–755 · show in text ↑
t0

“Oat (Avena sativa)”

✓ located verbatim in the source · title, characters 67–85 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Chlorsulfuron alone did not affect oat growth.

Treatment
Chlorsulfuron, applied alone, at 20, 40, or 60 g/hae0
Outcome
growth of oatse0
Direction
did not affecte0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Avena sativa
Avena sativa · TaxonSendelbach ( talk ) · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Chlorsulfuron, applied alone, at 20, 40, or 60 g/ha did not affect the growth of oats”

✓ located verbatim in the source · abstract, characters 757–842 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Chlorsulfuron additions did not affect diclofop-methyl activity.

Treatment
Chlorsulfuron additionse0
Outcome
activity of diclofop-methyle0
Direction
did not affecte0
Comparator
diclofop-methyle0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Avena sativa
Avena sativa · TaxonSendelbach ( talk ) · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Chlorsulfuron additions did not affect the activity of diclofop-methyl”

✓ located verbatim in the source · abstract, characters 844–914 · show in text ↑
t0

“Oat (Avena sativa)”

✓ located verbatim in the source · title, characters 67–85 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Diclofop-methyl reduced oat coleoptile elongation.

Organ / stage
coleoptilee0
Treatment
Diclofop-methyle0
Outcome
coleoptile elongatione0
Direction
reducede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Avena sativa
Avena sativa · TaxonSendelbach ( talk ) · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Diclofop-methyl reduced oat coleoptile elongation”

✓ located verbatim in the source · abstract, characters 916–965 · show in text ↑
Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Equimolar diclofop-methyl and 2,4-D at 1 μM or more reduced the 2,4-D response.

Treatment
Equimolar concentrations of diclofop-methyl and 2,4-D at or above 1 μMe0
Outcome
2,4-D responsee0
Direction
reducede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Avena sativa
Avena sativa · TaxonSendelbach ( talk ) · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Equimolar concentrations of diclofop-methyl and 2,4-D at or above 1 μM significantly reduced the 2,4-D response”

✓ located verbatim in the source · abstract, characters 967–1078 · show in text ↑
t0

“Oat (Avena sativa)”

✓ located verbatim in the source · title, characters 67–85 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Increasing either herbicide tenfold enhanced its effect.

Treatment
ten-fold increase of either 2,4-D or diclofop-methyle0
Outcome
effect of the herbicidee0
Direction
enhancede0
Comparator
equimolar concentration of 1 μMe0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Avena sativa
Avena sativa · TaxonSendelbach ( talk ) · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“A ten-fold increase of either 2,4-D or diclofop-methyl, above an equimolar concentration of 1 μM, significantly enhanced the effect of the herbicide being increased”

✓ located verbatim in the source · abstract, characters 1080–1244 · show in text ↑
t0

“Oat (Avena sativa)”

✓ located verbatim in the source · title, characters 67–85 · show in text ↑

2,4-D · molecular: metabolites · Avena sativa (oats)Positive and negative results

3 papers: 1 positive, 2 negative or no effect

1 paper in the same direction as this paper · 1 in the opposite direction

  1. no effect
  2. positive
See all 3 papers →

diclofop-methyl · growth · Avena sativa (oats)Positive and negative results

5 papers: 1 positive, 4 negative or no effect

3 papers in the same direction as this paper · 1 in the opposite direction

  1. positive
  2. negative
  3. negative

1 paper more in this group

See all 5 papers →

2,4-D · crop injury · Avena sativa (oats)Results agree

3 papers: 3 positive, 0 negative or no effect

2 papers in the same direction as this paper

  1. positive
  2. positive
See all 3 papers →

diclofop-methyl · molecular: metabolites · Avena sativa (oats)Results agree

3 papers: 0 positive, 3 negative or no effect

2 papers in the same direction as this paper

  1. negative
  2. negative
See all 3 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.