Paper · 1989 · Weed Science

Efficacy, Phytotoxicity, and Persistence of Imazaquin, Imazethapyr, and Clomazone in No-Till Double-Crop Soybeans (Glycine max)

J. Anthony Mills; William W. Witt

16
claims
30
verbatim quotes
66
citations
2
research areas
—
Not open access

Abstract

Experiments were conducted in 1985 and 1986 to determine and compare the efficacy, phytotoxicity, and soil persistence of imazquin, imazethapyr, and clomazone in no-till double-crop soybeans. All herbicides controlled 93% or greater jimsonweed, velvetleaf, and giant foxtail. Imazaquin and imazethapyr controlled more common cocklebur and ivyleaf morningglory than clomazone. Soybeans were injured from imazaquin and imazethapyr applications in 1986 but yields were not reduced. First-order kinetics described the dissipation of each herbicide. Imazaquin and imazethapyr were more persistent in the soil than clomazone. Averaged over both years, half-lives of 10, 43, and 60 days were calculated for clomazone, imazaquin, and imazethapyr, respectively. Clomazone was not detected 10 to 20 cm in the soil profile. More imazethapyr was detected 10 to 20 cm in the soil profile than imazaquin in 1985. Slight corn injury (≤10%) was observed in 1987 following previous year applications of imazaquin to no-till double-crop soybeans but corn yields were not reduced.

Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 16

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

All herbicides controlled 93% or more of jimsonweed in soybeans.

Taxon
soybeansGlycine maxe0
Treatment
All herbicidese1
Interactor
jimsonweedDatura stramoniume1weed
Outcome
controle1
Direction
controllede1
Value
93% or greatere1

Not reportedComparator

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Datura stramonium
Datura stramonium · InteractorNo machine-readable author provided. Taka assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“in no-till double-crop soybeans”

✓ located verbatim in the source · abstract, characters 159–190 · show in text ↑
e1

“All herbicides controlled 93% or greater jimsonweed, velvetleaf, and giant foxtail”

✓ located verbatim in the source · abstract, characters 192–274 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

All herbicides controlled 93% or more of velvetleaf in soybeans.

Taxon
soybeansGlycine maxe0
Treatment
All herbicidese1
Interactor
velvetleafAbutilon theophrastie1weed
Outcome
controle1
Direction
controllede1
Value
93% or greatere1

Not reportedComparator

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Abutilon theophrasti
Abutilon theophrasti · InteractorI.Sáček, senior · Public domain · Wikimedia Commons ↗

Verbatim

e0

“in no-till double-crop soybeans”

✓ located verbatim in the source · abstract, characters 159–190 · show in text ↑
e1

“All herbicides controlled 93% or greater jimsonweed, velvetleaf, and giant foxtail”

✓ located verbatim in the source · abstract, characters 192–274 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

All herbicides controlled 93% or more of giant foxtail in soybeans.

Taxon
soybeansGlycine maxe0
Treatment
All herbicidese1
Interactor
giant foxtaile1weed
Outcome
controle1
Direction
controllede1
Value
93% or greatere1

Not reportedComparator

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“in no-till double-crop soybeans”

✓ located verbatim in the source · abstract, characters 159–190 · show in text ↑
e1

“All herbicides controlled 93% or greater jimsonweed, velvetleaf, and giant foxtail”

✓ located verbatim in the source · abstract, characters 192–274 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Imazaquin and imazethapyr controlled common cocklebur more than clomazone did in soybeans.

Taxon
soybeansGlycine maxe0
Treatment
Imazaquin and imazethapyre1
Interactor
common cocklebure1weed
Outcome
controllede1
Direction
moree1
Comparator
clomazonee1

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“in no-till double-crop soybeans”

✓ located verbatim in the source · abstract, characters 159–190 · show in text ↑
e1

“Imazaquin and imazethapyr controlled more common cocklebur and ivyleaf morningglory than clomazone”

✓ located verbatim in the source · abstract, characters 276–374 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Imazaquin and imazethapyr controlled ivyleaf morningglory more than clomazone did in soybeans.

Taxon
soybeansGlycine maxe0
Treatment
Imazaquin and imazethapyre1
Interactor
ivyleaf morninggloryIpomoea hederaceae1weed
Outcome
controllede1
Direction
moree1
Comparator
clomazonee1

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Ipomoea hederacea
Ipomoea hederacea · InteractorUser:SB_Johnny · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“in no-till double-crop soybeans”

✓ located verbatim in the source · abstract, characters 159–190 · show in text ↑
e1

“Imazaquin and imazethapyr controlled more common cocklebur and ivyleaf morningglory than clomazone”

✓ located verbatim in the source · abstract, characters 276–374 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Imazaquin and imazethapyr applications injured soybeans in 1986.

Taxon
SoybeansGlycine maxe2
Treatment
imazaquin and imazethapyr applicationse2
Outcome
injurede2

Not reportedComparatorDirection

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“in no-till double-crop soybeans”

✓ located verbatim in the source · abstract, characters 159–190 · show in text ↑
e2

“Soybeans were injured from imazaquin and imazethapyr applications in 1986 but yields were not reduced”

✓ located verbatim in the source · abstract, characters 376–477 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Imazaquin and imazethapyr applications did not reduce soybean yields in 1986.

Taxon
SoybeansGlycine maxe2
Treatment
imazaquin and imazethapyr applicationse2
Outcome
yieldse2
Direction
not reducede2

Not reportedComparator

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e2

“Soybeans were injured from imazaquin and imazethapyr applications in 1986 but yields were not reduced”

✓ located verbatim in the source · abstract, characters 376–477 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

First-order kinetics described the dissipation of each herbicide in soybean fields.

Taxon
soybeansGlycine maxe0
Outcome
dissipatione3

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“in no-till double-crop soybeans”

✓ located verbatim in the source · abstract, characters 159–190 · show in text ↑
e3

“First-order kinetics described the dissipation of each herbicide”

✓ located verbatim in the source · abstract, characters 479–543 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Clomazone had a soil half-life of 10 days, averaged over both years.

Taxon
soybeansGlycine maxe0
Treatment
clomazonee4
Outcome
half-livese4
Value
10e4
Qualifier
Averaged over both yearse4

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“in no-till double-crop soybeans”

✓ located verbatim in the source · abstract, characters 159–190 · show in text ↑
e4

“Averaged over both years, half-lives of 10, 43, and 60 days were calculated for clomazone, imazaquin, and imazethapyr, respectively”

✓ located verbatim in the source · abstract, characters 620–751 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Imazaquin had a soil half-life of 43 days, averaged over both years.

Taxon
soybeansGlycine maxe0
Treatment
imazaquine4
Outcome
half-livese4
Value
43e4
Qualifier
Averaged over both yearse4

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“in no-till double-crop soybeans”

✓ located verbatim in the source · abstract, characters 159–190 · show in text ↑
e4

“Averaged over both years, half-lives of 10, 43, and 60 days were calculated for clomazone, imazaquin, and imazethapyr, respectively”

✓ located verbatim in the source · abstract, characters 620–751 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Imazethapyr had a soil half-life of 60 days, averaged over both years.

Taxon
soybeansGlycine maxe0
Treatment
imazethapyre4
Outcome
half-livese4
Value
60e4
Qualifier
Averaged over both yearse4

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“in no-till double-crop soybeans”

✓ located verbatim in the source · abstract, characters 159–190 · show in text ↑
e4

“Averaged over both years, half-lives of 10, 43, and 60 days were calculated for clomazone, imazaquin, and imazethapyr, respectively”

✓ located verbatim in the source · abstract, characters 620–751 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Clomazone was not detected at 10 to 20 cm in the soil profile.

Taxon
soybeansGlycine maxe0
Treatment
clomazonee5
Outcome
not detectede5
Setting
10 to 20 cm in the soil profilee5

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“in no-till double-crop soybeans”

✓ located verbatim in the source · abstract, characters 159–190 · show in text ↑
e5

“Clomazone was not detected 10 to 20 cm in the soil profile”

✓ located verbatim in the source · abstract, characters 753–811 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

More imazethapyr than imazaquin was detected at 10 to 20 cm in the soil profile in 1985.

Taxon
soybeansGlycine maxe0
Treatment
imazethapyre6
Outcome
detectede6
Direction
Moree6
Qualifier
in 1985e6
Comparator
imazaquine6
Setting
10 to 20 cm in the soil profilee6

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“in no-till double-crop soybeans”

✓ located verbatim in the source · abstract, characters 159–190 · show in text ↑
e6

“More imazethapyr was detected 10 to 20 cm in the soil profile than imazaquin in 1985”

✓ located verbatim in the source · abstract, characters 813–897 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Imazaquin and imazethapyr were more persistent in the soil than clomazone.

Taxon
soybeansGlycine maxe0
Treatment
Imazaquin and imazethapyre7
Outcome
persistent in the soile7
Direction
moree7
Comparator
clomazonee7

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“in no-till double-crop soybeans”

✓ located verbatim in the source · abstract, characters 159–190 · show in text ↑
e7

“Imazaquin and imazethapyr were more persistent in the soil than clomazone”

✓ located verbatim in the source · abstract, characters 545–618 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Previous-year imazaquin applications caused slight injury (≤10%) to corn in 1987.

Treatment
previous year applications of imazaquine0
Outcome
injurye0
Value
≤10%e0

Not reportedComparatorDirection

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Slight corn injury (≤10%) was observed in 1987 following previous year applications of imazaquin to no-till double-crop soybeans”

✓ located verbatim in the source · abstract, characters 899–1027 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Corn yields were not reduced by previous-year imazaquin applications.

Treatment
previous year applications of imazaquine1
Outcome
yieldse0
Direction
not reducede0

Not reportedComparator

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“corn yields were not reduced”

✓ located verbatim in the source · abstract, characters 1032–1060 · show in text ↑
e1

“Slight corn injury (≤10%) was observed in 1987 following previous year applications of imazaquin to no-till double-crop soybeans”

✓ located verbatim in the source · abstract, characters 899–1027 · show in text ↑

imazaquin · yield · Zea mays (maize)Results differ

7 papers: 0 positive, 7 negative or no effect

6 papers in the same direction as this paper

  1. negative
  2. negative
  3. negative

3 papers more in this group

See all 7 papers →

imazaquin · yield · Glycine max (soybean)Results differ

15 papers: 9 positive, 6 negative or no effect

5 papers in the same direction as this paper · 9 in the opposite direction

  1. positive
  2. negative
  3. positive

11 papers more in this group

See all 15 papers →

Imazethapyr · yield · Glycine max (soybean)Results differ

85 papers: 66 positive, 19 negative or no effect

18 papers in the same direction as this paper · 66 in the opposite direction

  1. positive
  2. positive
  3. positive

81 papers more in this group

See all 85 papers →

imazaquin · crop injury · Glycine max (soybean)Positive and negative results

5 papers: 2 positive, 3 negative or no effect

2 papers in the same direction as this paper · 2 in the opposite direction

  1. positive
  2. positive
  3. negative

1 paper more in this group

See all 5 papers →

Imazethapyr · crop injury · Glycine max (soybean)Positive and negative results

16 papers: 3 positive, 13 negative or no effect

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

  1. positive
  2. positive
  3. positive

12 papers more in this group

See all 16 papers →

Imazethapyr · control · Glycine max (soybean)Positive and negative results

25 papers: 21 positive, 4 negative or no effect

20 papers in the same direction as this paper · 4 in the opposite direction

  1. negative
  2. negative
  3. negative

21 papers more in this group

See all 25 papers →

imazaquin · control · Glycine max (soybean)Positive and negative results

25 papers: 21 positive, 4 negative or no effect

20 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative

  1. positive
  2. negative
  3. no effect

21 papers more in this group

See all 25 papers →

Imazethapyr · Ipomoea hederacea · Glycine max (soybean)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

8 of 13 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.

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.