Paper · 2017 · Weed Technology

Insecticide Seed Treatments as Safeners to Drift Rates of Herbicides in Soybean and Grain Sorghum

Nicholas R. Steppig; Jason K. Norsworthy; Robert C. Scott; et al.

7
claims
11
verbatim quotes
6
citations
1
research areas
—
Not open access

Abstract

Abstract Previous research has shown that some insecticide seed treatments provide safening effects in rice following exposure to low rates of the herbicides glyphosate and imazethapyr. However, no research has been conducted to determine whether a similar effect may be seen in soybean or grain sorghum, two important rotational crops across the Midsouth. To evaluate the potential safening effects of insecticide seed treatments in these two crops, field trials were conducted in Marianna, AR, in 2015 and 2016, and near Colt, AR, in 2016. In soybean, glyphosate, glufosinate, 2,4-D, dicamba, halosulfuron, mesotrione, tembotrione, and propanil were applied at low rates to simulate drift events, in combination with the insecticide seed treatments thiamethoxam and clothianidin at labeled rates. In grain sorghum, glyphosate, imazethapyr, and quizalofop were applied at low rates in combination with the insecticide seed treatments thiamethoxam, clothianidin, and imidacloprid at labeled rates. Injury reduction was seen at 1 site-year for glyphosate, glufosinate, 2,4-D, dicamba, mesotrione, and tembotrione, and at 2 of 3 site-years for halosulfuron. At 1 site-year, the safening in halosulfuron resulted in increases in both crop height and yield. In grain sorghum, reducing injury via seed treatments was generally more successful. All three herbicides applied in sorghum displayed instances of injury reduction when seed treatments were used at 1 or more site-years, including reducing injury upward of 40% in the case of quizalofop+clothianidin at Marianna in 2016. For 2 site-years, injury reduction through the use of insecticides resulted in increases in crop height and grain yield in grain sorghum compared with no insecticide use. Although the degree of safening seen varied depending on site-year in both crops, growers who use insecticide seed treatments on an annual basis may expect to see a safening effect from drift events of most herbicides evaluated in both soybean and grain sorghum.

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Claims 7

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Insecticide seed treatments reduced herbicide drift injury in soybean at 1 site-year for six herbicides.

Taxon
soybeanGlycine maxe0
Treatment
insecticide seed treatmentse0
Outcome
Injurye2
Direction
reductione2
Qualifier
applied at low rates to simulate drift eventse0
Setting
Marianna, ARe1

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 soybean, glyphosate, glufosinate, 2,4-D, dicamba, halosulfuron, mesotrione, tembotrione, and propanil were applied at low rates to simulate drift events, in combination with the insecticide seed treatments thiamethoxam and clothianidin at labeled rates”

✓ located verbatim in the source · abstract, characters 542–797 · show in text ↑
e1

“field trials were conducted in Marianna, AR, in 2015 and 2016, and near Colt, AR, in 2016”

✓ located verbatim in the source · abstract, characters 451–540 · show in text ↑
e2

“Injury reduction was seen at 1 site-year for glyphosate, glufosinate, 2,4-D, dicamba, mesotrione, and tembotrione, and at 2 of 3 site-years for halosulfuron”

✓ located verbatim in the source · abstract, characters 998–1154 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Insecticide seed treatments reduced halosulfuron drift injury in soybean at 2 of 3 site-years.

Taxon
soybeanGlycine maxe0
Treatment
insecticide seed treatmentse0
Outcome
Injurye2
Direction
reductione2
Value
2 of 3 site-yearse2
Qualifier
for halosulfurone2

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 soybean, glyphosate, glufosinate, 2,4-D, dicamba, halosulfuron, mesotrione, tembotrione, and propanil were applied at low rates to simulate drift events, in combination with the insecticide seed treatments thiamethoxam and clothianidin at labeled rates”

✓ located verbatim in the source · abstract, characters 542–797 · show in text ↑
e2

“Injury reduction was seen at 1 site-year for glyphosate, glufosinate, 2,4-D, dicamba, mesotrione, and tembotrione, and at 2 of 3 site-years for halosulfuron”

✓ located verbatim in the source · abstract, characters 998–1154 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Halosulfuron safening increased crop height and yield in soybean at 1 site-year.

Taxon
soybeanGlycine maxe0
Treatment
halosulfurone3
Outcome
crop height and yielde3
Direction
increasese3
Qualifier
1 site-yeare3

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 soybean, glyphosate, glufosinate, 2,4-D, dicamba, halosulfuron, mesotrione, tembotrione, and propanil were applied at low rates to simulate drift events, in combination with the insecticide seed treatments thiamethoxam and clothianidin at labeled rates”

✓ located verbatim in the source · abstract, characters 542–797 · show in text ↑
e3

“At 1 site-year, the safening in halosulfuron resulted in increases in both crop height and yield”

✓ located verbatim in the source · abstract, characters 1156–1252 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

In grain sorghum, reducing injury via seed treatments was generally more successful than in soybean.

Taxon
grain sorghumSorghum bicolore4
Treatment
seed treatmentse4
Outcome
injurye4
Direction
more successfule4

Not reportedComparator

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e4

“In grain sorghum, reducing injury via seed treatments was generally more successful”

✓ located verbatim in the source · abstract, characters 1254–1337 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Quizalofop plus clothianidin reduced sorghum injury by upward of 40% at Marianna in 2016, and all three herbicides showed injury reduction in sorghum at one or more site-years.

Taxon
sorghumSorghume5
Treatment
quizalofop+clothianidine5
Outcome
injurye5
Direction
reducinge5
Value
upward of 40%e5
Setting
Marianna in 2016e5

Not reportedComparator

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e5

“All three herbicides applied in sorghum displayed instances of injury reduction when seed treatments were used at 1 or more site-years, including reducing injury upward of 40% in the case of quizalofop+clothianidin at Marianna in 2016”

✓ located verbatim in the source · abstract, characters 1339–1573 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Insecticide use increased crop height and grain yield in grain sorghum at 2 site-years compared with no insecticide use.

Taxon
grain sorghumSorghum bicolore6
Treatment
insecticidese6
Outcome
crop height and grain yielde6
Direction
increasese6
Qualifier
2 site-yearse6
Comparator
no insecticide usee6

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e6

“For 2 site-years, injury reduction through the use of insecticides resulted in increases in crop height and grain yield in grain sorghum compared with no insecticide use”

✓ located verbatim in the source · abstract, characters 1575–1744 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

Growers who use insecticide seed treatments annually may expect a safening effect from drift of most herbicides in soybean and grain sorghum.

Taxon
soybean and grain sorghumGlycine maxSorghum bicolore7
Outcome
safening effecte7

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e7

“growers who use insecticide seed treatments on an annual basis may expect to see a safening effect from drift events of most herbicides evaluated in both soybean and grain sorghum”

✓ located verbatim in the source · abstract, characters 1828–2007 · show in text ↑

Halosulfuron-methyl · yield · Glycine max (soybean)Positive and negative results

2 papers: 1 positive, 1 negative or no effect

1 in the opposite direction

  1. no effect
See all 2 papers →

insecticide · yield · Sorghum bicolor (sorghum)Results differ

7 papers: 6 positive, 1 negative or no effect

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

  1. no effect
  2. positive
  3. positive

3 papers more in this group

See all 7 papers →

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

5 papers: 4 positive, 1 negative or no effect

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

  1. negative
  2. positive
  3. positive

1 paper more in this group

See all 5 papers →

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

10 papers: 6 positive, 4 negative or no effect

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

  1. negative
  2. negative
  3. negative

6 papers more in this group

See all 10 papers →

seed treatment · crop injury · Sorghum bicolor (sorghum)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 →

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.