Abstract
A field study was conducted to evaluate the effectiveness of several herbicides for long-term control of Canada thistle growing in winter wheat.Miscellaneous herbicides were applied at the five leaf stage of winter wheat in the presence of Canada thistle (30 plants per square meter).All herbicides gave effective control of Canada thistle topgrowth but did not increase yields compared to the weedy check.When Canada thistle control was evaluated one year after herbicide application, three of the nine treatments significantly reduced regrowth:2,4-D amine at 840 g/ha, clopyralid + MCPA ester at 100 + 400 g/ha 1 and Clopyralid at 200 g/ha.These treatments reduced Canada thistle numbers by 58%, 67%, and 83% respectively.All herbicide treatments significantly reduced Canada thistle dry matter production one year after application as measured by shoot dry weight per square meter.Clopyralid at 100 g/ha in mixture with either 2,4-D or MCPA ester at 400 g/ha, and 2,4-D amine alone at 840 g/ha reduced dry weight of thistle shoots equally.Clopyralid at 200 g/ha was the most effective treatment tested; Canada thistle shoot dry weight per square meter was reduced by 93% one year following treatment.
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Claims 9
Claim · model-written summary
All herbicides controlled Canada thistle topgrowth.
- Taxon
- winter wheat
Triticum aestivumt0 - Treatment
- herbicidese0
- Interactor
- Canada thistle
Cirsium arvensee0weed - Outcome
- Canada thistle topgrowthe0
- Direction
- effective controle0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Canada thistle regrowth control one year after herbicide application in winter wheat”
e0“All herbicides gave effective control of Canada thistle topgrowth but did not increase yields compared to the weedy check”
Claim · model-written summary
Herbicides did not increase wheat yield relative to the weedy check.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- herbicidese0
- Interactor
- Canada thistleCirsium arvensee0weed
- Outcome
- yieldse0
- Direction
- did not increasee0
- Comparator
- weedy checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Canada thistle regrowth control one year after herbicide application in winter wheat”
e0“All herbicides gave effective control of Canada thistle topgrowth but did not increase yields compared to the weedy check”
Claim · model-written summary
2,4-D amine at 840 g/ha reduced thistle numbers by 58% after one year.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- 2,4-D amine at 840 g/hae0
- Interactor
- Canada thistleCirsium arvensee1weed
- Outcome
- Canada thistle numberse1
- Direction
- reducede1
- Value
- 58%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Canada thistle regrowth control one year after herbicide application in winter wheat”
e0“three of the nine treatments significantly reduced regrowth:2,4-D amine at 840 g/ha, clopyralid + MCPA ester at 100 + 400 g/ha 1 and Clopyralid at 200 g/ha”
e1“These treatments reduced Canada thistle numbers by 58%, 67%, and 83% respectively”
Claim · model-written summary
Clopyralid plus MCPA ester at 100 + 400 g/ha reduced thistle numbers by 67% after one year.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- clopyralid + MCPA ester at 100 + 400 g/hae0
- Interactor
- Canada thistleCirsium arvensee1weed
- Outcome
- Canada thistle numberse1
- Direction
- reducede1
- Value
- 67%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Canada thistle regrowth control one year after herbicide application in winter wheat”
e0“three of the nine treatments significantly reduced regrowth:2,4-D amine at 840 g/ha, clopyralid + MCPA ester at 100 + 400 g/ha 1 and Clopyralid at 200 g/ha”
e1“These treatments reduced Canada thistle numbers by 58%, 67%, and 83% respectively”
Claim · model-written summary
Clopyralid at 200 g/ha reduced thistle numbers by 83% after one year.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- Clopyralid at 200 g/hae0
- Interactor
- Canada thistleCirsium arvensee1weed
- Outcome
- Canada thistle numberse1
- Direction
- reducede1
- Value
- 83%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Canada thistle regrowth control one year after herbicide application in winter wheat”
e0“three of the nine treatments significantly reduced regrowth:2,4-D amine at 840 g/ha, clopyralid + MCPA ester at 100 + 400 g/ha 1 and Clopyralid at 200 g/ha”
e1“These treatments reduced Canada thistle numbers by 58%, 67%, and 83% respectively”
Claim · model-written summary
All herbicide treatments reduced thistle shoot dry weight one year after application.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- herbicide treatmentse0
- Interactor
- Canada thistleCirsium arvensee0weed
- Outcome
- Canada thistle dry matter productione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Canada thistle regrowth control one year after herbicide application in winter wheat”
e0“All herbicide treatments significantly reduced Canada thistle dry matter production one year after application as measured by shoot dry weight per square meter”
Claim · model-written summary
Clopyralid mixed with 2,4-D reduced thistle shoot dry weight equally to the other named treatments.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- Clopyralid at 100 g/ha in mixture with either 2,4-De0
- Interactor
- Canada thistleCirsium arvenset0weed
- Outcome
- dry weight of thistle shootse0
- Direction
- reducede0
- Comparator
- 2,4-D amine alone at 840 g/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Canada thistle regrowth control one year after herbicide application in winter wheat”
e0“Clopyralid at 100 g/ha in mixture with either 2,4-D or MCPA ester at 400 g/ha, and 2,4-D amine alone at 840 g/ha reduced dry weight of thistle shoots equally”
Claim · model-written summary
Clopyralid mixed with MCPA ester reduced thistle shoot dry weight equally to the other named treatments.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- MCPA ester at 400 g/hae0
- Interactor
- Canada thistleCirsium arvenset0weed
- Outcome
- dry weight of thistle shootse0
- Direction
- reducede0
- Comparator
- 2,4-D amine alone at 840 g/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Canada thistle regrowth control one year after herbicide application in winter wheat”
e0“Clopyralid at 100 g/ha in mixture with either 2,4-D or MCPA ester at 400 g/ha, and 2,4-D amine alone at 840 g/ha reduced dry weight of thistle shoots equally”
Claim · model-written summary
Clopyralid at 200 g/ha was the most effective treatment and reduced thistle shoot dry weight by 93%.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- Clopyralid at 200 g/hae0
- Interactor
- Canada thistleCirsium arvensee0weed
- Outcome
- Canada thistle shoot dry weight per square metere0
- Direction
- reducede0
- Value
- 93%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Canada thistle regrowth control one year after herbicide application in winter wheat”
e0“Clopyralid at 200 g/ha was the most effective treatment tested; Canada thistle shoot dry weight per square meter was reduced by 93% one year following treatment”
The same questions in other papers
2,4-D · Cirsium arvense · Triticum aestivum (wheat)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
2 papers more in this group
See all 6 papers →clopyralid · Cirsium arvense · Triticum aestivum (wheat)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
herbicide · Cirsium arvense · Triticum aestivum (wheat)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 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.