Abstract
Abstract Dicamba-resistant (DR) kochia is an increasing concern for growers in the US Great Plains, including Kansas. Greenhouse and field experiments (Garden City and Tribune, KS, in the 2014 to 2015 growing season) were conducted to characterize the dicamba resistance levels in two recently evolved DR kochia accessions collected from fallow fields (wheat–sorghum–fallow rotation) near Hays, KS, and to determine the effectiveness of various PRE herbicide tank mixtures applied in fall or spring prior to the fallow year. Dicamba dose–response studies indicated that the KS-110 and KS-113 accessions had 5- to 8-fold resistance to dicamba, respectively, relative to a dicamba-susceptible (DS) accession. In separate field studies, atrazine-based PRE herbicide tank mixtures, dicamba + pendimethalin + sulfentrazone, and metribuzin + sulfentrazone when applied in the spring had excellent kochia control (85% to 95%) for 3 to 4 mo at the Garden City and Tribune sites. In contrast, kochia control with those PRE herbicide tank mixtures when applied in the fall did not exceed 79% at the later evaluation dates. In conclusion, the tested kochia accessions from western Kansas had evolved moderate to high levels of resistance to dicamba. Growers should utilize these effective PRE herbicide tank mixtures (multiple sites of action) in early spring to manage kochia seed bank during the summer fallow phase of this 3-yr crop rotation (wheat–corn/sorghum–fallow) in the Central Great Plains.
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Claims 7
Claim · model-written summary
KS-110 kochia showed 5-fold dicamba resistance relative to a susceptible accession.
- Taxon
- wheat
Triticum aestivume1 - Material
- KS-110e0
- Outcome
- resistance to dicambae0
- Direction
- resistancee0
- Value
- 5- to 8-folde0
- Comparator
- dicamba-susceptible (DS) accessione0
BassiaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the KS-110 and KS-113 accessions had 5- to 8-fold resistance to dicamba, respectively, relative to a dicamba-susceptible (DS) accession”
e1“fallow fields (wheat–sorghum–fallow rotation)”
e2“DR kochia accessions”
Claim · model-written summary
KS-113 kochia showed 8-fold dicamba resistance relative to a susceptible accession.
- Taxon
- wheatTriticum aestivume1
- Material
- KS-113e0
- Outcome
- resistance to dicambae0
- Direction
- resistancee0
- Value
- 5- to 8-folde0
- Comparator
- dicamba-susceptible (DS) accessione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the KS-110 and KS-113 accessions had 5- to 8-fold resistance to dicamba, respectively, relative to a dicamba-susceptible (DS) accession”
e1“fallow fields (wheat–sorghum–fallow rotation)”
e2“DR kochia accessions”
Claim · model-written summary
Spring atrazine-based PRE mixtures controlled kochia at 85% to 95% for 3 to 4 months.
- Taxon
- wheatTriticum aestivume1
- Treatment
- atrazine-based PRE herbicide tank mixturese0
- Outcome
- kochia controle0
- Direction
- excellente0
- Value
- 85% to 95%e0
- Setting
- Garden City and Tribunee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“atrazine-based PRE herbicide tank mixtures, dicamba + pendimethalin + sulfentrazone, and metribuzin + sulfentrazone when applied in the spring had excellent kochia control (85% to 95%) for 3 to 4 mo at the Garden City and Tribune sites”
e1“fallow fields (wheat–sorghum–fallow rotation)”
Claim · model-written summary
Spring dicamba + pendimethalin + sulfentrazone controlled kochia at 85% to 95%.
- Taxon
- wheatTriticum aestivume1
- Treatment
- dicamba + pendimethalin + sulfentrazonee0
- Outcome
- kochia controle0
- Direction
- excellente0
- Value
- 85% to 95%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dicamba + pendimethalin + sulfentrazone, and metribuzin + sulfentrazone when applied in the spring had excellent kochia control (85% to 95%) for 3 to 4 mo at the Garden City and Tribune sites”
e1“fallow fields (wheat–sorghum–fallow rotation)”
Claim · model-written summary
Spring metribuzin + sulfentrazone controlled kochia at 85% to 95%.
- Taxon
- wheatTriticum aestivume1
- Treatment
- metribuzin + sulfentrazonee0
- Outcome
- kochia controle0
- Direction
- excellente0
- Value
- 85% to 95%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“metribuzin + sulfentrazone when applied in the spring had excellent kochia control (85% to 95%) for 3 to 4 mo at the Garden City and Tribune sites”
e1“fallow fields (wheat–sorghum–fallow rotation)”
Claim · model-written summary
Fall application of those mixtures did not exceed 79% kochia control at later dates.
- Taxon
- wheatTriticum aestivume1
- Treatment
- those PRE herbicide tank mixtures when applied in the falle0
- Outcome
- kochia controle0
- Direction
- did not exceede0
- Value
- 79%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“kochia control with those PRE herbicide tank mixtures when applied in the fall did not exceed 79% at the later evaluation dates”
e1“fallow fields (wheat–sorghum–fallow rotation)”
Claim · model-written summary
Growers should apply effective PRE mixtures in early spring to manage the kochia seed bank.
- Taxon
- wheatTriticum aestivume0
- Treatment
- effective PRE herbicide tank mixturese0
- Outcome
- manage kochia seed banke0
- Setting
- Central Great Plainse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growers should utilize these effective PRE herbicide tank mixtures (multiple sites of action) in early spring to manage kochia seed bank during the summer fallow phase of this 3-yr crop rotation (wheat–corn/sorghum–fallow) in the Central Great Plains”
The same questions in other papers
sulfentrazone · Bassia · Triticum aestivum (wheat)Results agree
1 paper in the same direction as this paper
- positive
dicamba · Bassia · 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 →herbicide · Bassia · Triticum aestivum (wheat)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.