Abstract
In the mid-Atlantic region, there is increasing interest in the use of intercropping strategies to establish cover crops in corn cropping systems. However, intercropping may be limited by potential injury to cover crops from residual herbicide programs. Field experiments were conducted from 2013 to 2015 at Pennsylvania, Maryland, and New York locations ( n =8) to evaluate the effect of common residual corn herbicides on interseeded red clover and annual ryegrass. Cover crop establishment and response to herbicide treatments varied across sites and years. S -metolachlor, pyroxasulfone, pendimethalin, and dimethenamid- P reduced annual ryegrass biomass relative to the nontreated check, whereas annual ryegrass biomass in acetochlor treatments was no different compared with the nontreated check. The rank order of observed annual ryegrass biomass reduction among chloroacetamide herbicides was S -metolachlor>pyroxasulfone>dimethenamid- P >acetochlor. Annual ryegrass biomass was not reduced by any of the broadleaf control herbicides. Mesotrione reduced red clover biomass 80% compared to the nontreated check. No differences in red clover biomass were observed between saflufenacil, rimsulfuron and atrazine treatments compared to the nontreated check. Red clover was not reduced by any of the grass control herbicides. This research suggests that annual ryegrass and red clover can be successfully interseeded in silt loam soils of Pennsylvania following use of several shorter-lived residual corn herbicides, but further research is needed in areas with soil types other than silt loam or outside of the mid-Atlantic cropping region.
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Claims 14
Claim · model-written summary
Cover crop establishment and herbicide response varied by site and year.
Verbatim
e0“Cover crop establishment and response to herbicide treatments varied across sites and years.”
Claim · model-written summary
S-metolachlor reduced annual ryegrass biomass relative to untreated plots.
Verbatim
e0“S -metolachlor, pyroxasulfone, pendimethalin, and dimethenamid- P reduced annual ryegrass biomass relative to the nontreated check”
Claim · model-written summary
Pyroxasulfone reduced annual ryegrass biomass.
Verbatim
e0“S -metolachlor, pyroxasulfone, pendimethalin, and dimethenamid- P reduced annual ryegrass biomass relative to the nontreated check”
Claim · model-written summary
Pendimethalin reduced annual ryegrass biomass.
Verbatim
e0“S -metolachlor, pyroxasulfone, pendimethalin, and dimethenamid- P reduced annual ryegrass biomass relative to the nontreated check”
Claim · model-written summary
Dimethenamid-P reduced annual ryegrass biomass.
Verbatim
e0“S -metolachlor, pyroxasulfone, pendimethalin, and dimethenamid- P reduced annual ryegrass biomass relative to the nontreated check”
Claim · model-written summary
Acetochlor did not significantly differ from untreated plots for annual ryegrass biomass.
Verbatim
e0“annual ryegrass biomass in acetochlor treatments was no different compared with the nontreated check”
Claim · model-written summary
Annual ryegrass biomass reduction ranked S-metolachlor above pyroxasulfone, dimethenamid-P, and acetochlor.
Verbatim
e0“The rank order of observed annual ryegrass biomass reduction among chloroacetamide herbicides was S -metolachlor>pyroxasulfone>dimethenamid- P >acetochlor.”
Claim · model-written summary
Broadleaf control herbicides did not reduce annual ryegrass biomass.
- Taxon
- Annual ryegrasse0
- Treatment
- broadleaf control herbicidese0
- Outcome
- Annual ryegrass biomasse0
- Direction
- not reducede0
Not reportedComparator
Verbatim
e0“Annual ryegrass biomass was not reduced by any of the broadleaf control herbicides.”
Claim · model-written summary
Mesotrione reduced red clover biomass by 80%.
- Taxon
- red clover
Trifolium pratensee0 - Treatment
- Mesotrionee0
- Outcome
- red clover biomasse0
- Direction
- reducede0
- Value
- 80%e0
- Comparator
- nontreated checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mesotrione reduced red clover biomass 80% compared to the nontreated check.”
Claim · model-written summary
Saflufenacil did not differ from untreated plots for red clover biomass.
- Taxon
- red cloverTrifolium pratensee0
- Treatment
- saflufenacile0
- Outcome
- red clover biomasse0
- Direction
- No differencese0
- Comparator
- nontreated checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No differences in red clover biomass were observed between saflufenacil, rimsulfuron and atrazine treatments compared to the nontreated check.”
Claim · model-written summary
Rimsulfuron did not differ from untreated plots for red clover biomass.
- Taxon
- red cloverTrifolium pratensee0
- Treatment
- rimsulfurone0
- Outcome
- red clover biomasse0
- Direction
- No differencese0
- Comparator
- nontreated checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No differences in red clover biomass were observed between saflufenacil, rimsulfuron and atrazine treatments compared to the nontreated check.”
Claim · model-written summary
Atrazine did not differ from untreated plots for red clover biomass.
- Taxon
- red cloverTrifolium pratensee0
- Treatment
- atrazinee0
- Outcome
- red clover biomasse0
- Direction
- No differencese0
- Comparator
- nontreated checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No differences in red clover biomass were observed between saflufenacil, rimsulfuron and atrazine treatments compared to the nontreated check.”
Claim · model-written summary
Grass control herbicides did not reduce red clover biomass.
- Taxon
- Red cloverTrifolium pratensee0
- Treatment
- grass control herbicidese0
- Outcome
- red clover biomasse1
- Direction
- not reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Red clover was not reduced by any of the grass control herbicides.”
e1“No differences in red clover biomass were observed between saflufenacil, rimsulfuron and atrazine treatments compared to the nontreated check.”
Claim · model-written summary
The authors suggest annual ryegrass and red clover can be interseeded after several shorter-lived herbicides in Pennsylvania silt loam.
Verbatim
e0“annual ryegrass and red clover can be successfully interseeded in silt loam soils of Pennsylvania following use of several shorter-lived residual corn herbicides”
The same questions in other papers
herbicide · growth · Trifolium pratense (red clover)Positive and negative results
7 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- negative
5 papers more in this group
See all 9 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.