Abstract
Glyphosate-resistant Palmer amaranth has become a major problem for cotton producers throughout much of the southern United States. With cotton producers relying heavily on glyphosate-resistant cotton, an alternative solution to controlling resistant Palmer amaranth is needed. A field experiment was conducted during 2009 and 2010 at Marianna, AR, in which a rye cover crop and no cover crop were tested in combination with deep tillage with the use of a moldboard plow and no tillage to determine the impact on Palmer amaranth emergence in cotton. To establish a baseline population, 500,000 glyphosate-resistant Palmer amaranth seeds were placed in a 2-m 2 area in the middle of each plot and incorporated into the soil, and emergence was evaluated five times during the season. In 2009, both tillage and the cover crop reduced Palmer amaranth emergence in cotton, but the combination of the two reduced emergence 85%. In the second year, only the cover crop reduced Palmer amaranth emergence in cotton, a 68% reduction. Cover crops and deep tillage will not eliminate glyphosate-resistant Palmer amaranth; however, use of these tools will likely reduce the risks of failures associated with residual herbicides along with selection pressure placed on both PRE- and POST-applied herbicides. Additional efforts should focus on the integration of the best cultural practices identified in this research with use of residual herbicides and greater focus on limiting Palmer amaranth seed production and reducing the soil seedbank.
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Claims 6
Claim · model-written summary
Tillage reduced Palmer amaranth emergence in cotton in 2009.
- Taxon
- Cotton
Gossypium hirsutumt0 - Treatment
- tillagee0
- Interactor
- Palmer amaranthe0weed
- Outcome
- Palmer amaranth emergencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2009, both tillage and the cover crop reduced Palmer amaranth emergence in cotton”
t0“in Cotton”
Claim · model-written summary
Rye cover crop reduced Palmer amaranth emergence in cotton in 2009.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- cover crope0
- Interactor
- Palmer amaranthe0weed
- Outcome
- Palmer amaranth emergencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2009, both tillage and the cover crop reduced Palmer amaranth emergence in cotton”
t0“in Cotton”
Claim · model-written summary
The cover crop plus tillage reduced Palmer amaranth emergence 85% in 2009.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- combination of the twoe0
- Interactor
- Palmer amaranthe1weed
- Outcome
- emergencee0
- Direction
- reducede0
- Value
- 85%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the combination of the two reduced emergence 85%”
e1“impact on Palmer amaranth emergence in cotton”
t0“in Cotton”
Claim · model-written summary
Only the cover crop reduced Palmer amaranth emergence in the second year, by 68%.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- cover crope0
- Interactor
- Palmer amaranthe0weed
- Outcome
- Palmer amaranth emergencee0
- Direction
- reducede0
- Value
- 68%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the second year, only the cover crop reduced Palmer amaranth emergence in cotton, a 68% reduction”
t0“in Cotton”
Claim · model-written summary
The authors expect cover crops and deep tillage to reduce herbicide failure risk and selection pressure.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- reduce the risks of failures associated with residual herbicides along with selection pressuree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“use of these tools will likely reduce the risks of failures associated with residual herbicides along with selection pressure placed on both PRE- and POST-applied herbicides”
t0“in Cotton”
Claim · model-written summary
The authors call for integrating cultural practices with residual herbicides and limiting Palmer amaranth seed production and seedbank.
- Taxon
- CottonGossypium hirsutumt0
- Interactor
- Palmer amaranthe0weed
- Outcome
- integration of the best cultural practices identified in this research with use of residual herbicidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Additional efforts should focus on the integration of the best cultural practices identified in this research with use of residual herbicides and greater focus on limiting Palmer amaranth seed production and reducing the soil seedbank”
t0“in Cotton”
The same questions in other papers
cover crop · growth · Gossypium hirsutum (cotton)Positive and negative results
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- negative
- no effect
- negative
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See all 13 papers →tillage · growth · Gossypium hirsutum (cotton)Positive and negative results
29 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- negative
32 papers more in this group
See all 36 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.