Abstract
Inadequate corn stands due to extreme weather conditions may require producers to replant their corn fields. The use of GR corn, however, can result in difficulty in managing replanted corn without experiencing yield loss. Therefore, the objectives of this research were to evaluate the herbicide options for control of GR corn in a corn replant situation and to determine the effect of corn replanted into various initial corn stands on grain yield. Two field studies were conducted to accomplish the objectives. The first experiment was designed to identify the most efficacious herbicide treatment for GR corn removal in a corn replant situation. Clethodim (51 g ai ha −1 ) applied 6 d prior to replanting, paraquat (700 g ai ha −1 ) plus metribuzin (160 g ai ha −1 ) applied at replanting, and glufosinate (450 g ai ha −1 ) applied at replanting along with a sequential treatment 3 wk later provided 96 to 100% control of the initial corn stand and resulted in the highest yield. If corn from the first planting remains, the interaction between different sized plants can reduce yield of corn. Thus, a second field experiment was conducted to evaluate the influence on grain yield of corn replanted into various initial corn stands. Corn stands of 0, 20,000, 40,000, 60,000, 80,000, and 100,000 plants ha −1 were established and either followed by a corn replant at 80,000 seeds ha −1 or not replanted. Initial stands ≥ 60,000 plants ha −1 did not require a replant to maximize yield. Initial corn stands ≤ 40,000 plants ha −1 required a replant with initial stand control to maximize grain yield. The percent yield contribution from an initial stand of 20,000 plants ha −1 was 20% greater than the same population replanted a few weeks later, which showed the competitive advantage to earlier planting even at the lowest initial corn stand. Because of this competitive advantage, an initial stand must be removed to maximize corn yield in a replant situation.
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Claims 11
Claim · model-written summary
Clethodim applied 6 days before replanting gave 96 to 100% control of the initial corn stand.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- Clethodim (51 g ai ha −1 ) applied 6 d prior to replantinge1
- Outcome
- control of the initial corn stande1
- Direction
- providede1
- Value
- 96 to 100%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Clethodim (51 g ai ha −1 ) applied 6 d prior to replanting, paraquat (700 g ai ha −1 ) plus metribuzin (160 g ai ha −1 ) applied at replanting, and glufosinate (450 g ai ha −1 ) applied at replanting along with a sequential treatment 3 wk later provided 96 to 100% control of the initial corn stand and resulted in the highest yield”
Claim · model-written summary
Paraquat plus metribuzin applied at replanting gave 96 to 100% control of the initial corn stand.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- paraquat (700 g ai ha −1 ) plus metribuzin (160 g ai ha −1 ) applied at replantinge1
- Outcome
- control of the initial corn stande1
- Direction
- providede1
- Value
- 96 to 100%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Clethodim (51 g ai ha −1 ) applied 6 d prior to replanting, paraquat (700 g ai ha −1 ) plus metribuzin (160 g ai ha −1 ) applied at replanting, and glufosinate (450 g ai ha −1 ) applied at replanting along with a sequential treatment 3 wk later provided 96 to 100% control of the initial corn stand and resulted in the highest yield”
Claim · model-written summary
Glufosinate with a sequential treatment 3 weeks later gave 96 to 100% control of the initial corn stand.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- glufosinate (450 g ai ha −1 ) applied at replanting along with a sequential treatment 3 wk latere1
- Outcome
- control of the initial corn stande1
- Direction
- providede1
- Value
- 96 to 100%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Clethodim (51 g ai ha −1 ) applied 6 d prior to replanting, paraquat (700 g ai ha −1 ) plus metribuzin (160 g ai ha −1 ) applied at replanting, and glufosinate (450 g ai ha −1 ) applied at replanting along with a sequential treatment 3 wk later provided 96 to 100% control of the initial corn stand and resulted in the highest yield”
Claim · model-written summary
Clethodim applied before replanting resulted in the highest corn yield.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Clethodim (51 g ai ha −1 ) applied 6 d prior to replantinge1
- Outcome
- yielde1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Clethodim (51 g ai ha −1 ) applied 6 d prior to replanting, paraquat (700 g ai ha −1 ) plus metribuzin (160 g ai ha −1 ) applied at replanting, and glufosinate (450 g ai ha −1 ) applied at replanting along with a sequential treatment 3 wk later provided 96 to 100% control of the initial corn stand and resulted in the highest yield”
Claim · model-written summary
Paraquat plus metribuzin applied at replanting resulted in the highest corn yield.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- paraquat (700 g ai ha −1 ) plus metribuzin (160 g ai ha −1 ) applied at replantinge1
- Outcome
- yielde1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Clethodim (51 g ai ha −1 ) applied 6 d prior to replanting, paraquat (700 g ai ha −1 ) plus metribuzin (160 g ai ha −1 ) applied at replanting, and glufosinate (450 g ai ha −1 ) applied at replanting along with a sequential treatment 3 wk later provided 96 to 100% control of the initial corn stand and resulted in the highest yield”
Claim · model-written summary
Glufosinate with a sequential treatment resulted in the highest corn yield.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- glufosinate (450 g ai ha −1 ) applied at replanting along with a sequential treatment 3 wk latere1
- Outcome
- yielde1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Clethodim (51 g ai ha −1 ) applied 6 d prior to replanting, paraquat (700 g ai ha −1 ) plus metribuzin (160 g ai ha −1 ) applied at replanting, and glufosinate (450 g ai ha −1 ) applied at replanting along with a sequential treatment 3 wk later provided 96 to 100% control of the initial corn stand and resulted in the highest yield”
Claim · model-written summary
Initial corn stands of 60,000 plants/ha or more did not require replanting to maximise yield.
- Taxon
- cornZea mays subsp. mayse1
- Outcome
- maximize yielde2
- Direction
- did not requiree2
- Qualifier
- Initial stands ≥ 60,000 plants ha −1e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Clethodim (51 g ai ha −1 ) applied 6 d prior to replanting, paraquat (700 g ai ha −1 ) plus metribuzin (160 g ai ha −1 ) applied at replanting, and glufosinate (450 g ai ha −1 ) applied at replanting along with a sequential treatment 3 wk later provided 96 to 100% control of the initial corn stand and resulted in the highest yield”
e2“Initial stands ≥ 60,000 plants ha −1 did not require a replant to maximize yield”
Claim · model-written summary
Initial corn stands of 40,000 plants/ha or fewer required replanting with initial stand control to maximise grain yield.
- Taxon
- cornZea mays subsp. mayse1
- Outcome
- maximize grain yielde3
- Direction
- requirede3
- Qualifier
- initial stand controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Clethodim (51 g ai ha −1 ) applied 6 d prior to replanting, paraquat (700 g ai ha −1 ) plus metribuzin (160 g ai ha −1 ) applied at replanting, and glufosinate (450 g ai ha −1 ) applied at replanting along with a sequential treatment 3 wk later provided 96 to 100% control of the initial corn stand and resulted in the highest yield”
e3“Initial corn stands ≤ 40,000 plants ha −1 required a replant with initial stand control to maximize grain yield”
Claim · model-written summary
Yield contribution from an initial stand of 20,000 plants/ha was 20% greater than the same population replanted a few weeks later.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- an initial stand of 20,000 plants ha −1e4
- Outcome
- percent yield contributione4
- Direction
- greatere4
- Value
- 20%e4
- Comparator
- the same population replanted a few weeks latere4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Clethodim (51 g ai ha −1 ) applied 6 d prior to replanting, paraquat (700 g ai ha −1 ) plus metribuzin (160 g ai ha −1 ) applied at replanting, and glufosinate (450 g ai ha −1 ) applied at replanting along with a sequential treatment 3 wk later provided 96 to 100% control of the initial corn stand and resulted in the highest yield”
e4“The percent yield contribution from an initial stand of 20,000 plants ha −1 was 20% greater than the same population replanted a few weeks later”
Claim · model-written summary
Earlier planting gives corn a competitive advantage, even at the lowest initial stand.
- Taxon
- cornZea mays subsp. mayse1
- Outcome
- competitive advantage to earlier plantinge5
- Qualifier
- even at the lowest initial corn stande5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Clethodim (51 g ai ha −1 ) applied 6 d prior to replanting, paraquat (700 g ai ha −1 ) plus metribuzin (160 g ai ha −1 ) applied at replanting, and glufosinate (450 g ai ha −1 ) applied at replanting along with a sequential treatment 3 wk later provided 96 to 100% control of the initial corn stand and resulted in the highest yield”
e5“which showed the competitive advantage to earlier planting even at the lowest initial corn stand”
Claim · model-written summary
An initial stand must be removed to maximise corn yield in a replant situation.
- Taxon
- cornZea mays subsp. mayse1
- Outcome
- maximize corn yielde6
- Qualifier
- in a replant situatione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Clethodim (51 g ai ha −1 ) applied 6 d prior to replanting, paraquat (700 g ai ha −1 ) plus metribuzin (160 g ai ha −1 ) applied at replanting, and glufosinate (450 g ai ha −1 ) applied at replanting along with a sequential treatment 3 wk later provided 96 to 100% control of the initial corn stand and resulted in the highest yield”
e6“an initial stand must be removed to maximize corn yield in a replant situation”
The same questions in other papers
clethodim · yield · Zea mays (maize)Results differ
3 in the opposite direction
- no effect
- negative
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See all 22 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.