Abstract
Experiments were conducted at Manhattan, KS in 2005 and 2006 to evaluate cotton response to simulated 2,4-D and dicamba drift rates at different stages of growth and multiple applications of 2,4-D. Cotton was treated with 2,4-D and dicamba at 0, 1/200, and 1/400 of the use rate (561 g ae/ha) when plants were at the three- to four-leaf, 8-, 14-, or 18-node growth stages. Injury symptoms after 2,4-D and dicamba application were more severe at the three- to four-leaf stage compared with other stages with greatest injury from 2,4-D. In general, plants partially recovered from 2,4-D and dicamba injury symptoms, and only 2,4-D applied at the 1/200 rate reduced fiber yield. In a separate study, cotton was treated with 2,4-D at 0, 1/400, 1/800, and 1/1,200 of the use rate for one, two, or three applications. Yield reduction increased as herbicide rate increased from 1/1,200 to 1/400 and the number of applications increased from one to three. In both studies, plants partially or fully recovered from injury symptoms and recovery was greater with dicamba than 2,4-D. Correlation coefficient analysis showed that visual injury ratings later in the growing season are a good predictor of yield reduction ( R 2 = 0.58).
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Claims 7
Claim · model-written summary
Injury symptoms from 2,4-D and dicamba were more severe at the three- to four-leaf stage than at other growth stages, with the greatest injury from 2,4-D.
- Taxon
- Cotton
Gossypium hirsutume0 - Organ / stage
- three- to four-leaf stagee1
- Treatment
- 2,4-D and dicambae1
- Outcome
- Injury symptomse1
- Direction
- more severee1
- Qualifier
- greatest injury from 2,4-De1
- Comparator
- other stagese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton was treated with 2,4-D and dicamba at 0, 1/200, and 1/400 of the use rate (561 g ae/ha) when plants were at the three- to four-leaf, 8-, 14-, or 18-node growth stages”
e1“Injury symptoms after 2,4-D and dicamba application were more severe at the three- to four-leaf stage compared with other stages with greatest injury from 2,4-D”
Claim · model-written summary
Cotton plants partially recovered from 2,4-D and dicamba injury symptoms.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- 2,4-D and dicambae2
- Outcome
- injury symptomse2
- Direction
- partially recoverede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton was treated with 2,4-D and dicamba at 0, 1/200, and 1/400 of the use rate (561 g ae/ha) when plants were at the three- to four-leaf, 8-, 14-, or 18-node growth stages”
e2“In general, plants partially recovered from 2,4-D and dicamba injury symptoms, and only 2,4-D applied at the 1/200 rate reduced fiber yield”
Claim · model-written summary
2,4-D applied at the 1/200 rate reduced cotton fiber yield.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- 2,4-D applied at the 1/200 ratee2
- Outcome
- fiber yielde2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton was treated with 2,4-D and dicamba at 0, 1/200, and 1/400 of the use rate (561 g ae/ha) when plants were at the three- to four-leaf, 8-, 14-, or 18-node growth stages”
e2“In general, plants partially recovered from 2,4-D and dicamba injury symptoms, and only 2,4-D applied at the 1/200 rate reduced fiber yield”
Claim · model-written summary
Cotton yield reduction increased as the 2,4-D rate increased from 1/1,200 to 1/400 of the use rate.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- herbicide rate increased from 1/1,200 to 1/400e4
- Outcome
- Yield reductione4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton was treated with 2,4-D and dicamba at 0, 1/200, and 1/400 of the use rate (561 g ae/ha) when plants were at the three- to four-leaf, 8-, 14-, or 18-node growth stages”
e4“Yield reduction increased as herbicide rate increased from 1/1,200 to 1/400 and the number of applications increased from one to three”
Claim · model-written summary
Cotton yield reduction increased as the number of 2,4-D applications increased from one to three.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- the number of applications increased from one to threee4
- Outcome
- Yield reductione4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton was treated with 2,4-D and dicamba at 0, 1/200, and 1/400 of the use rate (561 g ae/ha) when plants were at the three- to four-leaf, 8-, 14-, or 18-node growth stages”
e4“Yield reduction increased as herbicide rate increased from 1/1,200 to 1/400 and the number of applications increased from one to three”
Claim · model-written summary
Cotton recovery was greater with dicamba than with 2,4-D.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- dicambae5
- Outcome
- recoverye5
- Direction
- greatere5
- Comparator
- 2,4-De5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton was treated with 2,4-D and dicamba at 0, 1/200, and 1/400 of the use rate (561 g ae/ha) when plants were at the three- to four-leaf, 8-, 14-, or 18-node growth stages”
e5“In both studies, plants partially or fully recovered from injury symptoms and recovery was greater with dicamba than 2,4-D”
Claim · model-written summary
Visual injury ratings late in the season are a good predictor of cotton yield reduction.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- visual injury ratings later in the growing seasone6
- Outcome
- yield reductione6
- Value
- R 2 = 0.58e6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton was treated with 2,4-D and dicamba at 0, 1/200, and 1/400 of the use rate (561 g ae/ha) when plants were at the three- to four-leaf, 8-, 14-, or 18-node growth stages”
e6“Correlation coefficient analysis showed that visual injury ratings later in the growing season are a good predictor of yield reduction ( R 2 = 0.58)”
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See all 182 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.