Abstract
Bronze wilt (BW) is a disorder of cotton (Gossypium hirsutum L.) that has reduced yields of susceptible cultivars, and may recur in future cultivar releases. Because BW may impair uptake or translocation of mineral nutrients, soil fertility may affect BW incidence or its impact on growth and development. A 3-year study was conducted to determine effects of N and K fertility and tillage on BW incidence and impact on growth and development of field-grown cotton. Incidence of BW was relatively low and unaffected by N or K fertility in this study with or without tillage. Neither N fertility nor tillage affected growth and development responses to BW, although high N fertility delayed appearance of secondary symptoms by an average of 3.5 days. Plant growth response to K fertility was suppressed by BW. Boll retention was reduced more than vegetative growth by BW, but this response was not mitigated by N or K fertilization. Leaves of BW plants had equivalent K concentration as normal plants, but 30% lower P, indicating that BW impaired P uptake or translocation. Results suggest that N and K fertilization are not useful methods to manage BW, but P nutrition merits further research. Accepted for publication 17 August 2008. Published 17 November 2008.
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Claims 13
Claim · model-written summary
Bronze wilt incidence was low and unaffected by N or K fertility with or without tillage.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- N or K fertilitye0
- Outcome
- Incidence of BWe0
- Direction
- unaffectede0
- Qualifier
- with or without tillagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Incidence of BW was relatively low and unaffected by N or K fertility in this study with or without tillage.”
t0“cotton”
Claim · model-written summary
N fertility did not affect cotton growth or development responses to bronze wilt.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- N fertilitye0
- Outcome
- growth and development responses to BWe0
- Direction
- Neithere0
- Qualifier
- BWe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither N fertility nor tillage affected growth and development responses to BW”
t0“cotton”
Claim · model-written summary
Tillage did not affect cotton growth or development responses to bronze wilt.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- tillagee0
- Outcome
- growth and development responses to BWe0
- Direction
- Neithere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither N fertility nor tillage affected growth and development responses to BW”
t0“cotton”
Claim · model-written summary
High N fertility delayed secondary bronze wilt symptoms by 3.5 days on average.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- high N fertilitye0
- Outcome
- appearance of secondary symptomse0
- Direction
- delayede0
- Value
- 3.5 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high N fertility delayed appearance of secondary symptoms by an average of 3.5 days.”
t0“cotton”
Claim · model-written summary
Bronze wilt suppressed plant growth response to K fertility.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- BWe0
- Outcome
- Plant growth response to K fertilitye0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant growth response to K fertility was suppressed by BW.”
t0“cotton”
Claim · model-written summary
Bronze wilt reduced boll retention more than vegetative growth.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- BWe0
- Outcome
- Boll retentione0
- Direction
- reducede0
- Comparator
- vegetative growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Boll retention was reduced more than vegetative growth by BW”
t0“cotton”
Claim · model-written summary
N fertilization did not mitigate the bronze wilt reduction in boll retention.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Ne0
- Outcome
- this responsee0
- Direction
- not mitigatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this response was not mitigated by N or K fertilization.”
t0“cotton”
Claim · model-written summary
K fertilization did not mitigate the bronze wilt reduction in boll retention.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- K fertilizatione0
- Outcome
- this responsee0
- Direction
- not mitigatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this response was not mitigated by N or K fertilization.”
t0“cotton”
Claim · model-written summary
Bronze wilt leaves had equivalent K concentration to normal leaves.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- Leavese0
- Outcome
- K concentratione0
- Direction
- equivalente0
- Comparator
- normal plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves of BW plants had equivalent K concentration as normal plants, but 30% lower P”
t0“cotton”
Claim · model-written summary
Bronze wilt leaves had 30% lower P than normal leaves.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- Leavese0
- Outcome
- Pe0
- Direction
- lowere0
- Value
- 30%e0
- Comparator
- normal plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves of BW plants had equivalent K concentration as normal plants, but 30% lower P”
t0“cotton”
Claim · model-written summary
Bronze wilt may impair P uptake or translocation.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- P uptake or translocatione0
- Qualifier
- BW impairede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“indicating that BW impaired P uptake or translocation.”
t0“cotton”
Claim · model-written summary
N and K fertilization are not useful bronze wilt management methods.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- N and K fertilization are not useful methods to manage BWe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results suggest that N and K fertilization are not useful methods to manage BW, but P nutrition merits further research.”
t0“cotton”
Claim · model-written summary
P nutrition merits further research for bronze wilt management.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- P nutrition merits further researche0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P nutrition merits further research.”
t0“cotton”
The same questions in other papers
tillage · disease · Gossypium hirsutum (cotton)Positive and negative results
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- positive
- positive
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See all 13 papers →nitrogen · disease · Gossypium hirsutum (cotton)Positive and negative results
9 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- no effect
11 papers more in this group
See all 15 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.