Abstract
Target spot is an emerging disease in cotton. Studies in southwest and central Alabama in 2013 and 2014 assessed Headline 2.09SC and Quadris 2.08SC efficacy against target spot for improving yield when applied in an over-the-top or drop-nozzle configuration to the susceptible Phytogen 499 WRF and partially resistant Deltapine 1252 B2RF varieties. At three location-years, onset occurred in late July and exceeded 50% defoliation by mid-September; dry weather suppressed disease at the fourth location. Final defoliation was lower for the Headline drop than for the over-the-top nozzle arrangement and lower than Quadris regardless of nozzle arrangement. Despite higher defoliation of Phytogen 499 WRF, both varieties had similar yields at two locations in 2013 and inconsistent yields in 2014. Relative area under the disease curve (relAUC) for defoliation differed by fungicide treatment across location-years. Fungicides increased yields at one location in 2013, with greater yields for the Headline and Quadris drop-nozzle treatments than the control. Across three location-years with >50% defoliation, Headline drop-nozzle treatment improved Phytogen 499 WRF yield compared with no treatment. Despite better control, higher costs and maintenance issues will limit drop-nozzle use. Results show that a partially resistant variety is an effective target spot-management tool.
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Claims 14
Claim · model-written summary
Target spot began in late July and defoliation exceeded 50% by mid-September at three location-years.
- Taxon
- cotton
Gossypium hirsutume1 - Outcome
- defoliatione0
- Direction
- exceedede0
- Value
- 50%e0
- Setting
- three location-yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At three location-years, onset occurred in late July and exceeded 50% defoliation by mid-September”
e1“cotton”
Claim · model-written summary
Dry weather suppressed disease at the fourth location.
- Taxon
- cottonGossypium hirsutume1
- Outcome
- diseasee0
- Direction
- suppressede0
- Qualifier
- dry weathere0
- Setting
- fourth locatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dry weather suppressed disease at the fourth location”
e1“cotton”
Claim · model-written summary
Headline applied with drop nozzles reduced final defoliation relative to over-the-top application.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- Headline drope0
- Outcome
- Final defoliatione0
- Direction
- lowere0
- Comparator
- over-the-top nozzle arrangemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Final defoliation was lower for the Headline drop than for the over-the-top nozzle arrangement”
e1“cotton”
Claim · model-written summary
Headline drop nozzles reduced final defoliation relative to Quadris regardless of arrangement.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- Headline drope0
- Outcome
- Final defoliatione0
- Direction
- lowere0
- Comparator
- Quadrise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Final defoliation was lower for the Headline drop than for the over-the-top nozzle arrangement and lower than Quadris regardless of nozzle arrangement”
e1“cotton”
Claim · model-written summary
Phytogen 499 WRF had higher defoliation than the other variety.
- Taxon
- cottonGossypium hirsutume1
- Material
- Phytogen 499 WRFe0
- Outcome
- defoliatione0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Despite higher defoliation of Phytogen 499 WRF, both varieties had similar yields at two locations in 2013”
e1“cotton”
Claim · model-written summary
Both cotton varieties had similar yields at two locations in 2013.
- Taxon
- cottonGossypium hirsutume1
- Outcome
- yieldse0
- Direction
- similare0
- Setting
- two locations in 2013e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both varieties had similar yields at two locations in 2013 and inconsistent yields in 2014”
e1“cotton”
Claim · model-written summary
Variety yields were inconsistent in 2014.
- Taxon
- cottonGossypium hirsutume1
- Outcome
- yieldse0
- Setting
- 2014e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inconsistent yields in 2014”
e1“cotton”
Claim · model-written summary
Relative defoliation disease-curve area differed by fungicide treatment across location-years.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- fungicide treatmente0
- Outcome
- Relative area under the disease curve (relAUC) for defoliatione0
- Setting
- location-yearse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative area under the disease curve (relAUC) for defoliation differed by fungicide treatment across location-years”
e1“cotton”
Claim · model-written summary
Fungicides increased cotton yield at one 2013 location.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- Fungicidese0
- Outcome
- yieldse0
- Direction
- increasede0
- Setting
- one location in 2013e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fungicides increased yields at one location in 2013”
e1“cotton”
Claim · model-written summary
Headline drop-nozzle treatment yielded more than control at one 2013 location.
- Taxon
- cottonGossypium hirsutume2
- Treatment
- Headlinee0
- Outcome
- yieldse0
- Direction
- greatere0
- Comparator
- controle0
- Setting
- one location in 2013e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greater yields for the Headline and Quadris drop-nozzle treatments than the control”
e1“at one location in 2013”
e2“cotton”
Claim · model-written summary
Quadris drop-nozzle treatment yielded more than control at one 2013 location.
- Taxon
- cottonGossypium hirsutume2
- Treatment
- Quadris drop-nozzle treatmentse0
- Outcome
- yieldse0
- Direction
- greatere0
- Comparator
- controle0
- Setting
- one location in 2013e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greater yields for the Headline and Quadris drop-nozzle treatments than the control”
e1“at one location in 2013”
e2“cotton”
Claim · model-written summary
Headline drop-nozzle treatment improved Phytogen 499 WRF yield versus no treatment over three high-defoliation location-years.
- Taxon
- cottonGossypium hirsutume1
- Material
- Phytogen 499 WRFe0
- Treatment
- Headline drop-nozzle treatmente0
- Outcome
- yielde0
- Direction
- improvede0
- Qualifier
- >50% defoliatione0
- Comparator
- no treatmente0
- Setting
- three location-yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Across three location-years with >50% defoliation, Headline drop-nozzle treatment improved Phytogen 499 WRF yield compared with no treatment”
e1“cotton”
Claim · model-written summary
The authors conclude costs and maintenance will limit drop-nozzle use.
- Taxon
- cottonGossypium hirsutume1
- Outcome
- drop-nozzle usee0
- Qualifier
- higher costs and maintenance issuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher costs and maintenance issues will limit drop-nozzle use”
e1“cotton”
Claim · model-written summary
A partially resistant variety is an effective target spot management tool.
- Taxon
- cottonGossypium hirsutume1
- Outcome
- a partially resistant variety is an effective target spot-management toole0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a partially resistant variety is an effective target spot-management tool”
e1“cotton”
The same questions in other papers
fungicide · yield · Gossypium hirsutum (cotton)Positive and negative results
6 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- positive
4 papers more in this group
See all 8 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.