Abstract
The occurrence of the cotton root rot fungus, Phymatotrichum omnivorum (Shear) Duggar, in sharply defined, localized areas in certain fields led to the suggestion that there may be a specific soil chemical factor which limits the spread of the fungus. The available sodium, potassium, calcium, and magnesium contents of infested and adjacent noninfested soils in 13 fields were determined and compared. At seven sites, there were no significant differences in cation contents of infested and adjacent noninfested areas (p = 0.05). Available sodium levels were higher in infested areas at three sites, and higher in noninfested areas at three sites. Potassium and calcium levels were higher in the infested area at one site, and higher in the noninfested areas at two sites. Magnesium levels were higher in the noninfested areas at three sites. Contrary to previous reports, the fungus was found to cause severe disease in soils with available sodium contents as high as 4.2 milliequivalents per 100 g soil. Applications of sodium chloride at rates ranging from 1800 to 4000 kg/ha did not reduce disease severity or increase yield significantly in ten field trials.
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Claims 9
Claim · model-written summary
At seven sites, infested and adjacent noninfested soils did not differ significantly in cation contents.
- Taxon
- cotton
Gossypium hirsutumt0 - Outcome
- cation contentse0
- Direction
- no significant differencese0
- Comparator
- adjacent noninfested arease0
- Setting
- At seven sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At seven sites, there were no significant differences in cation contents of infested and adjacent noninfested areas (p = 0.05).”
t0“cotton root rot fungus”
Claim · model-written summary
Available sodium was higher in infested areas at three sites.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- Available sodium levelse0
- Direction
- highere0
- Setting
- infested areas at three sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Available sodium levels were higher in infested areas at three sites, and higher in noninfested areas at three sites.”
t0“cotton root rot fungus”
Claim · model-written summary
Available sodium was higher in noninfested areas at three sites.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- Available sodium levelse0
- Direction
- highere0
- Setting
- noninfested areas at three sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Available sodium levels were higher in infested areas at three sites, and higher in noninfested areas at three sites.”
t0“cotton root rot fungus”
Claim · model-written summary
Potassium and calcium were higher in the infested area at one site.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- Potassium and calcium levelse0
- Direction
- highere0
- Setting
- infested area at one sitee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium and calcium levels were higher in the infested area at one site, and higher in the noninfested areas at two sites.”
t0“cotton root rot fungus”
Claim · model-written summary
Potassium and calcium were higher in noninfested areas at two sites.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- Potassium and calcium levelse0
- Direction
- highere0
- Setting
- noninfested areas at two sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium and calcium levels were higher in the infested area at one site, and higher in the noninfested areas at two sites.”
t0“cotton root rot fungus”
Claim · model-written summary
Magnesium was higher in noninfested areas at three sites.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- Magnesium levelse0
- Direction
- highere0
- Setting
- noninfested areas at three sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Magnesium levels were higher in the noninfested areas at three sites.”
t0“cotton root rot fungus”
Claim · model-written summary
The fungus caused severe disease in soil with available sodium up to 4.2 milliequivalents per 100 g soil.
- Taxon
- cottonGossypium hirsutumt0
- Interactor
- funguse0pathogen
- Outcome
- severe diseasee0
- Value
- 4.2 milliequivalents per 100 g soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the fungus was found to cause severe disease in soils with available sodium contents as high as 4.2 milliequivalents per 100 g soil”
t0“cotton root rot fungus”
Claim · model-written summary
Sodium chloride applications did not significantly reduce disease severity in ten field trials.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- sodium chloride at rates ranging from 1800 to 4000 kg/hae0
- Outcome
- disease severitye0
- Direction
- did not reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of sodium chloride at rates ranging from 1800 to 4000 kg/ha did not reduce disease severity or increase yield significantly in ten field trials.”
t0“cotton root rot fungus”
Claim · model-written summary
Sodium chloride applications did not significantly increase yield in ten field trials.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- sodium chloride at rates ranging from 1800 to 4000 kg/hae0
- Outcome
- yielde0
- Direction
- did not reduce disease severity or increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of sodium chloride at rates ranging from 1800 to 4000 kg/ha did not reduce disease severity or increase yield significantly in ten field trials.”
t0“cotton root rot fungus”
The same questions in other papers
sodium chloride · disease · Gossypium hirsutum (cotton)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- no effect
1 paper more in this group
See all 5 papers →sodium chloride · yield · Gossypium hirsutum (cotton)Positive and negative results
3 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 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.