Abstract
Field experiments were conducted to evaluate the influence of preemergence (PRE) herbicides metolachlor at 1,700 g ai/ha, pyrithiobac at 70 g ai/ha, or pendimethalin at 840 g ai/ha applied alone or with fluometuron at 1,300 g ai/ha and glyphosate postemergence (POST) at 840 g ai/ha on seedling diseases in glyphosate-resistant cotton. Hypocotyl disease severity both years averaged across PRE herbicide treatments was greater after glyphosate application to four-leaf cotton than cotyledon cotton. The PRE herbicide treatments, particularly those including fluometuron, increased root and hypocotyl disease ratings compared with a nontreated control, and a sequential application of glyphosate did not further increase disease severity. Greenhouse experiments using soil infested with Rhizoctonia solani confirmed findings from the field study showing that PRE herbicides can predispose cotton to greater seedling disease injury with no increased seedling disease severity associated with application of glyphosate. In the field study, glyphosate applied at cotyledon or four-leaf growth stages decreased disease severity on cotton hypocotyls both years. This inhibitory effect of glyphosate was less evident in the greenhouse study and may have been related to species of fungi present, infestation level, and differences in environmental conditions when compared with the field.
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Claims 6
Claim · model-written summary
Glyphosate applied to four-leaf cotton was associated with greater hypocotyl disease severity than application to cotyledon cotton.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- glyphosate application to four-leaf cottone0
- Outcome
- Hypocotyl disease severitye0
- Direction
- greatere0
- Qualifier
- both yearse0
- Comparator
- cotyledon cottone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hypocotyl disease severity both years averaged across PRE herbicide treatments was greater after glyphosate application to four-leaf cotton than cotyledon cotton.”
Claim · model-written summary
Preemergence herbicides increased cotton root and hypocotyl disease ratings relative to untreated control.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- PRE herbicide treatmentse0
- Outcome
- root and hypocotyl disease ratingse0
- Direction
- increasede0
- Qualifier
- particularly those including fluometurone0
- Comparator
- nontreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PRE herbicide treatments, particularly those including fluometuron, increased root and hypocotyl disease ratings compared with a nontreated control”
t0“Cotton”
Claim · model-written summary
Sequential glyphosate did not further increase seedling disease severity following preemergence herbicides.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- sequential application of glyphosatee0
- Outcome
- disease severitye0
- Direction
- did not further increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a sequential application of glyphosate did not further increase disease severity.”
t0“Cotton”
Claim · model-written summary
Greenhouse experiments with Rhizoctonia solani confirmed that preemergence herbicides predisposed cotton to greater seedling disease injury.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- PRE herbicidese0
- Interactor
- Rhizoctonia solani
Rhizoctonia solanie0pathogen - Outcome
- seedling disease injurye0
- Direction
- greatere0
- Setting
- Greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Greenhouse experiments using soil infested with Rhizoctonia solani confirmed findings from the field study showing that PRE herbicides can predispose cotton to greater seedling disease injury”
Claim · model-written summary
In the field, glyphosate at cotyledon or four-leaf stage decreased cotton hypocotyl disease severity in both years.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- glyphosate applied at cotyledon or four-leaf growth stagese0
- Outcome
- disease severity on cotton hypocotylse0
- Direction
- decreasede0
- Qualifier
- both yearse0
- Setting
- field studye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the field study, glyphosate applied at cotyledon or four-leaf growth stages decreased disease severity on cotton hypocotyls both years.”
Claim · model-written summary
The inhibitory effect of glyphosate on disease was less evident in the greenhouse than the field.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- glyphosatee0
- Outcome
- inhibitory effect of glyphosatee0
- Direction
- less evidente0
- Comparator
- fielde0
- Setting
- greenhouse studye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This inhibitory effect of glyphosate was less evident in the greenhouse study and may have been related to species of fungi present, infestation level, and differences in environmental conditions when compared with the field.”
t0“Cotton”
The same questions in other papers
glyphosate · disease · Gossypium hirsutum (cotton)Positive and negative results
4 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- no effect
4 papers more in this group
See all 8 papers →stage · disease · Gossypium hirsutum (cotton)Positive and negative results
2 in the opposite direction
- negative
- negative
herbicide · Rhizoctonia solani · Gossypium hirsutum (cotton)Results agree
2 papers in the same direction as this paper
- no effect
- no effect
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.