Abstract
Abstract Pseudomonas aureofaciens (30-84) is a phenazine producing bacterium and reported as asuccessful biocontrol agent of some plant fungal pathogens. In the present study, the possibility of biological control of cotton damping-off caused by Rhizoctonia solani (AG-4) through phenazine production by the 30-84 strain, was investigated. In the search for the development of bioformulations of Pa (m) (PhzR–) and Pa (w) (PhzR+) strains of 30-84, four new carriers including soybean meal (SM), cottonseed meal (CM), rice bran (RB), and talc powder (TAL) were selected. The efficacy of bacterial formulations in reducing disease incidence was evaluated in four intervals (15, 30, 45, and 60 days after sowing), and compared with each bacterial suspension efficacy under green-house conditions. The results revealed that organic carriers were more effective than talc powder. It was also found that all the bioformulations were more efficient than each bacterial suspension. The most effective in reducing disease incidence was Pa (w) + RB. In contrast, Pa (m), Pa (m) + TAL, and Pa (m) + RB did not significantly suppress the disease in comparison with the infested control. Thus, phenazine production as a main biocontrol mechanism of P. aureofaciens (30-84) may be affected by the kind of carriers used for the bioformulation development.
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Claims 7
Claim · model-written summary
Organic carriers were more effective than talc powder against damping-off.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- organic carrierse0
- Outcome
- more effectivee0
- Direction
- more effectivee0
- Comparator
- talc powdere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results revealed that organic carriers were more effective than talc powder.”
t0“cotton seedling damping-off”
Claim · model-written summary
All bioformulations exceeded bacterial suspensions in efficacy.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- bioformulationse0
- Outcome
- more efficiente0
- Direction
- more efficiente0
- Comparator
- bacterial suspensione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It was also found that all the bioformulations were more efficient than each bacterial suspension.”
t0“cotton seedling damping-off”
Claim · model-written summary
Pa (w) + RB was most effective at reducing disease incidence.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Pa (w) + RBe0
- Outcome
- disease incidencee0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most effective in reducing disease incidence was Pa (w) + RB.”
t0“cotton seedling damping-off”
Claim · model-written summary
Pa (m) did not significantly suppress disease versus infested control.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Pa (m)e0
- Outcome
- diseasee0
- Direction
- did not significantly suppresse0
- Comparator
- infested controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pa (m), Pa (m) + TAL, and Pa (m) + RB did not significantly suppress the disease in comparison with the infested control.”
t0“cotton seedling damping-off”
Claim · model-written summary
Pa (m) + TAL did not significantly suppress disease.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Pa (m) + TALe0
- Outcome
- diseasee0
- Direction
- did not significantly suppresse0
- Comparator
- infested controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pa (m), Pa (m) + TAL, and Pa (m) + RB did not significantly suppress the disease in comparison with the infested control.”
t0“cotton seedling damping-off”
Claim · model-written summary
Pa (m) + RB did not significantly suppress disease.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Pa (m) + RBe0
- Outcome
- diseasee0
- Direction
- did not significantly suppresse0
- Comparator
- infested controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pa (m), Pa (m) + TAL, and Pa (m) + RB did not significantly suppress the disease in comparison with the infested control.”
t0“cotton seedling damping-off”
Claim · model-written summary
Carrier choice may affect phenazine-mediated biocontrol.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- biocontrol mechanisme0
- Qualifier
- kind of carrierse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“phenazine production as a main biocontrol mechanism of P. aureofaciens (30-84) may be affected by the kind of carriers used for the bioformulation development.”
t0“cotton seedling damping-off”
The same questions in other papers
Oryza sativa · disease · Gossypium hirsutum (cotton)Results agree
1 paper in the same direction as this paper
- positive
botanical · disease · Gossypium hirsutum (cotton)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
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.