Abstract
Four isolates of Bacillus subtilis coded, B4, B7, B8 and B10 were examined as biocontrol agents for their abilities and antagonistic effect on the in vitro growth of certain phytopathogenic fungi of peanut, Rhizoctonia solani and Sclerotium rolfsii. Bacillus subtilis isolate B4 (GenBank accession no. EF150884) was the highly effective one for inhibiting the fungal mycelial growth. Batch fermentation of B. subtilis isolate B4 was carried out and the maximum biomass achieved was 4.53 g L−1 at 11 h. Bacillus subtilis isolate B4 was formulated and evaluated as a biofungicide to reduce peanut soil-borne diseases under greenhouse and field conditions at the side of Rizolex-T (fungicide) as standard. Treatments by formulated plant growth-promoting rhizobacteria (PGPR) B. subtilis B4 and Rizolex-T in a soil infested with R. solani, S. rolfsii and mixture of them were more effective in decreasing percentage of damping-off, root and pod rot disease incidence (%) in greenhouse and open field environment during the two seasons 2015 and 2016. Treatments by PGPR gave highly dry weight and number of healthy pods compared to control of fungi treatment which was nearby to dry weights of healthy pods achieved by treatments by Rizolex-T in a soil infested with S. rolfsii, R. solani and mixture of them. Formulated PGPR B. subtilis B4 gave higher increasing of yield percentage than treatment by Rizolex-T in the two evaluated seasons 2015 and 2016. It can conclude that the produced bioforumlated agent was more efficient as fungicide when compared with the other chemical synthesized fungicides, safe for human and the environment and economy.
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Claims 6
Claim · model-written summary
Bacillus subtilis B4 most effectively inhibited peanut pathogen mycelial growth in vitro.
- Taxon
- peanut
Arachis hypogaeat0 - Interactor
- Bacillus subtilis isolate B4
Bacillus subtilise0biocontrol_agent - Outcome
- fungal mycelial growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacillus subtilis isolate B4 (GenBank accession no. EF150884) was the highly effective one for inhibiting the fungal mycelial growth”
t0“peanut soil-borne diseases”
Claim · model-written summary
Batch fermentation of B. subtilis B4 reached maximum biomass of 4.53 g L−1 at 11 h.
- Taxon
- peanutArachis hypogaeat0
- Interactor
- B. subtilis isolate B4Bacillus subtilise0biocontrol_agent
- Outcome
- biomasse0
- Direction
- maximume0
- Value
- 4.53 g L−1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Batch fermentation of B. subtilis isolate B4 was carried out and the maximum biomass achieved was 4.53 g L−1 at 11 h”
t0“peanut soil-borne diseases”
Claim · model-written summary
PGPR B. subtilis B4 and Rizolex-T decreased damping-off, root rot and pod rot incidence in infested soil.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- formulated plant growth-promoting rhizobacteria (PGPR) B. subtilis B4 and Rizolex-Te0
- Interactor
- R. solani
Rhizoctonia solanie0pathogen - Second interactor
- S. rolfsii
Agroathelia rolfsiie0pathogen - Outcome
- damping-off, root and pod rot disease incidencee0
- Direction
- decreasinge0
- Setting
- greenhouse and open field environmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments by formulated plant growth-promoting rhizobacteria (PGPR) B. subtilis B4 and Rizolex-T in a soil infested with R. solani, S. rolfsii and mixture of them were more effective in decreasing percentage of damping-off, root and pod rot disease incidence (%) in greenhouse and open field environment during the two seasons 2015 and 2016”
t0“peanut soil-borne diseases”
Claim · model-written summary
PGPR treatment increased healthy pod dry weight and number relative to fungal control.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- Treatments by PGPRe0
- Outcome
- dry weight and number of healthy podse0
- Direction
- highlye0
- Comparator
- control of fungi treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments by PGPR gave highly dry weight and number of healthy pods compared to control of fungi treatment which was nearby to dry weights of healthy pods achieved by treatments by Rizolex-T”
t0“peanut soil-borne diseases”
Claim · model-written summary
Formulated B. subtilis B4 produced higher yield percentage than Rizolex-T in both seasons.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- Formulated PGPR B. subtilis B4e0
- Interactor
- B. subtilis B4Bacillus subtilise0biocontrol_agent
- Outcome
- yield percentagee0
- Direction
- highere0
- Comparator
- treatment by Rizolex-Te0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Formulated PGPR B. subtilis B4 gave higher increasing of yield percentage than treatment by Rizolex-T in the two evaluated seasons 2015 and 2016”
t0“peanut soil-borne diseases”
Claim · model-written summary
The authors concluded the bioformulated agent was more efficient than chemical fungicides.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- more efficient as fungicidee0
- Comparator
- other chemical synthesized fungicidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the produced bioforumlated agent was more efficient as fungicide when compared with the other chemical synthesized fungicides”
t0“peanut soil-borne diseases”
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