Abstract
Considering the majority of studies confined in vitro evaluation of microbial bioagents against diseases, a study was carried out during 2018–21 at Assam Agricultural University, Jorhat, Assam, (in vivo and field studies) to assess bio-efficacy of B. subtilis (strain LB22)-based liquid bioformulation against bacterial wilt (Ralstonia solanacearum) and anthracnose (Colletotrichum gloeosporioides) diseases of chilli (Capsicum annuum L.). In vivo efficacy of B. subtilis formulation (inclusive treatment involving seed treatment, seedling dip, soil treatment and foliar spray) showed significant suppressiveness against both the diseases coupled with enhanced growth and yield attributes. Subsequently, the field evaluation of Bacillus subtilis formulation comparing standard chemicals also edged over the latter by 15.45% in terms of yield gains in 2-years of study. A significant reduction was found in disease severity during field evaluation of Bacillus subtilis formulation on account of induced resistance via upregulated synthesis of plant defense-enzymes (Polyphenol oxidase, peroxidase, phenylalanine ammonia-lyase, and β-1,3-glucanase) by 2.3–11.0 folds with their peaks mostly expressed within 24–72 h. These results put forward a conceptual framework for delivery mechanism of a microbial bioagent in a formulation mode, having the potential to be effective against a number of other diseases as well.
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Claims 6
Claim · model-written summary
The formulation significantly suppressed bacterial wilt in chilli.
- Taxon
- chillit0
- Treatment
- B. subtilis formulatione0
- Interactor
- Ralstonia solanacearum
Ralstonia solanacearume1pathogen - Second interactor
- B. subtilis
Bacillus subtilise0biocontrol_agent - Outcome
- bacterial wilte1
- Direction
- suppressivenesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In vivo efficacy of B. subtilis formulation (inclusive treatment involving seed treatment, seedling dip, soil treatment and foliar spray) showed significant suppressiveness against both the diseases”
e1“bacterial wilt (Ralstonia solanacearum) and anthracnose (Colletotrichum gloeosporioides)”
t0“chilli”
Claim · model-written summary
The formulation significantly suppressed anthracnose in chilli.
- Taxon
- chillit0
- Treatment
- B. subtilis formulatione0
- Interactor
- Colletotrichum gloeosporioides
Colletotrichum gloeosporioidese1pathogen - Second interactor
- B. subtilisBacillus subtilise0biocontrol_agent
- Outcome
- anthracnosee1
- Direction
- suppressivenesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In vivo efficacy of B. subtilis formulation (inclusive treatment involving seed treatment, seedling dip, soil treatment and foliar spray) showed significant suppressiveness against both the diseases”
e1“bacterial wilt (Ralstonia solanacearum) and anthracnose (Colletotrichum gloeosporioides)”
t0“chilli”
Claim · model-written summary
The formulation enhanced growth and yield attributes.
- Taxon
- chillit0
- Treatment
- B. subtilis formulatione1
- Interactor
- B. subtilisBacillus subtilise1biocontrol_agent
- Outcome
- growth and yield attributese0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“coupled with enhanced growth and yield attributes”
e1“In vivo efficacy of B. subtilis formulation”
t0“chilli”
Claim · model-written summary
The formulation gave 15.45% greater yield than standard chemicals over two years.
- Taxon
- chillit0
- Treatment
- Bacillus subtilis formulatione0
- Interactor
- Bacillus subtilisBacillus subtilise0biocontrol_agent
- Outcome
- yield gainse0
- Direction
- edged overe0
- Value
- 15.45%e0
- Comparator
- standard chemicalse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“field evaluation of Bacillus subtilis formulation comparing standard chemicals also edged over the latter by 15.45% in terms of yield gains in 2-years of study”
t0“chilli”
Claim · model-written summary
The formulation significantly reduced disease severity in field evaluation.
- Taxon
- chillit0
- Treatment
- Bacillus subtilis formulatione0
- Interactor
- Bacillus subtilisBacillus subtilise0biocontrol_agent
- Outcome
- disease severitye0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant reduction was found in disease severity during field evaluation of Bacillus subtilis formulation”
t0“chilli”
Claim · model-written summary
Defense enzymes were upregulated by 2.3–11.0 folds, mostly peaking in 24–72 h.
Verbatim
e0“upregulated synthesis of plant defense-enzymes (Polyphenol oxidase, peroxidase, phenylalanine ammonia-lyase, and β-1,3-glucanase) by 2.3–11.0 folds with their peaks mostly expressed within 24–72 h”
t0“chilli”
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See all 9 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.