Abstract
Grape powdery mildew (GPM) control is based on the preventive use of sulfur and curative application of synthetic fungicides, increasing the risk for producers’ health and environmental and fruit contamination. This work aimed to select Bacillus strains isolated from the Brazilian tropical semi-arid region that are effective antagonists to GPM. In an initial screening performed by spraying bacterial suspensions in detached grape leaves, six strains of Bacillus spp. showed disease symptom reduction higher than 70.0%. Two greenhouse experiments showed that the bacterial strains LCB03, LCB28, and LCB30 showed control efficiency >80%, statistically similar to a commercial formulation with Bacillus amyloliquefaciens QST713. 16s rDNA sequencing showed that strain LCB03 showed 100.0% homology to B. velezensis, while LCB28 has high homology to B. tequillensis (99.93%), and LCB30 had 99.71% homology with B. siamensis. As an average for both greenhouse experiments, weekly application of Bacillus sp LCB03, Bacillus sp LCB28, and Bacillus sp. LCB30 reduced the average incidence by around 50% and more than 80% for GPM severity.
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Claims 7
Claim · model-written summary
Six Bacillus strains reduced grape powdery mildew disease symptoms by more than 70.0% in an initial detached-leaf screening.
- Taxon
- grapee1
- Treatment
- spraying bacterial suspensionse1
- Interactor
- Erysiphe necator
Erysiphe necatort0pathogen - Second interactor
- Bacillus spp.e1biocontrol_agent
- Outcome
- disease symptom reductione1
- Direction
- highere1
- Value
- 70.0%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Selecting Bacillus strains antagonist to Erysiphe necator (Schw.) Burr. the causal agent of grape powdery mildew”
e1“In an initial screening performed by spraying bacterial suspensions in detached grape leaves, six strains of Bacillus spp. showed disease symptom reduction higher than 70.0%”
Claim · model-written summary
Strains LCB03, LCB28 and LCB30 showed greenhouse control efficiency above 80%, statistically similar to a commercial Bacillus amyloliquefaciens QST713 formulation.
- Taxon
- grapet0
- Treatment
- bacterial strains LCB03, LCB28, and LCB30e2
- Interactor
- Erysiphe necatorErysiphe necatort0pathogen
- Second interactor
- LCB03, LCB28, and LCB30e2biocontrol_agent
- Outcome
- control efficiencye2
- Direction
- statistically similare2
- Value
- >80%e2
- Comparator
- commercial formulation with Bacillus amyloliquefaciens QST713e2
- Setting
- greenhousee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Selecting Bacillus strains antagonist to Erysiphe necator (Schw.) Burr. the causal agent of grape powdery mildew”
e2“Two greenhouse experiments showed that the bacterial strains LCB03, LCB28, and LCB30 showed control efficiency >80%, statistically similar to a commercial formulation with Bacillus amyloliquefaciens QST713”
Claim · model-written summary
Strain LCB03 showed 100.0% 16S rDNA homology to Bacillus velezensis.
Verbatim
t0“Selecting Bacillus strains antagonist to Erysiphe necator (Schw.) Burr. the causal agent of grape powdery mildew”
e3“16s rDNA sequencing showed that strain LCB03 showed 100.0% homology to B. velezensis, while LCB28 has high homology to B. tequillensis (99.93%), and LCB30 had 99.71% homology with B. siamensis”
Claim · model-written summary
Strain LCB28 showed 99.93% 16S rDNA homology to Bacillus tequillensis.
Verbatim
t0“Selecting Bacillus strains antagonist to Erysiphe necator (Schw.) Burr. the causal agent of grape powdery mildew”
e3“16s rDNA sequencing showed that strain LCB03 showed 100.0% homology to B. velezensis, while LCB28 has high homology to B. tequillensis (99.93%), and LCB30 had 99.71% homology with B. siamensis”
Claim · model-written summary
Strain LCB30 showed 99.71% 16S rDNA homology to Bacillus siamensis.
Verbatim
t0“Selecting Bacillus strains antagonist to Erysiphe necator (Schw.) Burr. the causal agent of grape powdery mildew”
e3“16s rDNA sequencing showed that strain LCB03 showed 100.0% homology to B. velezensis, while LCB28 has high homology to B. tequillensis (99.93%), and LCB30 had 99.71% homology with B. siamensis”
Claim · model-written summary
Weekly application of Bacillus strains LCB03, LCB28 and LCB30 reduced the average grape powdery mildew incidence by around 50%.
- Taxon
- grapet0
- Treatment
- weekly application of Bacillus sp LCB03, Bacillus sp LCB28, and Bacillus sp. LCB30e4
- Interactor
- Erysiphe necatorErysiphe necatort0pathogen
- Second interactor
- Bacillus sp LCB03, Bacillus sp LCB28, and Bacillus sp. LCB30e4biocontrol_agent
- Outcome
- average incidencee4
- Direction
- reducede4
- Value
- around 50%e4
- Setting
- greenhouse experimentse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Selecting Bacillus strains antagonist to Erysiphe necator (Schw.) Burr. the causal agent of grape powdery mildew”
e4“As an average for both greenhouse experiments, weekly application of Bacillus sp LCB03, Bacillus sp LCB28, and Bacillus sp. LCB30 reduced the average incidence by around 50% and more than 80% for GPM severity”
Claim · model-written summary
Weekly application of Bacillus strains LCB03, LCB28 and LCB30 reduced grape powdery mildew severity by more than 80%.
- Taxon
- grapet0
- Treatment
- weekly application of Bacillus sp LCB03, Bacillus sp LCB28, and Bacillus sp. LCB30e4
- Interactor
- Erysiphe necatorErysiphe necatort0pathogen
- Second interactor
- Bacillus sp LCB03, Bacillus sp LCB28, and Bacillus sp. LCB30e4biocontrol_agent
- Outcome
- GPM severitye4
- Direction
- reducede4
- Value
- more than 80%e4
- Setting
- greenhouse experimentse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Selecting Bacillus strains antagonist to Erysiphe necator (Schw.) Burr. the causal agent of grape powdery mildew”
e4“As an average for both greenhouse experiments, weekly application of Bacillus sp LCB03, Bacillus sp LCB28, and Bacillus sp. LCB30 reduced the average incidence by around 50% and more than 80% for GPM severity”
The same questions in other papers
inoculation · Erysiphe necator · VitisPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
application · Erysiphe necator · VitisPositive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 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.