Abstract
The expansion of organic agriculture has increased the demand for alternatives to chemical fertilizers and pesticides.Biopesticides and biofertilizers are part of a set of natural-based products being widely use to enrich the quality of the soil and control pests.In this study, a series of greenhouse and field bioassays were carried out with the aim of determining the biocontrol and biofertilizer effects of treatments prepared with Mitsuaria sp.strain H24L5A and Burkholderia sp.strain R4F2 in comparison with a commerciallyavailable Streptomyces inoculant on plants.Additionally, the effects of an experimental algae-based biofertilizer and commercial and pre-commercial biofertilizer products were assessed.First, a bioassay method was developed to successfully detect plant growth promotion and reduction of disease severity when the different treatments were applied by drenching.At a concentration of 10 7 cells/ml, Mitsuaria sp.provided the greatest biocontrol of bacterial leaf spot (P< 0.05) with a 39% reduction as compared to the negative control in tomato greenhouse bioassays.Although not statistically significant, field experiments showed a trend also indicating a 12% reduction in bacterial leaf spot by Mitsuaria sp.. Mitsuaria sp. and Burkholderia sp.treatments provided the greatest enhancements of shoot growth and biomass (P < 0.05) up to 64% as compared to the negative controls in tomato greenhouse bioassays.These data indicate the biocontrol and plant growth promoting activities of the experimental bacterial ingredients.Furthermore, the results indicated that these unformulated inoculants have utility comparable to that of iv commercial formulations.This is the first report of Mitsuaria sp.strain H24L5A and Burkholderia sp.strain R4F2 as biocontrol agents of bacterial leaf spot and plant growth promotion agents of tomato and wheat.
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Claims 4
Claim · model-written summary
Mitsuaria reduced bacterial leaf spot by 39% relative to the negative control in tomato greenhouse bioassays.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- Mitsuaria sp.e0
- Interactor
- Mitsuaria sp.Roseatelese0biocontrol_agent
- Outcome
- bacterial leaf spote0
- Direction
- reductione0
- Value
- 39%e0
- Comparator
- negative controle0
- Setting
- greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At a concentration of 10 7 cells/ml, Mitsuaria sp.provided the greatest biocontrol of bacterial leaf spot (P< 0.05) with a 39% reduction as compared to the negative control in tomato greenhouse bioassays”
Claim · model-written summary
Mitsuaria enhanced tomato shoot growth and biomass relative to negative controls.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Mitsuaria sp.e0
- Interactor
- Mitsuaria sp.Roseatelese0symbiont
- Outcome
- shoot growth and biomasse0
- Direction
- enhancementse0
- Value
- up to 64%e0
- Comparator
- negative controlse0
- Setting
- greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mitsuaria sp. and Burkholderia sp.treatments provided the greatest enhancements of shoot growth and biomass (P < 0.05) up to 64% as compared to the negative controls in tomato greenhouse bioassays”
Claim · model-written summary
Burkholderia enhanced tomato shoot growth and biomass relative to negative controls.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Burkholderia sp.e0
- Interactor
- Burkholderia sp.
Burkholderiae0symbiont - Outcome
- shoot growth and biomasse0
- Direction
- enhancementse0
- Value
- up to 64%e0
- Comparator
- negative controlse0
- Setting
- greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mitsuaria sp. and Burkholderia sp.treatments provided the greatest enhancements of shoot growth and biomass (P < 0.05) up to 64% as compared to the negative controls in tomato greenhouse bioassays”
Claim · model-written summary
Unformulated inoculants had utility comparable to commercial formulations.
- Taxon
- tomatoSolanum lycopersicume1
- Outcome
- utilitye0
- Direction
- comparablee0
- Comparator
- commercial formulationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these unformulated inoculants have utility comparable to that of iv commercial formulations”
e1“tomato and wheat”
The same questions in other papers
Burkholderia · growth · Solanum lycopersicum (tomato)Results agree
1 paper in the same direction as this paper
- positive
Roseateles · disease · Solanum lycopersicum (tomato)Results agree
1 paper in the same direction as this paper
- positive
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.