Abstract
AIMS: Five bacterial strains belonging to Bacillus subtilis, Pseudomonas fluorescens and Ps. corrugata and two fungal strains belonging to Trichoderma viride and Gliocladium virens were evaluated for their efficacy in controlling sugar beet and cucumber damping-off caused by Pythium ultimum. METHODS AND RESULTS: The in vitro antagonistic activity of bacteria against various Pythium spp. was evaluated with dual cultures in various media. Pseudomonas strains inhibited the pathogen better than Bacillus strains. To identify potentially useful antagonist combinations, dual compatibility of antagonists was also evaluated, based on growth in two liquid media containing substrate previously used by other antagonists. Four pairs of bacteria were selected. Sugar beet damping-off biocontrol was attempted with bacterial seed treatments (individually and in pairs). Cucumber damping-off biocontrol was attempted with bacterial seed treatments and bacterial and fungal compost treatments. In sugar beet, satisfactory biocontrol was only achieved with Pseudomonas antagonists. Antagonist combinations did not show any superior biocontrol ability to individual antagonists and compatibility of bacteria in vitro did not correlate with compatibility in vivo. Bacterial seed treatments and fungal compost treatments failed to control cucumber damping-off. Better biocontrol in cucumber was achieved when bacterial antagonists were applied by drenching or by coating seed with bacteria in a peat carrier. CONCLUSIONS: Pseudomonas antagonists were superior to Bacillus antagonists in controlling damping-off in cucumber and sugar beet. Pseudomonas peat inocula maintained a good shelf-life 2 years after preparation. SIGNIFICANCE AND IMPACT OF THE STUDY: Pseudomonas peat formulations have the potential for development into commercial biopesticides.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
In vitro, Pseudomonas strains inhibited Pythium better than Bacillus strains.
- Taxon
- cucumber
Cucumis sativust0 - Treatment
- Pseudomonas strainse0
- Outcome
- inhibited the pathogene0
- Direction
- bettere0
- Comparator
- Bacillus strainse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Biological control of cucumber and sugar beet damping-off”
e0“Pseudomonas strains inhibited the pathogen better than Bacillus strains”
Claim · model-written summary
In sugar beet, satisfactory biocontrol was achieved only with Pseudomonas antagonists.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarise1 - Treatment
- Pseudomonas antagonistse1
- Interactor
- Pseudomonas antagonistse1biocontrol_agent
- Outcome
- biocontrole1
- Direction
- achievede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Biological control of cucumber and sugar beet damping-off”
e1“In sugar beet, satisfactory biocontrol was only achieved with Pseudomonas antagonists”
Claim · model-written summary
Antagonist combinations did not show superior biocontrol ability to individual antagonists.
- Taxon
- cucumberCucumis sativust0
- Treatment
- Antagonist combinationse2
- Outcome
- biocontrol abilitye2
- Direction
- did not show any superiore2
- Comparator
- individual antagonistse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Biological control of cucumber and sugar beet damping-off”
e2“Antagonist combinations did not show any superior biocontrol ability to individual antagonists”
Claim · model-written summary
In vitro bacterial compatibility did not correlate with in vivo compatibility.
- Taxon
- cucumberCucumis sativust0
- Outcome
- compatibility of bacteria in vitroe3
- Direction
- no_changeinferrede3
- Comparator
- compatibility in vivoe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Biological control of cucumber and sugar beet damping-off”
e3“compatibility of bacteria in vitro did not correlate with compatibility in vivo”
Claim · model-written summary
Bacterial seed treatments and fungal compost treatments failed to control cucumber damping-off.
- Taxon
- cucumberCucumis sativuse4
- Treatment
- Bacterial seed treatments and fungal compost treatmentse4
- Outcome
- damping-offe4
- Direction
- failed to controle4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Biological control of cucumber and sugar beet damping-off”
e4“Bacterial seed treatments and fungal compost treatments failed to control cucumber damping-off”
Claim · model-written summary
Biocontrol in cucumber was better when bacterial antagonists were applied by drenching.
- Taxon
- cucumberCucumis sativuse5
- Treatment
- applied by drenchinge5
- Outcome
- biocontrole5
- Direction
- Bettere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Biological control of cucumber and sugar beet damping-off”
e5“Better biocontrol in cucumber was achieved when bacterial antagonists were applied by drenching or by coating seed with bacteria in a peat carrier”
Claim · model-written summary
Biocontrol in cucumber was better when bacterial antagonists were applied by coating seed in a peat carrier.
- Taxon
- cucumberCucumis sativuse5
- Treatment
- by coating seed with bacteria in a peat carriere5
- Outcome
- biocontrole5
- Direction
- Bettere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Biological control of cucumber and sugar beet damping-off”
e5“Better biocontrol in cucumber was achieved when bacterial antagonists were applied by drenching or by coating seed with bacteria in a peat carrier”
Claim · model-written summary
Pseudomonas antagonists were superior to Bacillus antagonists in controlling damping-off in cucumber and sugar beet.
- Taxon
- cucumber and sugar beetBeta vulgaris subsp. vulgarisCucumis sativuse6
- Treatment
- Pseudomonas antagonistse6
- Outcome
- controlling damping-offe6
- Direction
- superiore6
- Comparator
- Bacillus antagonistse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Biological control of cucumber and sugar beet damping-off”
e6“Pseudomonas antagonists were superior to Bacillus antagonists in controlling damping-off in cucumber and sugar beet”
Claim · model-written summary
Pseudomonas peat inocula kept a good shelf-life of 2 years after preparation.
Not reportedTaxon
Verbatim
e7“Pseudomonas peat inocula maintained a good shelf-life 2 years after preparation”
Claim · model-written summary
Pseudomonas peat formulations have potential for development into commercial biopesticides.
- Outcome
- commercial biopesticidese7
Not reportedTaxon
Verbatim
e7“Pseudomonas peat formulations have the potential for development into commercial biopesticides”
The same questions in other papers
Pseudomonas · disease · Cucumis sativus (cucumber)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
Pseudomonas · disease · Beta vulgaris (beet)Results agree
2 papers in the same direction as this paper
- positive
- positive
seed treatment · disease · Cucumis sativus (cucumber)Positive and negative results
1 paper in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- positive
5 papers more in this group
See all 9 papers →biocontrol · disease · Cucumis sativus (cucumber)Positive and negative results
14 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
13 papers more in this group
See all 17 papers →fertilization · disease · Cucumis sativus (cucumber)Positive and negative results
4 papers in the same direction as this paper · 40 in the opposite direction
- positive
- positive
- positive
41 papers more in this group
See all 45 papers →biocontrol · disease · Beta vulgaris (beet)Results agree
2 papers in the same direction as this paper
- positive
- 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.