Abstract
Objective: Biopesticides are safe and environment friendly. We evaluated the biocontrol effect of Pythium oligandrum broth (POB) and its toxicity to animals and plant growth. Methods: Animal, antagonist, pot, and field experiments with mice, Mycosphaerella melonis, and cucumber seedlings were carried out to study animal toxicity, control of gummy stem blight, plant growth, fruit yield and quality with POB produced from self-isolated P. oligandrum CQ2010. Results: Mouse showed normal weight, appearances, performances and no pathogenic changes in organs and tissues with a large amount of POB supplied by lavage. The inhibition rate of POB against M. melonis was 51.95%, similar to thiophanate methy (800 times dilution) but much higher than chlorothalonil (200 times dilution). Malondialdehyde concentration was reduced whereas activities of peroxidase and superoxide dismutase were stimulated in seedling leaves irrespective of POB supplied before and after pathogenic inoculation. POB also decreased the pathogenic incidence and disease index with relative control efficacy from 54.8% to 64.1%. Thus, POB could alleviate cell membrane damage caused by pathogenic microbes, stimulate physiological reactions related to disease defense, and increase disease-resistant abilities of plants. Moreover, POB increased chlorophyll content, root activity, and uptake of nitrogen, phosphorus and potassium, resulting in growth acceleration, fruit yield increment, and quality improvement. Conclusion: POB is safe to animals and could control gummy stem blight of cucumber seedlings, promote plant growth, increase fruit yield, and improve the qualities.
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 6
Claim · model-written summary
The broth inhibited M. melonis by 51.95%, similar to thiophanate methy and higher than chlorothalonil.
- Taxon
- cucumber seedlings
Cucumis sativuse1 - Treatment
- POBe0
- Interactor
- M. melonise0pathogen
- Outcome
- inhibition rate of POB against M. melonise0
- Direction
- much highere0
- Value
- 51.95%e0
- Comparator
- thiophanate methye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibition rate of POB against M. melonis was 51.95%, similar to thiophanate methy (800 times dilution) but much higher than chlorothalonil (200 times dilution).”
e1“and cucumber seedlings were carried out”
Claim · model-written summary
The broth reduced malondialdehyde concentration in seedling leaves.
- Taxon
- cucumber seedlingsCucumis sativuse1
- Organ / stage
- seedling leavese0
- Treatment
- POBe0
- Outcome
- Malondialdehyde concentratione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Malondialdehyde concentration was reduced whereas activities of peroxidase and superoxide dismutase were stimulated in seedling leaves irrespective of POB supplied before and after pathogenic inoculation.”
e1“and cucumber seedlings were carried out”
Claim · model-written summary
The broth stimulated peroxidase and superoxide dismutase activities in seedling leaves.
- Taxon
- cucumber seedlingsCucumis sativuse1
- Organ / stage
- seedling leavese0
- Treatment
- POBe0
- Outcome
- activities of peroxidase and superoxide dismutasee0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Malondialdehyde concentration was reduced whereas activities of peroxidase and superoxide dismutase were stimulated in seedling leaves irrespective of POB supplied before and after pathogenic inoculation.”
e1“and cucumber seedlings were carried out”
Claim · model-written summary
The broth decreased pathogenic incidence and disease index, with 54.8% to 64.1% relative control efficacy.
- Taxon
- cucumber seedlingsCucumis sativuse1
- Treatment
- POBe0
- Outcome
- pathogenic incidence and disease indexe0
- Direction
- decreasede0
- Value
- 54.8% to 64.1%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POB also decreased the pathogenic incidence and disease index with relative control efficacy from 54.8% to 64.1%.”
e1“and cucumber seedlings were carried out”
Claim · model-written summary
The broth increased chlorophyll content, root activity, and nitrogen, phosphorus and potassium uptake.
- Taxon
- cucumber seedlingsCucumis sativuse1
- Treatment
- POBe0
- Outcome
- chlorophyll content, root activity, and uptake of nitrogen, phosphorus and potassiume0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POB increased chlorophyll content, root activity, and uptake of nitrogen, phosphorus and potassium”
e1“and cucumber seedlings were carried out”
Claim · model-written summary
The broth accelerated growth and increased fruit yield and quality.
- Taxon
- cucumber seedlingsCucumis sativuse2
- Treatment
- POBe1
- Outcome
- growth acceleration, fruit yield increment, and quality improvemente0
- Direction
- incremente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resulting in growth acceleration, fruit yield increment, and quality improvement”
e1“POB increased chlorophyll content”
e2“and cucumber seedlings were carried out”
The same questions in other papers
Pythium oligandrum · disease · Cucumis sativus (cucumber)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.