Paper · 2025 · Plant Protection

Effectiveness of certain biological agents and chemical inducers in controlling fungi responsible for root rot disease in eggplant (Solanum melongena L.)

Rehab Adil A. AL-Ajeely; Ahed Abd Ali Hadi Matloob

13
claims
22
verbatim quotes
1
citations
2
research areas
✓
Open access

Abstract

Eggplant root rot is a serious disease affecting crop production in Babylon Province, prompting this study to investigate the incidence, causal fungi, and potential biological control methods. The results from the surveyed fields revealed that eggplant root rot was present in all regions surveyed, with infection rates ranging from 20% to 100% and infection severity ranging from 5% to 60%. Several fungi were isolated from the roots of eggplants affected by root rot. The majority of isolates belonged to Fusarium solani, which was found in 7 areas of the surveyed field with an incidence rate of 74.14%, followed by Rhizoctonia solani with an incidence rate of 36.2%. Pathogenicity tests showed that these fungal isolates infected eggplant seeds. The study also showed that Pseudomonas fluorescens inhibited the growth of both R. solani and F. solani on PDA medium, with the inhibition rate reaching 100%. Furthermore, the addition of chitosan to the culture medium at all tested concentrations also inhibited the growth of both fungi. At concentrations of 5%, 10%, and 15%, the inhibition rate was particularly high, and the inhibitory effect of chitosan increased with rising concentration. Results from the greenhouse experiment indicated that all treatments, including P. fluorescens, chitosan, and their combination, significantly reduced both the infection rate and the severity of root rot. Moreover, these treatments contributed to improved growth parameters of the eggplant plants. These findings demonstrate that P. fluorescens and chitosan, alone or combined, effectively control eggplant root rot and enhance plant growth in Babylon Province.

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Claims 13

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Eggplant root rot occurred in every surveyed region.

Taxon
eggplantSolanum melongenae0
Outcome
root rot was present in all regions surveyede0
Setting
Babylon Provincee1

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum melongena
Solanum melongena · TaxonBeraDigle · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“eggplant root rot was present in all regions surveyed, with infection rates ranging from 20% to 100% and infection severity ranging from 5% to 60%.”

✓ located verbatim in the source · abstract, characters 244–391 · show in text ↑
e1

“production in Babylon Province”

✓ located verbatim in the source · abstract, characters 54–84 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Eggplant root rot infection rates ranged from 20% to 100%.

Taxon
eggplantSolanum melongenae0
Outcome
infection ratese0
Value
20% to 100%e0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum melongena
Solanum melongena · TaxonBeraDigle · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“eggplant root rot was present in all regions surveyed, with infection rates ranging from 20% to 100%”

✓ located verbatim in the source · abstract, characters 244–344 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Eggplant root rot severity ranged from 5% to 60%.

Taxon
eggplantSolanum melongenae0
Outcome
infection severitye0
Value
5% to 60%e0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum melongena
Solanum melongena · TaxonBeraDigle · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“eggplant root rot was present in all regions surveyed, with infection rates ranging from 20% to 100% and infection severity ranging from 5% to 60%.”

✓ located verbatim in the source · abstract, characters 244–391 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Fusarium solani was the majority eggplant root isolate, found in seven areas at 74.14% incidence.

Taxon
eggplantsSolanum melongenae1
Interactor
Fusarium solaniFusarium solanie0pathogen
Outcome
Fusarium solanie0
Value
74.14%e0
Qualifier
7 arease0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum melongena
Solanum melongena · TaxonBeraDigle · CC BY-SA 4.0 · Wikimedia Commons ↗
Fusarium solani
Fusarium solani · InteractorFred Brooks from United States University of Hawaii at Manoa · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The majority of isolates belonged to Fusarium solani, which was found in 7 areas of the surveyed field with an incidence rate of 74.14%”

✓ located verbatim in the source · abstract, characters 470–605 · show in text ↑
e1

“roots of eggplants affected by root rot”

✓ located verbatim in the source · abstract, characters 429–468 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Rhizoctonia solani had 36.2% incidence among fungi isolated from affected eggplant roots.

Taxon
eggplantsSolanum melongenae1
Interactor
Rhizoctonia solaniRhizoctonia solanie0pathogen
Outcome
Rhizoctonia solanie0
Value
36.2%e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum melongena
Solanum melongena · TaxonBeraDigle · CC BY-SA 4.0 · Wikimedia Commons ↗
Rhizoctonia solani
Rhizoctonia solani · Interactoranonimowy, niektóre prawa zastrzeżone (CC BY) · CC BY 4.0 · iNaturalist ↗

Verbatim

e0

“followed by Rhizoctonia solani with an incidence rate of 36.2%.”

✓ located verbatim in the source · abstract, characters 607–670 · show in text ↑
e1

“roots of eggplants affected by root rot”

✓ located verbatim in the source · abstract, characters 429–468 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

The isolated fungi infected eggplant seeds in pathogenicity tests.

Taxon
eggplantSolanum melongenae0
Outcome
infected eggplant seedse0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum melongena
Solanum melongena · TaxonBeraDigle · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Pathogenicity tests showed that these fungal isolates infected eggplant seeds.”

✓ located verbatim in the source · abstract, characters 671–749 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Pseudomonas fluorescens inhibited Rhizoctonia solani growth completely on PDA.

Taxon
eggplantSolanum melongenae1
Treatment
Pseudomonas fluorescense0
Interactor
R. solaniRhizoctonia solanie0pathogen
Second interactor
Pseudomonas fluorescensPseudomonas fluorescense0biocontrol_agent
Outcome
growth of both R. solani and F. solanie0
Direction
inhibitede0
Value
100%e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum melongena
Solanum melongena · TaxonBeraDigle · CC BY-SA 4.0 · Wikimedia Commons ↗
Rhizoctonia solani
Rhizoctonia solani · Interactoranonimowy, niektóre prawa zastrzeżone (CC BY) · CC BY 4.0 · iNaturalist ↗
Pseudomonas fluorescens
Pseudomonas fluorescens · Second interactorNinjatacoshell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Pseudomonas fluorescens inhibited the growth of both R. solani and F. solani on PDA medium, with the inhibition rate reaching 100%.”

✓ located verbatim in the source · abstract, characters 777–908 · show in text ↑
e1

“Eggplant root rot is a serious disease”

✓ located verbatim in the source · abstract, characters 0–38 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Pseudomonas fluorescens inhibited Fusarium solani growth completely on PDA.

Taxon
eggplantSolanum melongenae1
Treatment
Pseudomonas fluorescense0
Interactor
F. solaniFusarium solanie0pathogen
Second interactor
Pseudomonas fluorescensPseudomonas fluorescense0biocontrol_agent
Outcome
growth of both R. solani and F. solanie0
Direction
inhibitede0
Value
100%e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum melongena
Solanum melongena · TaxonBeraDigle · CC BY-SA 4.0 · Wikimedia Commons ↗
Fusarium solani
Fusarium solani · InteractorFred Brooks from United States University of Hawaii at Manoa · CC BY 3.0 us · Wikimedia Commons ↗
Pseudomonas fluorescens
Pseudomonas fluorescens · Second interactorNinjatacoshell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Pseudomonas fluorescens inhibited the growth of both R. solani and F. solani on PDA medium, with the inhibition rate reaching 100%.”

✓ located verbatim in the source · abstract, characters 777–908 · show in text ↑
e1

“Eggplant root rot is a serious disease”

✓ located verbatim in the source · abstract, characters 0–38 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Chitosan inhibited growth of both root rot fungi at all tested concentrations, increasingly as concentration rose.

Taxon
eggplantSolanum melongenae1
Treatment
chitosane0
Outcome
growth of both fungie0
Direction
inhibitede0
Qualifier
5%, 10%, and 15%e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum melongena
Solanum melongena · TaxonBeraDigle · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“the addition of chitosan to the culture medium at all tested concentrations also inhibited the growth of both fungi. At concentrations of 5%, 10%, and 15%, the inhibition rate was particularly high, and the inhibitory effect of chitosan increased with rising concentration.”

✓ located verbatim in the source · abstract, characters 922–1195 · show in text ↑
e1

“Eggplant root rot is a serious disease”

✓ located verbatim in the source · abstract, characters 0–38 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Greenhouse Pseudomonas fluorescens significantly reduced eggplant root rot infection rate and severity.

Taxon
eggplantSolanum melongenae1
Treatment
P. fluorescense0
Interactor
P. fluorescensPseudomonas fluorescense0biocontrol_agent
Outcome
infection rate and the severity of root rote0
Direction
reducede0
Setting
greenhousee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum melongena
Solanum melongena · TaxonBeraDigle · CC BY-SA 4.0 · Wikimedia Commons ↗
Pseudomonas fluorescens
Pseudomonas fluorescens · InteractorNinjatacoshell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Results from the greenhouse experiment indicated that all treatments, including P. fluorescens, chitosan, and their combination, significantly reduced both the infection rate and the severity of root rot.”

✓ located verbatim in the source · abstract, characters 1196–1400 · show in text ↑
e1

“eggplant plants”

✓ located verbatim in the source · abstract, characters 1477–1492 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Greenhouse chitosan significantly reduced eggplant root rot infection rate and severity.

Taxon
eggplantSolanum melongenae1
Treatment
chitosane0
Outcome
infection rate and the severity of root rote0
Direction
reducede0
Setting
greenhousee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum melongena
Solanum melongena · TaxonBeraDigle · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Results from the greenhouse experiment indicated that all treatments, including P. fluorescens, chitosan, and their combination, significantly reduced both the infection rate and the severity of root rot.”

✓ located verbatim in the source · abstract, characters 1196–1400 · show in text ↑
e1

“eggplant plants”

✓ located verbatim in the source · abstract, characters 1477–1492 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Greenhouse combination treatment significantly reduced eggplant root rot infection rate and severity.

Taxon
eggplantSolanum melongenae1
Treatment
their combinatione0
Outcome
infection rate and the severity of root rote0
Direction
reducede0
Setting
greenhousee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum melongena
Solanum melongena · TaxonBeraDigle · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Results from the greenhouse experiment indicated that all treatments, including P. fluorescens, chitosan, and their combination, significantly reduced both the infection rate and the severity of root rot.”

✓ located verbatim in the source · abstract, characters 1196–1400 · show in text ↑
e1

“eggplant plants”

✓ located verbatim in the source · abstract, characters 1477–1492 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The greenhouse treatments improved eggplant growth parameters.

Taxon
eggplantSolanum melongenae0
Treatment
these treatmentse0
Outcome
growth parameterse0
Direction
improvede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum melongena
Solanum melongena · TaxonBeraDigle · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“these treatments contributed to improved growth parameters of the eggplant plants.”

✓ located verbatim in the source · abstract, characters 1411–1493 · show in text ↑

Pseudomonas fluorescens · disease · Solanum melongena (eggplant)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

chitosan · growth · Solanum melongena (eggplant)Results agree

5 papers: 5 positive, 0 negative or no effect

4 papers in the same direction as this paper

  1. positive
  2. positive
  3. 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.