Abstract
The antifungal potential of chitosan obtained from shellfish was studied in both in vitro and in vivo conditions against Pyricularia oryzae and Rhizoctonia solani, causal agents of the blast and sheath blight diseases in rice, respectively. A total of 100% inhibition of mycelial growth was observed on both P. oryzae and R. solani when a 4% concentration of chitosan was used in this study. A significant reduction in both disease incidence and disease severity was observed between the treated and untreated rice plants. The disease controlling efficacy of chitosan was concentration-dependent with a negative correlation. The disease reduction (DR) capacity of chitosan in this study ranged between 47-95%. Chitosan was able to reduce disease severity (DS) of blast by 85% and sheath blight by 95% while disease incidence (DI) of blast by 77% and sheath blight by 89%. The results demonstrated that chitosan extracted from shellfish has the potential to be developed as a biopesticide for sustainable control of both blast and sheath blight diseases in rice and has broad-spectrum capacity in controlling both diseases.
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Claims 11
Claim · model-written summary
Four-percent chitosan completely inhibited P. oryzae mycelial growth.
- Taxon
- rice (Oryza sativa)
Oryza sativat0 - Treatment
- 4% concentration of chitosane0
- Interactor
- P. oryzae
Pyricularia oryzaee0pathogen - Outcome
- mycelial growthe0
- Direction
- inhibitione0
- Value
- 100%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A total of 100% inhibition of mycelial growth was observed on both P. oryzae and R. solani when a 4% concentration of chitosan was used in this study.”
t0“rice (Oryza sativa)”
Claim · model-written summary
Four-percent chitosan completely inhibited R. solani mycelial growth.
- Taxon
- rice (Oryza sativa)Oryza sativat0
- Treatment
- 4% concentration of chitosane0
- Interactor
- R. solani
Rhizoctonia solanie0pathogen - Outcome
- mycelial growthe0
- Direction
- inhibitione0
- Value
- 100%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A total of 100% inhibition of mycelial growth was observed on both P. oryzae and R. solani when a 4% concentration of chitosan was used in this study.”
t0“rice (Oryza sativa)”
Claim · model-written summary
Chitosan significantly reduced disease incidence in treated versus untreated rice.
- Taxon
- riceOryza sativae0
- Treatment
- treatede0
- Outcome
- disease incidencee0
- Direction
- reductione0
- Comparator
- untreatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant reduction in both disease incidence and disease severity was observed between the treated and untreated rice plants.”
Claim · model-written summary
Chitosan significantly reduced disease severity in treated versus untreated rice.
- Taxon
- riceOryza sativae0
- Treatment
- treatede0
- Outcome
- disease severitye0
- Direction
- reductione0
- Comparator
- untreatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant reduction in both disease incidence and disease severity was observed between the treated and untreated rice plants.”
Claim · model-written summary
Chitosan disease-control efficacy was negatively correlated with concentration.
- Taxon
- rice (Oryza sativa)Oryza sativat0
- Treatment
- chitosane0
- Outcome
- disease controlling efficacye0
- Direction
- negative correlatione0
- Qualifier
- concentration-dependente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The disease controlling efficacy of chitosan was concentration-dependent with a negative correlation.”
t0“rice (Oryza sativa)”
Claim · model-written summary
Chitosan disease reduction ranged from 47% to 95%.
- Taxon
- rice (Oryza sativa)Oryza sativat0
- Treatment
- chitosane0
- Outcome
- disease reduction (DR) capacitye0
- Value
- 47-95%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The disease reduction (DR) capacity of chitosan in this study ranged between 47-95%.”
t0“rice (Oryza sativa)”
Claim · model-written summary
Chitosan reduced rice blast severity by 85%.
- Taxon
- rice (Oryza sativa)Oryza sativat0
- Treatment
- Chitosane0
- Interactor
- Pyricularia oryzaePyricularia oryzaet0pathogen
- Outcome
- disease severity (DS) of blaste0
- Direction
- reducee0
- Value
- 85%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chitosan was able to reduce disease severity (DS) of blast by 85% and sheath blight by 95% while disease incidence (DI) of blast by 77% and sheath blight by 89%.”
t0“Chitosan as a biopesticide against rice (Oryza sativa) fungal pathogens, Pyricularia oryzae and Rhizoctonia solani”
Claim · model-written summary
Chitosan reduced rice sheath-blight severity by 95%.
- Taxon
- rice (Oryza sativa)Oryza sativat0
- Treatment
- Chitosane0
- Interactor
- Rhizoctonia solaniRhizoctonia solanit0pathogen
- Outcome
- sheath blighte0
- Direction
- reducee0
- Value
- 95%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chitosan was able to reduce disease severity (DS) of blast by 85% and sheath blight by 95% while disease incidence (DI) of blast by 77% and sheath blight by 89%.”
t0“Chitosan as a biopesticide against rice (Oryza sativa) fungal pathogens, Pyricularia oryzae and Rhizoctonia solani”
Claim · model-written summary
Chitosan reduced rice blast incidence by 77%.
- Taxon
- rice (Oryza sativa)Oryza sativat0
- Treatment
- Chitosane0
- Interactor
- Pyricularia oryzaePyricularia oryzaet0pathogen
- Outcome
- disease incidence (DI) of blaste0
- Direction
- reducee0
- Value
- 77%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chitosan was able to reduce disease severity (DS) of blast by 85% and sheath blight by 95% while disease incidence (DI) of blast by 77% and sheath blight by 89%.”
t0“Chitosan as a biopesticide against rice (Oryza sativa) fungal pathogens, Pyricularia oryzae and Rhizoctonia solani”
Claim · model-written summary
Chitosan reduced rice sheath-blight incidence by 89%.
- Taxon
- rice (Oryza sativa)Oryza sativat0
- Treatment
- Chitosane0
- Interactor
- Rhizoctonia solaniRhizoctonia solanit0pathogen
- Outcome
- sheath blighte0
- Direction
- reducee0
- Value
- 89%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chitosan was able to reduce disease severity (DS) of blast by 85% and sheath blight by 95% while disease incidence (DI) of blast by 77% and sheath blight by 89%.”
t0“Chitosan as a biopesticide against rice (Oryza sativa) fungal pathogens, Pyricularia oryzae and Rhizoctonia solani”
Claim · model-written summary
The authors identified shellfish-derived chitosan as a potential broad-spectrum biopesticide for rice blast and sheath blight.
- Taxon
- riceOryza sativae0
- Treatment
- chitosan extracted from shellfishe0
- Outcome
- potential to be developed as a biopesticidee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chitosan extracted from shellfish has the potential to be developed as a biopesticide for sustainable control of both blast and sheath blight diseases in rice and has broad-spectrum capacity in controlling both diseases.”
The same questions in other papers
chitosan · Pyricularia oryzae · Oryza sativa (rice)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →chitosan · Rhizoctonia solani · Oryza sativa (rice)Results agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 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.