Abstract
Blast disease (caused by Magnaporthe oryzae) is the most damaging disease to rice, and synthetic fungicides has been the primary means of control, however, concerns have been raised about the health risks posed, hence, the need for alternative biological crop protection strategies. This study evaluate the antifungal efficacy of chitosan against blast pathogenic fungi on rice field. Three chitosan (High, Medium and Low Molecular Weight) were purchased while the fourth Chitosan was synthesized from crab shell (CSCS). Faro 52 rice variety was collected from National Cereal Research Institute, Badeggi and Planted on Hydromorphic field. The degree of deacetylation of the synthesized chitosan was 98%. The rice field was inoculated with M. oryzae and treated with chitosan at two weeks after transplanting. The blast severity and incidence and other agronomic data were taken and data were analyzed using Analysis of Variance (ANAOVA) and means separated using Duncan multiple range test (DMRT). Results reveals that blast severity of 6,(highly susceptible) 5, (moderately susceptible) 4(susceptible) and incidence of 28.3%, 20%, 20% and 24.3% in rice plant tag with MMWC1.5%, 1HMWC 2.0%, LMWC2.0% and CSCS 2.0% before treatment with chitosan was observed. However, the severity reduce to 1(resistance) in all and incidence of 9.3%, 2.3%, 1.0% and 2.0% respectively at the end of the treatment. There was no significant difference (P≤0.05) in all other agronomic parameters except for panicle count with highest value (8.53) in HMWC 2.0% and lowest value (5.80) in HMWC 0.5%. Similarly, significant difference was observed in grain yield per plot with highest yield of 717 gram in HMWC 2.0% treated plot while the lowest yield of 190 gram was observed in MMWC 0.5% which was significantly different. It may therefore be concluded that chitosan treatment reduce the severity and incidence of blast pathogen as well as increase grain yield.
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Claims 6
Claim · model-written summary
Initial blast severity and incidence varied across four assigned chitosan groups before treatment.
- Taxon
- rice
Oryza sativae0 - Interactor
- blaste0pathogen
- Outcome
- blast severitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results reveals that blast severity of 6,(highly susceptible) 5, (moderately susceptible) 4(susceptible) and incidence of 28.3%, 20%, 20% and 24.3% in rice plant tag with MMWC1.5%, 1HMWC 2.0%, LMWC2.0% and CSCS 2.0% before treatment with chitosan was observed”
Claim · model-written summary
Blast severity fell to a resistance score of 1 in all chitosan groups.
- Taxon
- RiceOryza sativat0
- Treatment
- chitosane1
- Interactor
- Magnaporthe oryzae
Pyricularia oryzaet0pathogen - Outcome
- severitye0
- Direction
- reducee0
- Value
- 1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, the severity reduce to 1(resistance) in all and incidence of 9.3%, 2.3%, 1.0% and 2.0% respectively at the end of the treatment”
t0“Blast Pathogenic Fungi (Magnaporthe oryzae) on Rice (Oryzasativa)”
e1“treated with chitosan at two weeks after transplanting”
Claim · model-written summary
Blast incidence at the end of chitosan treatment was 9.3%, 2.3%, 1.0%, and 2.0% across the four groups, respectively.
- Taxon
- RiceOryza sativat0
- Treatment
- chitosane1
- Interactor
- Magnaporthe oryzaePyricularia oryzaet0pathogen
- Outcome
- incidencee0
- Value
- 9.3%, 2.3%, 1.0% and 2.0%e0
- Comparator
- before treatment with chitosane1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“incidence of 9.3%, 2.3%, 1.0% and 2.0% respectively at the end of the treatment”
e1“MMWC1.5%, 1HMWC 2.0%, LMWC2.0% and CSCS 2.0% before treatment with chitosan”
t0“Blast Pathogenic Fungi (Magnaporthe oryzae) on Rice (Oryzasativa)”
Claim · model-written summary
Other agronomic parameters showed no significant differences apart from panicle count.
- Taxon
- RiceOryza sativat0
- Outcome
- other agronomic parameterse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no significant difference (P≤0.05) in all other agronomic parameters except for panicle count”
t0“Rice (Oryzasativa)”
Claim · model-written summary
Panicle count was highest at 8.53 under HMWC 2.0% and lowest at 5.80 under HMWC 0.5%.
- Taxon
- RiceOryza sativat0
- Treatment
- HMWC 2.0%e0
- Outcome
- panicle counte0
- Direction
- higheste0
- Value
- 8.53e0
- Qualifier
- 5.80e0
- Comparator
- HMWC 0.5%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“panicle count with highest value (8.53) in HMWC 2.0% and lowest value (5.80) in HMWC 0.5%”
t0“Rice (Oryzasativa)”
Claim · model-written summary
Grain yield per plot was highest at 717 gram under HMWC 2.0%, compared with 190 gram under MMWC 0.5%.
- Taxon
- RiceOryza sativat0
- Treatment
- HMWC 2.0%e0
- Outcome
- grain yield per plote0
- Direction
- higheste0
- Value
- 717 grame0
- Qualifier
- 190 grame0
- Comparator
- MMWC 0.5%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant difference was observed in grain yield per plot with highest yield of 717 gram in HMWC 2.0% treated plot while the lowest yield of 190 gram was observed in MMWC 0.5% which was significantly different”
t0“Rice (Oryzasativa)”
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 →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.