Abstract
Blast disease caused by Magnaporthe sp. is one of the most destructive diseases in cereal crops. Disease infection was studied in farmer fields. Field data was recorded and further information was gathered by interviewing the farmers and agrarian extension officers. Blast infections were assessed in the fields using a standard evaluation system for rice (SES IRRI, 1996). Although symptoms were not observed in seedlings when mature rice fields were infected farmers experienced 100% yield loss. There were no or few leaf symptoms in blast infected mature rice fields yet neck infections were scored as 9 in SES. Unlike rice, leaf blast at seedling stage caused economic losses in finger millet. Mature finger millet fields were susceptible to neck and finger blast. Due to rapid disease development curative fungicide treatment was ineffective in controlling blast. Farmers reported sudden changes in the weather during infections whereby gloomy weather caused a spike in humidity and low temperatures that coincided with the infection. Host susceptibility window synchronized with conducive environments result in severe blast infections therefore, blast disease management needs a coordinated effort and system level interventions whereby control measures and use of resistant germplasm can be combined with climate-based disease predictions to increase the efficiency of disease control.
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Claims 8
Claim · model-written summary
Infected mature rice fields suffered 100% yield loss, although seedlings showed no symptoms.
- Taxon
- rice
Oryza sativae1 - Outcome
- yield losse1
- Value
- 100%e1
- Qualifier
- when mature rice fields were infectede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Although symptoms were not observed in seedlings when mature rice fields were infected farmers experienced 100% yield loss”
Claim · model-written summary
Infected mature rice fields had neck infections scored 9 on the SES scale, with few or no leaf symptoms.
- Taxon
- riceOryza sativae2
- Outcome
- neck infectionse2
- Value
- 9e2
- Qualifier
- no or few leaf symptomse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“There were no or few leaf symptoms in blast infected mature rice fields yet neck infections were scored as 9 in SES”
Claim · model-written summary
Leaf blast at seedling stage caused economic losses in finger millet.
- Taxon
- finger millet
Eleusine coracanae3 - Organ / stage
- seedling stagee3
- Interactor
- Magnaporthe sp.
Magnaporthee0pathogen - Outcome
- economic lossese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Blast disease caused by Magnaporthe sp. is one of the most destructive diseases in cereal crops”
e3“Unlike rice, leaf blast at seedling stage caused economic losses in finger millet”
Claim · model-written summary
Mature finger millet fields were susceptible to neck and finger blast.
- Taxon
- finger milletEleusine coracanae4
- Outcome
- neck and finger blaste4
- Qualifier
- Mature finger millet fields were susceptiblee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Mature finger millet fields were susceptible to neck and finger blast”
Claim · model-written summary
Curative fungicide treatment was ineffective in controlling blast in the field.
- Taxon
- RiceOryza sativat0
- Treatment
- curative fungicide treatmente5
- Outcome
- controlling blaste5
- Direction
- ineffectivee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice and Finger millet”
e5“Due to rapid disease development curative fungicide treatment was ineffective in controlling blast”
Claim · model-written summary
Sudden weather changes during infections coincided with the infection events, according to farmer reports.
- Taxon
- RiceOryza sativat0
- Outcome
- sudden changes in the weather during infectionse6
- Qualifier
- gloomy weather caused a spike in humidity and low temperatures that coincided with the infectione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice and Finger millet”
e6“Farmers reported sudden changes in the weather during infections whereby gloomy weather caused a spike in humidity and low temperatures that coincided with the infection”
Claim · model-written summary
A host susceptibility window synchronized with conducive environments results in severe blast infections.
- Taxon
- RiceOryza sativat0
- Outcome
- severe blast infectionse7
- Qualifier
- Host susceptibility window synchronized with conducive environmentse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice and Finger millet”
e7“Host susceptibility window synchronized with conducive environments result in severe blast infections”
Claim · model-written summary
Blast management needs a coordinated effort, with resistant germplasm combined with climate-based predictions.
- Taxon
- RiceOryza sativat0
- Outcome
- blast disease managemente7
- Qualifier
- system level interventionse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice and Finger millet”
e7“blast disease management needs a coordinated effort and system level interventions”
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fungicide · disease · Oryza sativa (rice)Positive and negative results
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