Abstract
Brown leaf spot disease caused by Alternaria spp. is among the most common diseases of potato crops. Typical brown spot symptoms were observed in commercial potato-cultivation areas of northern Korea from June to August 2020–2021. In total, 68 isolates were collected, and based on sequence analysis of the internal transcribed spacer (ITS) region, the collected isolates were identified as Alternaria spp. (80.9%). Phylogenetic analysis revealed that a majority of these isolates clustered within a clade that included A. alternata. Additionally, the ITS region and rpb2 yielded the most informative sequences for the identification of A. alternata. Pathogenicity tests confirmed that the collected pathogens elicited symptoms identical to those observed in the field. In pathogenicity tests performed on seven commercial cultivars, the pathogens exhibited strong virulence in both wound and non-wound inoculations. Among the cultivars tested, Arirang-1ho, Arirang-2ho, and Golden Ball were resistant to the pathogens. Furthermore, among the fungicides tested in vitro, mancozeb and difenoconazole were found to be effective for inhibiting mycelial growth. In summary, our findings suggest that A. alternata plays a critical role in leaf disease in potato-growing regions and emphasise the necessity of continuous monitoring and management to protect against this disease in Korea.
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Claims 12
Claim · model-written summary
Brown spot symptoms occurred in northern Korean potato cultivation areas during 2020–2021.
- Taxon
- potato
Solanum tuberosume0 - Outcome
- brown spot symptomse0
- Qualifier
- June to August 2020–2021e0
- Setting
- northern Koreae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Typical brown spot symptoms were observed in commercial potato-cultivation areas of northern Korea from June to August 2020–2021.”
Claim · model-written summary
ITS analysis identified 80.9% of collected potato isolates as Alternaria spp.
- Taxon
- PotatoSolanum tuberosumt0
- Interactor
- Alternaria spp.
Alternariae0pathogen - Outcome
- isolates were identified as Alternaria spp.e0
- Value
- 80.9%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“based on sequence analysis of the internal transcribed spacer (ITS) region, the collected isolates were identified as Alternaria spp. (80.9%)”
t0“Potato Plants”
Claim · model-written summary
Most isolates clustered with A. alternata.
- Taxon
- PotatoSolanum tuberosumt0
- Interactor
- A. alternata
.jpg?width=60)
Alternaria alternatae0pathogen - Outcome
- isolates clustered within a clade that included A. alternatae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“a majority of these isolates clustered within a clade that included A. alternata”
t0“Potato Plants”
Claim · model-written summary
ITS and rpb2 were the most informative sequences for A. alternata identification.
- Taxon
- PotatoSolanum tuberosumt0
- Interactor
- A. alternataAlternaria alternatae0pathogen
- Gene
- rpb2e0
- Outcome
- most informative sequences for the identification of A. alternatae0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ITS region and rpb2 yielded the most informative sequences for the identification of A. alternata”
t0“Potato Plants”
Claim · model-written summary
Collected pathogens reproduced field symptoms in pathogenicity tests.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- collected pathogense0
- Interactor
- collected pathogense0pathogen
- Outcome
- symptoms identicale0
- Comparator
- those observed in the fielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pathogenicity tests confirmed that the collected pathogens elicited symptoms identical to those observed in the field.”
t0“Potato Plants”
Claim · model-written summary
The pathogens showed strong virulence with wound inoculation on seven commercial cultivars.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- wound inoculationse0
- Interactor
- pathogense0pathogen
- Outcome
- strong virulencee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In pathogenicity tests performed on seven commercial cultivars, the pathogens exhibited strong virulence in both wound and non-wound inoculations.”
t0“Potato Plants”
Claim · model-written summary
The pathogens showed strong virulence with non-wound inoculation on seven commercial cultivars.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- non-wound inoculationse0
- Interactor
- pathogense0pathogen
- Outcome
- strong virulencee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In pathogenicity tests performed on seven commercial cultivars, the pathogens exhibited strong virulence in both wound and non-wound inoculations.”
t0“Potato Plants”
Claim · model-written summary
Arirang-1ho was resistant to the pathogens.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Arirang-1hoe0
- Interactor
- pathogense0pathogen
- Outcome
- resistant to the pathogense0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arirang-1ho, Arirang-2ho, and Golden Ball were resistant to the pathogens.”
t0“Potato Plants”
Claim · model-written summary
Arirang-2ho was resistant to the pathogens.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Arirang-2hoe0
- Interactor
- pathogense0pathogen
- Outcome
- resistant to the pathogense0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arirang-1ho, Arirang-2ho, and Golden Ball were resistant to the pathogens.”
t0“Potato Plants”
Claim · model-written summary
Golden Ball was resistant to the pathogens.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Golden Balle0
- Interactor
- pathogense0pathogen
- Outcome
- resistant to the pathogense0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arirang-1ho, Arirang-2ho, and Golden Ball were resistant to the pathogens.”
t0“Potato Plants”
Claim · model-written summary
Mancozeb inhibited fungal mycelial growth in vitro.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- mancozebe0
- Interactor
- Alternaria alternataAlternaria alternatat0pathogen
- Outcome
- mycelial growthe0
- Direction
- inhibitinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mancozeb and difenoconazole were found to be effective for inhibiting mycelial growth”
t0“Isolation and Identification of Alternaria alternata from Potato Plants Affected by Leaf Spot Disease in Korea: Selection of Effective Fungicides”
Claim · model-written summary
Difenoconazole inhibited fungal mycelial growth in vitro.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- difenoconazolee0
- Interactor
- Alternaria alternataAlternaria alternatat0pathogen
- Outcome
- mycelial growthe0
- Direction
- inhibitinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mancozeb and difenoconazole were found to be effective for inhibiting mycelial growth”
t0“Isolation and Identification of Alternaria alternata from Potato Plants Affected by Leaf Spot Disease in Korea: Selection of Effective Fungicides”
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mancozeb · Alternaria alternata · Solanum tuberosum (potato)Results agree
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See all 113 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.