Abstract
Lespedeza davurica is an important leguminous forage species widely distributed in China’s natural grasslands, where it contributes significantly to ecological stability and sustainable animal husbandry. However, a severe root rot disease, with disease incidence up to 100% has been observed in surveyed areas of Huan County, Gansu Province, China, causing substantial damage to the host plant, while the causal agent remains uncharacterized. Four fungal isolates recovered from symptomatic roots were identified as a novel species of Monosporascus based on morphological characteristics and phylogenetic analyses of ITS, LSU, and Tub2 sequences. The isolates were formally described as Monosporascus lespedezae sp. nov. Pathogenicity tests confirmed high virulence, with inoculated plants showing 100% disease incidence and significant reductions in root length (81.3%) and plant height (63.0%) compared to non-inoculated controls ( P < 0.001). In vitro fungicide sensitivity assays showed differential responses among tested compounds: diniconazole exhibited the lowest EC 50 value (0.5198 μg/mL), whereas carbendazim completely inhibited mycelial growth at 10 μg/mL (EC 50 = 2.791 μg/mL). Both fungicides show promise for further valuation. This study represents the first report of M. lespedezae sp. nov. as a pathogen of L. davurica , establishes its taxonomic position, and provides baseline in vitro fungicide sensitivity data, thereby laying a scientific foundation for developing effective disease management strategies.
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Claims 10
Claim · model-written summary
Root rot of Lespedeza davurica reached disease incidence of up to 100% in surveyed areas of Huan County, Gansu Province, China.
- Taxon
- Lespedeza davuricaLespedeza davuricat0
- Outcome
- disease incidencee1
- Value
- up to 100%e1
- Setting
- Huan County, Gansu Province, Chinae1
Verbatim
t0“causing root rot of Lespedeza davurica”
e1“a severe root rot disease, with disease incidence up to 100% has been observed in surveyed areas of Huan County, Gansu Province, China”
Claim · model-written summary
Four fungal isolates from symptomatic roots of Lespedeza davurica were identified as a novel species of Monosporascus.
- Taxon
- Lespedeza davuricaLespedeza davuricat0
- Interactor
- MonosporascusMonosporascuse2pathogen
- Outcome
- novel species of Monosporascuse2
Verbatim
t0“causing root rot of Lespedeza davurica”
e2“Four fungal isolates recovered from symptomatic roots were identified as a novel species of Monosporascus”
Claim · model-written summary
Inoculated Lespedeza davurica plants showed 100% disease incidence, higher than non-inoculated controls.
- Taxon
- Lespedeza davuricaLespedeza davuricat0
- Treatment
- inoculated plantse3
- Interactor
- MonosporascusMonosporascuse2pathogen
- Outcome
- disease incidencee3
- Direction
- higherinferrede3
- Value
- 100%e3
- Comparator
- non-inoculated controlse3
Verbatim
t0“causing root rot of Lespedeza davurica”
e2“Four fungal isolates recovered from symptomatic roots were identified as a novel species of Monosporascus”
e3“Pathogenicity tests confirmed high virulence, with inoculated plants showing 100% disease incidence and significant reductions in root length (81.3%) and plant height (63.0%) compared to non-inoculated controls ( P < 0.001 )”
Claim · model-written summary
Inoculated Lespedeza davurica plants had significantly reduced root length (81.3%) compared with non-inoculated controls.
- Taxon
- Lespedeza davuricaLespedeza davuricat0
- Treatment
- inoculated plantse3
- Interactor
- MonosporascusMonosporascuse2pathogen
- Outcome
- root lengthe3
- Direction
- reductionse3
- Value
- 81.3%e3
- Comparator
- non-inoculated controlse3
Verbatim
t0“causing root rot of Lespedeza davurica”
e2“Four fungal isolates recovered from symptomatic roots were identified as a novel species of Monosporascus”
e3“Pathogenicity tests confirmed high virulence, with inoculated plants showing 100% disease incidence and significant reductions in root length (81.3%) and plant height (63.0%) compared to non-inoculated controls ( P < 0.001 )”
Claim · model-written summary
Inoculated Lespedeza davurica plants had significantly reduced plant height (63.0%) compared with non-inoculated controls.
- Taxon
- Lespedeza davuricaLespedeza davuricat0
- Treatment
- inoculated plantse3
- Interactor
- MonosporascusMonosporascuse2pathogen
- Outcome
- plant heighte3
- Direction
- reductionse3
- Value
- 63.0%e3
- Comparator
- non-inoculated controlse3
Verbatim
t0“causing root rot of Lespedeza davurica”
e2“Four fungal isolates recovered from symptomatic roots were identified as a novel species of Monosporascus”
e3“Pathogenicity tests confirmed high virulence, with inoculated plants showing 100% disease incidence and significant reductions in root length (81.3%) and plant height (63.0%) compared to non-inoculated controls ( P < 0.001 )”
Claim · model-written summary
Diniconazole had the lowest EC50 (0.5198 μg/mL) of the tested fungicides against the pathogen, lower than carbendazim.
- Taxon
- Lespedeza davuricaLespedeza davuricat0
- Treatment
- diniconazolee4
- Interactor
- MonosporascusMonosporascuse2pathogen
- Outcome
- EC 50 valuee4
- Direction
- loweste4
- Value
- 0.5198 μg/mLe4
- Comparator
- carbendazime5
Verbatim
t0“causing root rot of Lespedeza davurica”
e2“Four fungal isolates recovered from symptomatic roots were identified as a novel species of Monosporascus”
e4“diniconazole exhibited the lowest EC 50 value (0.5198 μg/mL)”
e5“whereas carbendazim completely inhibited mycelial growth at 10 μg/mL”
Claim · model-written summary
Carbendazim at 10 μg/mL completely inhibited mycelial growth of the pathogen.
- Taxon
- Lespedeza davuricaLespedeza davuricat0
- Treatment
- carbendazime5
- Interactor
- MonosporascusMonosporascuse2pathogen
- Outcome
- mycelial growthe5
- Direction
- inhibitede5
- Value
- 10 μg/mLe5
Not reportedComparator
Verbatim
t0“causing root rot of Lespedeza davurica”
e2“Four fungal isolates recovered from symptomatic roots were identified as a novel species of Monosporascus”
e5“carbendazim completely inhibited mycelial growth at 10 μg/mL (EC 50 = 2.791 μg/mL)”
Claim · model-written summary
Carbendazim had an EC50 of 2.791 μg/mL against the pathogen.
- Taxon
- Lespedeza davuricaLespedeza davuricat0
- Treatment
- carbendazime5
- Interactor
- MonosporascusMonosporascuse2pathogen
- Outcome
- EC 50e5
- Value
- 2.791 μg/mLe5
Verbatim
t0“causing root rot of Lespedeza davurica”
e2“Four fungal isolates recovered from symptomatic roots were identified as a novel species of Monosporascus”
e5“carbendazim completely inhibited mycelial growth at 10 μg/mL (EC 50 = 2.791 μg/mL)”
Claim · model-written summary
This study is the first report of M. lespedezae sp. nov. as a pathogen of Lespedeza davurica.
- Taxon
- L. davuricaLespedeza davuricae6
- Interactor
- M. lespedezae sp. nov.e6pathogen
- Outcome
- first reporte6
Verbatim
e6“This study represents the first report of M. lespedezae sp. nov. as a pathogen of L. davurica”
Claim · model-written summary
Both tested fungicides show promise for further evaluation against this root rot.
- Taxon
- Lespedeza davuricaLespedeza davuricat0
- Treatment
- Both fungicidese7
- Outcome
- promise for further valuatione7
Verbatim
t0“causing root rot of Lespedeza davurica”
e7“Both fungicides show promise for further valuation”