Meloidogyne hapla 1,636 claims

species · family Meloidogynidae · animal · NCBI Taxonomy ↗

Also written in claims: M.hapla · M . hapla · M hapla · M. hapla Chitwood · Root-knot nematode · M. hapla H2

19 spellings

Meloidogyne hapla · picture from its Wikimedia Commons categoryWalter Peraza Padilla, National University of Costa Rica, Bugwood.org · CC BY 3.0 us · Wikimedia Commons ↗

1,636 claims

Open in search (filters, sorting) →

Observationobservedoriginal resultmeasured

Claim · model-written summary

Nematode morphology was consistent with Meloidogyne hapla.

Taxon: Taraxacum mongolicumTaraxacum mongolicumt0
Interactor: Meloidogyne haplaMeloidogyne haplae0pathogen
Outcome: morphological characteristics were consistente0

Verbatim

e0
“These morphological characteristics were consistent with those of Meloidogyne hapla Chitwood, 1949”
✓ located verbatim in the source · abstract, characters 1736–1834

t0
“Taraxacum mongolicum”
✓ located verbatim in the source · title, characters 67–87

Title

First Report of the Root-Knot Nematode Meloidogyne hapla Infecting Taraxacum mongolicum in Hubei Province, China

Qujuan Luo; Chongyi Fu; Wei Jiang; et al. Plant Disease 2026. doi:10.1094/pdis-02-26-0251-pdn

Other claims from this paper (7)

Observation About 60% of inspected plants showed above-ground decline.
Observation All symptomatic plants had root galling.
Observation The nematode sequences had 99.79-100% identity with M. hapla sequences.
Intervention effect All inoculated plants developed root galls; controls remained asymptomatic.
Observation Nematodes reproduced on the host with a factor of 7.6 ± 1.1.
Observation Re-isolated nematodes were confirmed as M. hapla by PCR.
Observation The authors report the first M. hapla infection of T. mongolicum.

Observationobservedoriginal resultmeasured

Claim · model-written summary

The nematode sequences had 99.79-100% identity with M. hapla sequences.

Taxon: Taraxacum mongolicumTaraxacum mongolicumt0
Interactor: M. haplaMeloidogyne haplae0pathogen
Outcome: identity with multiple confirmed M. hapla sequencese0
Value: 99.79-100%e0

Verbatim

e0
“The obtained sequences (GenBank accession no. PX928920 and PX927953, respectively) showed 99.79-100% identity with multiple confirmed M. hapla sequences in the NCBI database”
✓ located verbatim in the source · abstract, characters 2276–2449

t0
“Taraxacum mongolicum”
✓ located verbatim in the source · title, characters 67–87

Title

First Report of the Root-Knot Nematode Meloidogyne hapla Infecting Taraxacum mongolicum in Hubei Province, China

Qujuan Luo; Chongyi Fu; Wei Jiang; et al. Plant Disease 2026. doi:10.1094/pdis-02-26-0251-pdn

Other claims from this paper (7)

Observation About 60% of inspected plants showed above-ground decline.
Observation All symptomatic plants had root galling.
Observation Nematode morphology was consistent with Meloidogyne hapla.
Intervention effect All inoculated plants developed root galls; controls remained asymptomatic.
Observation Nematodes reproduced on the host with a factor of 7.6 ± 1.1.
Observation Re-isolated nematodes were confirmed as M. hapla by PCR.
Observation The authors report the first M. hapla infection of T. mongolicum.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Re-isolated nematodes were confirmed as M. hapla by PCR.

Taxon: Taraxacum mongolicumTaraxacum mongolicumt0
Interactor: M. haplaMeloidogyne haplae0pathogen
Outcome: confirmed to be M. haplae0

Verbatim

e0
“The nematodes re-isolated from the galls were confirmed to be M. hapla by PCR with species-specific SCAR primers JMV1/JMV hapla”
✓ located verbatim in the source · abstract, characters 3137–3264

t0
“Taraxacum mongolicum”
✓ located verbatim in the source · title, characters 67–87

Title

First Report of the Root-Knot Nematode Meloidogyne hapla Infecting Taraxacum mongolicum in Hubei Province, China

Qujuan Luo; Chongyi Fu; Wei Jiang; et al. Plant Disease 2026. doi:10.1094/pdis-02-26-0251-pdn

Other claims from this paper (7)

Observation About 60% of inspected plants showed above-ground decline.
Observation All symptomatic plants had root galling.
Observation Nematode morphology was consistent with Meloidogyne hapla.
Observation The nematode sequences had 99.79-100% identity with M. hapla sequences.
Intervention effect All inoculated plants developed root galls; controls remained asymptomatic.
Observation Nematodes reproduced on the host with a factor of 7.6 ± 1.1.
Observation The authors report the first M. hapla infection of T. mongolicum.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

The authors report the first M. hapla infection of T. mongolicum.

Taxon: T. mongolicumTaraxacum mongolicume0
Interactor: M. haplaMeloidogyne haplae0pathogen
Outcome: M. hapla infecting T. mongolicume0

Verbatim

e0
“this is the first report of M. hapla infecting T. mongolicum”
✓ located verbatim in the source · abstract, characters 3400–3460

Title

First Report of the Root-Knot Nematode Meloidogyne hapla Infecting Taraxacum mongolicum in Hubei Province, China

Qujuan Luo; Chongyi Fu; Wei Jiang; et al. Plant Disease 2026. doi:10.1094/pdis-02-26-0251-pdn

Other claims from this paper (7)

Observation About 60% of inspected plants showed above-ground decline.
Observation All symptomatic plants had root galling.
Observation Nematode morphology was consistent with Meloidogyne hapla.
Observation The nematode sequences had 99.79-100% identity with M. hapla sequences.
Intervention effect All inoculated plants developed root galls; controls remained asymptomatic.
Observation Nematodes reproduced on the host with a factor of 7.6 ± 1.1.
Observation Re-isolated nematodes were confirmed as M. hapla by PCR.

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Several metabolites had nematicidal activity against M. hapla in vitro at root concentrations.

Taxon: Solanum sisymbriifoliumSolanum sisymbriifoliume0
Interactor: M. haplaMeloidogyne haplae0pathogen
Outcome: nematicidal activitye0
Setting: in vitroe0

Verbatim

e0
“Several of these metabolites had nematicidal activity in vitro against the root-knot nematodes, Meloidogyne chitwoodi , M. incognita , and M. hapla , at concentrations measured in Solanum sisymbriifolium roots”
✓ located verbatim in the source · abstract, characters 528–737

Title

Organic acids produced by Solanum sisymbriifolium contribute to its resistance against nematodes

Nataniel D. Jablonski; Faith M. Fishburn; Lindsay L. Schulz; et al. Physiological and Molecular Plant Pathology 2026. doi:10.1016/j.pmpp.2026.103145

Other claims from this paper (9)

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

3-octanone had stronger effects on M. hapla.

Taxon: plante1
Treatment: 3-octanonee0
Interactor: M. haplaMeloidogyne haplae0pest
Outcome: effects only on M. haplae0
Direction: strongere0

Not reportedComparator

Verbatim

e0
“3-octanone showed stronger effects only on M. hapla”
✓ located verbatim in the source · abstract, characters 644–695

t0
“Meloidogyne Species”
✓ located verbatim in the source · title, characters 114–133

e1
“plant–soil greenhouse conditions”
✓ located verbatim in the source · abstract, characters 1286–1318

Title

Inhibitory Effects of 3-Octanone and 1-Octen-3-ol on Juvenile Survival, Egg Development, and Egg-Mass Hatching in Meloidogyne Species

Alexandra M. Kortsinoglou; Dionysios Ntinokas; Nikolaos S. Lotsios; et al. Horticulturae 2026. doi:10.3390/horticulturae12050591

Other claims from this paper (11)

Intervention effect The fungal volatiles produced 95–100% juvenile nematode mortality at 500–1000 ppm within 24 h.
Intervention effect Juvenile mobility declined at lower volatile concentrations.
Intervention effect 1-octen-3-ol was more effective against M. arenaria.
Intervention effect 3-octanone had moderate effects on M. incognita.
Intervention effect 3-octanone had moderate effects on M. javanica.
Intervention effect Volatile exposure significantly inhibited M. javanica egg differentiation by as much as 80% at 1000 ppm.
Observation Effects on M. javanica egg differentiation persisted at 125 ppm.
Intervention effect Egg-mass hatching decreased up to 95% with concentration regardless of volatile type.
Intervention effect Microcosms yielded over 90% fewer recovered juveniles at 125 ppm after 24 h.
Observation Volatile effects were reduced in greenhouse plant–soil conditions.
Observation Nematode infection showed decreasing trends in plant–soil greenhouse conditions.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Inoculated plants had a mean gall index of 1.84 ± 0.94.

Taxon: Knoxia roxburghiiKnoxia roxburghiit0
Interactor: Meloidogyne haplaMeloidogyne haplat1pathogen
Outcome: GIe0
Value: 1.84 ± 0.94e0

Verbatim

t0
“Knoxia roxburghii”
✓ located verbatim in the source · title, characters 65–82

e0
“The inoculated K. roxburghii plants had an average of GI 1.84 ± 0.94”
✓ located verbatim in the source · abstract, characters 2885–2953

t1
“Meloidogyne hapla”
✓ located verbatim in the source · title, characters 44–61

Title

First Report of Root-Knot Disease Caused by Meloidogyne hapla on Knoxia roxburghii in Yunnan, China

Yinghao Xian; Weisi Ma; Yinzhi Yang; et al. Plant Disease 2026. doi:10.1094/pdis-10-25-2069-pdn

Other claims from this paper (13)

Observation Root-knot disease was observed on K. roxburghii in Anning, Yunnan.
Observation Infected K. roxburghii formed root knots on tap and fibrous roots, with possible necrosis in severe cases.
Observation Mean tap-root knot weight was 33.71% of total root weight per plant.
Observation Soil contained 24.25 ± 10.30 nematode juveniles per 100 g.
Observation Morphology was consistent with Meloidogyne hapla.
Observation D2/D3 and ITS sequences showed 99.78 - 100 % similarity to M. hapla sequences.
Observation Phylogenetic trees clustered the nematode with M. hapla.
Intervention effect Nematode inoculation produced galls after 90 days, while controls lacked symptoms.
Observation Molecular reconfirmation identified M. hapla after inoculation.
Observation Inoculated plants had 39.13 ± 17.27 eggs per gram of root.
Observation Inoculated plants had 14.00 ± 5.62 egg masses per root.
Observation The reproduction factor was 4.07 ± 1.64.
Observation The authors report the first M. hapla infection of K. roxburghii in Yunnan, China.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Inoculated plants had 39.13 ± 17.27 eggs per gram of root.

Taxon: Knoxia roxburghiiKnoxia roxburghiit0
Interactor: Meloidogyne haplaMeloidogyne haplat1pathogen
Outcome: eggs/g roote0
Value: 39.13 ± 17.27e0

Verbatim

t0
“Knoxia roxburghii”
✓ located verbatim in the source · title, characters 65–82

e0
“eggs/g root 39.13 ± 17.27”
✓ located verbatim in the source · abstract, characters 2955–2980

t1
“Meloidogyne hapla”
✓ located verbatim in the source · title, characters 44–61

Title

First Report of Root-Knot Disease Caused by Meloidogyne hapla on Knoxia roxburghii in Yunnan, China

Yinghao Xian; Weisi Ma; Yinzhi Yang; et al. Plant Disease 2026. doi:10.1094/pdis-10-25-2069-pdn

Other claims from this paper (13)

Observation Root-knot disease was observed on K. roxburghii in Anning, Yunnan.
Observation Infected K. roxburghii formed root knots on tap and fibrous roots, with possible necrosis in severe cases.
Observation Mean tap-root knot weight was 33.71% of total root weight per plant.
Observation Soil contained 24.25 ± 10.30 nematode juveniles per 100 g.
Observation Morphology was consistent with Meloidogyne hapla.
Observation D2/D3 and ITS sequences showed 99.78 - 100 % similarity to M. hapla sequences.
Observation Phylogenetic trees clustered the nematode with M. hapla.
Intervention effect Nematode inoculation produced galls after 90 days, while controls lacked symptoms.
Observation Molecular reconfirmation identified M. hapla after inoculation.
Observation Inoculated plants had a mean gall index of 1.84 ± 0.94.
Observation Inoculated plants had 14.00 ± 5.62 egg masses per root.
Observation The reproduction factor was 4.07 ± 1.64.
Observation The authors report the first M. hapla infection of K. roxburghii in Yunnan, China.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Inoculated plants had 14.00 ± 5.62 egg masses per root.

Taxon: Knoxia roxburghiiKnoxia roxburghiit0
Interactor: Meloidogyne haplaMeloidogyne haplat1pathogen
Outcome: egg masses/roote0
Value: 14.00 ± 5.62e0

Verbatim

t0
“Knoxia roxburghii”
✓ located verbatim in the source · title, characters 65–82

e0
“egg masses/root 14.00 ± 5.62”
✓ located verbatim in the source · abstract, characters 2982–3010

t1
“Meloidogyne hapla”
✓ located verbatim in the source · title, characters 44–61

Title

First Report of Root-Knot Disease Caused by Meloidogyne hapla on Knoxia roxburghii in Yunnan, China

Yinghao Xian; Weisi Ma; Yinzhi Yang; et al. Plant Disease 2026. doi:10.1094/pdis-10-25-2069-pdn

Other claims from this paper (13)

Observation Root-knot disease was observed on K. roxburghii in Anning, Yunnan.
Observation Infected K. roxburghii formed root knots on tap and fibrous roots, with possible necrosis in severe cases.
Observation Mean tap-root knot weight was 33.71% of total root weight per plant.
Observation Soil contained 24.25 ± 10.30 nematode juveniles per 100 g.
Observation Morphology was consistent with Meloidogyne hapla.
Observation D2/D3 and ITS sequences showed 99.78 - 100 % similarity to M. hapla sequences.
Observation Phylogenetic trees clustered the nematode with M. hapla.
Intervention effect Nematode inoculation produced galls after 90 days, while controls lacked symptoms.
Observation Molecular reconfirmation identified M. hapla after inoculation.
Observation Inoculated plants had a mean gall index of 1.84 ± 0.94.
Observation Inoculated plants had 39.13 ± 17.27 eggs per gram of root.
Observation The reproduction factor was 4.07 ± 1.64.
Observation The authors report the first M. hapla infection of K. roxburghii in Yunnan, China.

Observationauthor interpretationoriginal resultmeasured

Claim · model-written summary

The authors report the first M. hapla infection of K. roxburghii in Yunnan, China.

Taxon: Knoxia roxburghiiKnoxia roxburghiit0
Interactor: M. haplaMeloidogyne haplae0pathogen
Outcome: first report of M. hapla infecting K. roxburghiie0
Setting: Yunnan, Chinae0

Verbatim

t0
“Knoxia roxburghii”
✓ located verbatim in the source · title, characters 65–82

e0
“this is the first report of M. hapla infecting K. roxburghii in Yunnan, China”
✓ located verbatim in the source · abstract, characters 3074–3151

Title

First Report of Root-Knot Disease Caused by Meloidogyne hapla on Knoxia roxburghii in Yunnan, China

Yinghao Xian; Weisi Ma; Yinzhi Yang; et al. Plant Disease 2026. doi:10.1094/pdis-10-25-2069-pdn

Other claims from this paper (13)

Observation Root-knot disease was observed on K. roxburghii in Anning, Yunnan.
Observation Infected K. roxburghii formed root knots on tap and fibrous roots, with possible necrosis in severe cases.
Observation Mean tap-root knot weight was 33.71% of total root weight per plant.
Observation Soil contained 24.25 ± 10.30 nematode juveniles per 100 g.
Observation Morphology was consistent with Meloidogyne hapla.
Observation D2/D3 and ITS sequences showed 99.78 - 100 % similarity to M. hapla sequences.
Observation Phylogenetic trees clustered the nematode with M. hapla.
Intervention effect Nematode inoculation produced galls after 90 days, while controls lacked symptoms.
Observation Molecular reconfirmation identified M. hapla after inoculation.
Observation Inoculated plants had a mean gall index of 1.84 ± 0.94.
Observation Inoculated plants had 39.13 ± 17.27 eggs per gram of root.
Observation Inoculated plants had 14.00 ± 5.62 egg masses per root.
Observation The reproduction factor was 4.07 ± 1.64.