Description of six new species of Oscheius Andrassy, 1976 (Nematoda: Rhabditida) from Pakistan with a key and diagnostic compendium to species of the genus

Tabassum, K. A.; Shahina, F.; Nasira, K.; Erum, Y. I.

doi:10.18681/pjn.v34.i02.p109

Cited by 13 publications

(7 citation statements)

References 6 publications

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“…Morphological characters and morphometric data of this population are in full agreement with the data given in the original description of the species and the morphometric data ranges given by Tabassum et al (2016) (Fig. 3, Table 1).…”

Section: Oscheius Necromenus (Sudhaus and Schulte 1989)supporting

confidence: 87%

“…Morphological characters and morphometric data, given in original descriptions and the data given by Tabassum et al (2016), were used for morphological identification.…”

Section: Sampling Extracting Mounting and Taxonomymentioning

confidence: 99%

“…According to Sudhaus (1976) and Sudhaus and Hooper (1994), species of the genus form two separate subclades. The 42 known species of the genus are clustered in two Insectivora and Dolichura groups (Tabassum et al 2016). According to Liu et al (2012), different types of host association are known for the species of the genus in the Insectivora group.…”

Section: Introductionmentioning

confidence: 99%

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The occurrence of three species of the genus Oscheius Andrássy, 1976 (Nematoda: Rhabditida) in Iran

Valizadeh¹,

Goldasteh²,

Rafiei-Karahroodi³

et al. 2017

Journal of Plant Protection Research

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Due to importance and effectiveness of some entomopathogenic or insect parasitic nematodes in controlling of agricultural pests, or pests of non-agricultural plants, a study was conducted in order to identify the species of this group of nematodes in city of Tehran. As the result, three species belonging to the genus Oscheius were recovered in association with bark samples having the bark beetle galleries. Morphological and molecular data were provided for two recently recovered species of the genus, namely O. necromenus and O. onirici. Molecular data were also provided for a recently recovered isolate of O. tipulae. All three species were recovered in association with bark samples collected from dead trees in the city of Tehran. Morphological characters and morphometric data of the two aforementioned species are in accordance with the data given in their original descriptions. One recovered individual from a small bark sample characterized by its short body length was sequenced for its 28S and internal transcribed spacer (ITS) rDNA loci, and the results of BLAST search using the newly obtained partial sequences revealed that it belonged to O. tipulae. Molecular phylogenetic studies revealed recently sequenced Iranian populations of O. onirici and O. tipulae forming a clade with other isolates/populations of these species in ITS tree with maximal Bayesian posterior probability (BPP), and presently sequenced isolates of O. tipulae and O. necromenus form a clade with other isolates of these species in 28S tree. The two species O. onirici and O. necromenus were reported in Iran for the first time.

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Section: Oscheius Necromenus (Sudhaus and Schulte 1989)supporting

confidence: 87%

“…Morphological characters and morphometric data, given in original descriptions and the data given by Tabassum et al (2016), were used for morphological identification.…”

Section: Sampling Extracting Mounting and Taxonomymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The occurrence of three species of the genus Oscheius Andrássy, 1976 (Nematoda: Rhabditida) in Iran

Valizadeh¹,

Goldasteh²,

Rafiei-Karahroodi³

et al. 2017

Journal of Plant Protection Research

View full text Add to dashboard Cite

show abstract

“…Typically, nematodes in the genus Oscheius have been considered insect pathogenic nematodes of soil-borne insects and other arthropods (Darsouei et al, 2014;Liu et al, 2012;Zhou et al, 2017). Numerous studies reported that various Oscheius species were recovered and baited by G. mellonella larvae in Asia (Al-Zaidawi et al, 2019;Loulou et al, 2022;Pervez et al, 2013;Tabassum et al, 2016).…”

Section: Estimation Of Median Lethal Concentration (Lc 50 )mentioning

confidence: 99%

“…According to phylogenetic trees based on 18S ribosomal deoxyribonucleic acid (rDNA) and internal transcribed spacer sequences (ITS), Oscheius species can be split into two groups: Dolichura and Insectivora (Liu et al, 2012; Tabassum et al, 2016; Zhang et al, 2012). Some species under Insectivora group, including Oscheius onirici Torrini et al, O. microvilli Zhou et al and O. myriophilus Poinar, have various connections with insects and are lethal parasites to some insect pests (Al‐Zaidawi et al, 2020; Torrini et al, 2015; Zhou et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Occurrence of entomopathogenic nematodes, Oscheius myriophilus Poinar in Thailand: Preliminary characterization of novel isolates and biological control potential against insect pests

Onwong,

Sumaya,

Nitjarunkul

et al. 2023

J Applied Entomology

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Numerous nematodes in the genus Oscheius possess entomopathogenic abilities. These nematodes also kill their insect hosts by releasing their symbiotic bacteria within 48–72 h. In this study, 12 indigenous isolates of Oscheius myriophilus based on molecular, morphological, and morphometric studies were recovered from different undisturbed soils in Thailand. Moreover, the virulence of 12 O. myriophilus at a rate of 25 IJs/cm2 against fifth‐instar larvae of Galleria mellonella ranged from 56%–86% after 72 h of exposure. Oscheius myriophilus EPNKU40 exhibited the highest efficacy in causing mortality in the insect larvae. It also killed third‐instar larvae of Spodoptera litura and Spodoptera exigua up to 60% after 72 h of exposure. The median lethal concentration (LC50) values of O. myriophilus EPNKU40 against G. mellonella larvae after 48 and 72 h of exposure were 11 and 4 IJs/cm2, respectively. The discovery of O. myriophulus is the first record in Thailand characterized using morphological, morphometric, and molecular diagnostic tools, which have shown lethal effects against insect pests and can later be utilized as biocontrol agents after several comprehensive assessments.

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A Nematode Isolate, Oscheius Tipulae, Exhibiting a Wide Entomopathogenic Spectrum and its Application to Control Dipteran Insect Pests

Abdisa,

Esmaeily,

Kwon

et al. 2024

Arch Insect Biochem Physiol

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An entomopathogenic nematode, Oscheius tipulae, was isolated from a soil sample. The identification of this species was supported by morphological and molecular markers. The nematode isolate exhibited pathogenicity against different target insects including lepidopteran, coleopteran, and dipteran insects. The virulence of this nematode was similar to that of a well‐known entomopathogenic nematode, Steinernema carpocapsae, against the same insect targets. A comparative metagenomics analysis of these two nematode species predicted the existence of a combined total of 272 bacterial species in their intestines, of which 51 bacterial species were shared between the two nematode species. In particular, the common gut bacteria included several entomopathogenic bacteria including Xenorhabdus nematophila, which is known as a symbiotic bacterium to S. carpocapsae. The nematode virulence of O. tipulae to insects was enhanced by an addition of dexamethasone but suppressed by an addition of arachidonic acid, suggesting that the immune defenses of the target insects against the nematode infection is mediated by eicosanoids, which would be manipulated by the symbiotic bacteria of the nematode. Unlike S. carpocapsae, O. tipulae showed high virulence against dipteran insects including fruit flies, onion flies, and mosquitoes. O. tipulae showed particularly high control efficacies against the onion maggot, Delia platura, infesting the Welsh onion in the rhizosphere in both pot and field assays.

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Description of six new species of Oscheius Andrassy, 1976 (Nematoda: Rhabditida) from Pakistan with a key and diagnostic compendium to species of the genus

Cited by 13 publications

References 6 publications

The occurrence of three species of the genus Oscheius Andrássy, 1976 (Nematoda: Rhabditida) in Iran

The occurrence of three species of the genus Oscheius Andrássy, 1976 (Nematoda: Rhabditida) in Iran

Occurrence of entomopathogenic nematodes, Oscheius myriophilus Poinar in Thailand: Preliminary characterization of novel isolates and biological control potential against insect pests

A Nematode Isolate, Oscheius Tipulae, Exhibiting a Wide Entomopathogenic Spectrum and its Application to Control Dipteran Insect Pests

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