Some additional bionomic characters of Deladenus nitobei

Kanzaki, Natsumi; Tanaka, Shino; Ito, Mizuho; Tanaka, Koji; Slippers, Bernard; Tabata, Masanobu

doi:10.1163/15685411-00003168

Cited by 2 publications

(4 citation statements)

References 8 publications

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“…Another species, Deladenus (=Beddingia) siricidicola, parasitises S. noctilio and is considered worldwide as a key biological control agent against this pest (Slippers et al, 2012 and references therein). Kanzaki et al (2018) observed that parasitised females of S. nitobei are smaller than healthy individuals and speculate that D. nitobei could have an impact on its host (reduced fecundity or sterility; reduced flight) similar to that of D. siridicicola on S. noctilio. Takatsuka (2007) reports an isolate of the entomopathogenic fungus Beauveria bassiana from S. nitobei in Japan.…”

Section: Conclusion Of Pest Categorisation (Section 4)mentioning

confidence: 94%

“…The parasitic nematode Deladenus nitobei n. sp. (Tylenchomorpha: Allantonematidae) was isolated from S. nitobei in Japan (Kanzaki et al., 2016 , 2018 ). Another species, Deladenus (= Beddingia ) siricidicola, parasitises S. noctilio and is considered worldwide as a key biological control agent against this pest (Slippers et al., 2012 and references therein).…”

Section: Pest Categorisationmentioning

confidence: 99%

“…Kanzaki et al. ( 2018 ) observed that parasitised females of S. nitobei are smaller than healthy individuals and speculate that D. nitobei could have an impact on its host (reduced fecundity or sterility; reduced flight) similar to that of D. siridicicola on S. noctilio . Takatsuka ( 2007 ) reports an isolate of the entomopathogenic fungus Beauveria bassiana from S. nitobei in Japan.…”

Section: Pest Categorisationmentioning

confidence: 99%

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Pest categorisation of Sirex nitobei

Bragard¹,

Baptista²,

Chatzivassiliou³

et al. 2022

EFS2

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The EFSA Panel on Plant Health performed a pest categorisation of Sirex nitobei (Hymenoptera: Siricidae), the nitobe horntail, for the territory of the EU. S. nitobei is not listed in Annex II of Commission Implementing Regulation (EU) 2019/2072 but was identified as a potential regulated pest in a commodity risk assessment of Pinus thunbergii artificially dwarfed plants from Japan. This species is present in Japan (except Hokkaid o), the Republic of Korea and 13 Chinese provinces. S. nitobei attacks several Pinus species and has been reported less frequently on Abies firma and Larix spp., including L. leptolepis. The females oviposit into the sapwood. Eggs are deposited together with a phytotoxic mucus and a symbiotic fungus, Amylostereum areolatum or A. chailletii. The combined action of the venom and the fungus results in the death of the host trees. The fungus degrades the lignocellulosic components of the wood, and the larvae feed on the liquid fraction of the digested residues left by the fungus. All immature stages live in the hosts sapwood. The lifecycle of the pest lasts 1 year. S. nitobei can travel with conifer wood, wood packaging material or plants for planting, but these pathways from third countries are closed by prohibition. However, a derogation exists for artificially dwarfed Japanese black pine (Pinus thunbergii) from Japan, which therefore provides a potential pathway. Climatic conditions in several EU member states and host plant availability in those areas are conducive for establishment. The introduction of S. nitobei is potentially damaging for pines. Phytosanitary measures are available to reduce the likelihood of entry and further spread, and there is a potential for biological control. S. nitobei satisfies all the criteria that are within the remit of EFSA to assess for it to be regarded as a potential Union quarantine pest.

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Section: Conclusion Of Pest Categorisation (Section 4)mentioning

confidence: 94%

Section: Pest Categorisationmentioning

confidence: 99%

Section: Pest Categorisationmentioning

confidence: 99%

See 1 more Smart Citation

Pest categorisation of Sirex nitobei

Bragard¹,

Baptista²,

Chatzivassiliou³

et al. 2022

EFS2

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“…Other studies found that parasitized and non-parasitized females have a similar size, but parasitized males were larger than non-parasitized ones [ 13 , 22 ]. For S. nitobei , Kanzaki et al reported that parasitized S. nitobei females were significantly smaller than non-parasitized ones, but parasitized males were larger than non-parasitized ones [ 23 ]. Over the past sixty years, tethered-flight mills have been developed to measure the flight capacity of insects in controlled settings [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Factors Affecting the Flight Capacity of Two Woodwasp Species, Sirex noctilio F. (Hymenoptera: Siricidae) and Sirex nitobei M. (Hymenoptera: Siricidae)

Liu

Shi

Ren

et al. 2023

Insects

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Sirex noctilio F. is an invasive woodwasp that causes pine mortality in plantations in China. Sirex nitobei M. is a native woodwasp in large areas of China. In this study, the flight capacity of the two woodwasps was studied and compared using a tethered-flight mill system to find individual factors affecting the flight capacity. After flight bioassays, woodwasps were dissected to determine nematode infestation. Post-eclosion-day (PED) age significantly influenced the flight capacity of S. noctilio females and males; as woodwasps become older, their flight capacity decreased. For S. nitobei, PED age did not significantly affect their flight capacity. In general, the flight capacity of S. noctilio was greater than that of S. nitobei. Females flew further and for longer than males for both Sirex species. The Deladenus spp. parasitism status of the two Sirex species did not significantly affect their flight performance parameters. PED age and body mass were key individual factors significantly affecting the flight capacity of the two Sirex species. In this study, detailed and accurate tethered-flight parameters of S. noctilio and S. nitobei were obtained. Although this is different from natural flight, it also provides us substantial laboratory data on their flight capacity, and facilitates risk analysis of the two woodwasp species.

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Some additional bionomic characters of Deladenus nitobei

Cited by 2 publications

References 8 publications

Pest categorisation of Sirex nitobei

Pest categorisation of Sirex nitobei

Factors Affecting the Flight Capacity of Two Woodwasp Species, Sirex noctilio F. (Hymenoptera: Siricidae) and Sirex nitobei M. (Hymenoptera: Siricidae)

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