Bursaphelenchus pinophilus Brzeski &amp; Baujard, 1997 (Nematoda: Parasitaphelenchinae) associated with nematangia on Pityogenes bidentatus (Herbst, 1783) (Coleoptera: Scolytinae), from the Czech Republic

Čermák, Václav; Vieira, Paulo; Gaar, V.; Čudejková, Mária; Foit, Jiří; Široká, Kateřina; Mota, Manuel

doi:10.1163/156854111x614502

Cited by 6 publications

(3 citation statements)

References 8 publications

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“…Our previous findings showed for the first time an association of B. pinophilus with its insect vector, the bark beetle P. bidentatus (Čermák et al. ).…”

Section: Discussionmentioning

confidence: 87%

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On the genus Bursaphelenchus Fuchs, 1937 (Nematoda: Parasitaphelenchinae) associated with wood and insects from declining forest trees in the Czech Republic

et al. 2013

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SummaryAn overview of the genus Bursaphelenchus in the Czech Republic is presented, based on a recent survey for monitoring the presence of the pinewood nematode, Bursaphelenchus xylophilus, as well as on previous reports of this genus in the country. In addition, we provide a morphological and molecular characterization of four Bursaphelenchus species (B. eremus, B. pinophilus, B. vallesianus and B. borealis) found during the monitoring programme for forest pests, conducted during 2006-2010, within the Moravian and Bohemian regions. Nematodes were extracted from over 1917 insects and 1493 wood samples collected from deciduous and coniferous trees exhibiting wilting and declining symptoms. Bursaphelenchus species were found only in 0.73% of insects and 0.47% of the total number of wood samples. Bursaphelenchus borealis and B. pinophilus dauer juveniles were found associated with the insect vectors Dryocetes autographus and Pityogenes bidentatus, respectively. While a total of seven Bursaphelenchus species are now reported from the Czech Republic, the status of B. xylophilus remains as absent.

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“…Our previous findings showed for the first time an association of B. pinophilus with its insect vector, the bark beetle P. bidentatus (Čermák et al. ).…”

Section: Discussionmentioning

confidence: 87%

“…Dauer juveniles of B. pinophilus were found associated with Pityogenes bidentatus (Herbst) (Čermák et al. ), collected from declining P. sylvestris . The dauer juveniles (Fig.…”

Section: Resultsmentioning

confidence: 99%

On the genus Bursaphelenchus Fuchs, 1937 (Nematoda: Parasitaphelenchinae) associated with wood and insects from declining forest trees in the Czech Republic

et al. 2013

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“…Emergence chambers were checked semiweekly for 100 days, and any live P. juglandis that emerged from branches were dissected by removing and inspecting elytra and disrupting the haemocoel and inspected for nematodes under a stereomicroscope. Dauer juvenile nematodes from elytra (Cardoza et al, 2006; Čermák et al, 2012; Kanzaki et al, 2008; Ryss et al, 2020) were transferred to 20‐ or 30‐day old cultures of G. morbida isolate RN2. Nematode eggs and juveniles from the haemocoel or elytra of dissected beetles were counted under a stereomicroscope.…”

Section: Methodsmentioning

confidence: 99%

Functional roles of nematodes associated with the walnut twig beetle and eastern black walnut in the inland northwest

Williams

Ginzel

2023

Forest Pathology

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Beetles (Scolytinae) form intimate associations with a taxonomically and functionally diverse suite of nematodes that are phytopathogens, fungal feeders, and entomoparasites. Despite their ubiquity, the ecological significance of nematodes in the lifecycles of economically important bark and ambrosia beetle species (Curculionidae: Scolytinae) and associated plant diseases remains largely unexplored. Thousand cankers disease (TCD) is caused by the walnut twig beetle (WTB, Pityophthorus juglandis Blackman) and the fungus Geosmithia morbida (Kolařík, Freeland, Utley & Tisserat; Ascoymycota: Hypocreales) and causes foliar senescence, progressive crown dieback, and mortality in black walnut (Juglans nigra L.) throughout western North America. In this study, nematodes recovered from P. juglandis and J. nigra in Idaho (ID) and Washington (WA) were identified morphologically and by constructing multilocus phylogenies to infer taxonomic relationships to taxa for which molecular data were available. We conducted assays to determine the extent to which nematodes feed and reproduce on G. morbida and other fungi commonly found in galleries of P. juglandis. Inoculation experiments were conducted to determine the effect of nematodes on the area of subdermal necrotic lesions (cankers) caused by G. morbida in branches of mature J. nigra and stems of seedlings. The phoretic nematode Bursaphlenhus juglandis (Ryss, Parker, Alvarez‐Ortega, Nadeler & Subbotin) was frequently found under elytra of WTB in all locations, and a free‐living nematode (Panagrolaimus sp.) was also widespread and found in the bark of mature trees. Both B. juglandis and Panagrolaimus sp. reduced the size of cankers caused by G. morbida in seedlings and branches of mature trees, respectively. However, these species may play opposite roles as disease synergists and antagonists based on the observation that exudates and/or microbiota associated with Panagrolaimus sp., but not B. juglandis destroyed G. morbida colonies in culture. Furthermore, B. juglandis contributed to foliar symptoms in seedlings inoculated with G. morbida. An entomoparasitic nematode (Aphelenchoididae), most closely resembling an Ektaphelenchus sp., was also found in the haemocoel of WTB. Infection rates were positively related to beetle population sizes as inferred from emergence rates. Ditylenchus sp. was also found in incubated walnut wood in WA and Rhabtidolaimus sp. was phoretic on P. juglandis and found in incubated walnut wood in WA and ID. The community of nematodes in J. nigra in WA and ID differed substantially from what has been observed associated with J. nigra in its native range.

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Natural History and Ecology of Bark Beetles

2015

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Bursaphelenchus pinophilus Brzeski & Baujard, 1997 (Nematoda: Parasitaphelenchinae) associated with nematangia on Pityogenes bidentatus (Herbst, 1783) (Coleoptera: Scolytinae), from the Czech Republic

Cited by 6 publications

References 8 publications

On the genus Bursaphelenchus Fuchs, 1937 (Nematoda: Parasitaphelenchinae) associated with wood and insects from declining forest trees in the Czech Republic

On the genus Bursaphelenchus Fuchs, 1937 (Nematoda: Parasitaphelenchinae) associated with wood and insects from declining forest trees in the Czech Republic

Functional roles of nematodes associated with the walnut twig beetle and eastern black walnut in the inland northwest

Natural History and Ecology of Bark Beetles

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