Ein Beitrag zur Fortpflanzungsbiologie des Borkenkäfers Pityogenes chalcographus L

Schwerdtfeger, F.

doi:10.1111/j.1439-0418.1929.tb00113.x

Cited by 28 publications

(17 citation statements)

References 7 publications

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“…It releases aggregation pheromones, a complex system of semiochemicals 22 , to attract male and female conspecifics. It is polygynous where one male can mate with several females, has a high fecundity, and can produce up to three generations per year 20 , 23 . Pityogenes chalcographus might have established thousands of generations of different origin since the end of the last glaciation events, likely reflected in high levels of admixture and low levels of differentiation.…”

Section: Discussionmentioning

confidence: 99%

“…Male beetles initiate host attacks and attract conspecifics using aggregation pheromones 22 . The species is polygynous; two to seven female beetles mate with one single male, and each female lays on average ten to 26 eggs 23 . After subcortical larval and pupal development, and maturation feeding of young beetles on phloem tissue, a new generation of adults disperses to attack fresh hosts.…”

Section: Methodsmentioning

confidence: 99%

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Pleistocene climate cycling and host plant association shaped the demographic history of the bark beetle Pityogenes chalcographus

Schebeck¹,

Dowle²,

Schuler³

et al. 2018

Sci Rep

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Historical climatic oscillations and co-evolutionary dependencies were key evolutionary drivers shaping the current population structure of numerous organisms. Here, we present a genome-wide study on the biogeography of the bark beetle Pityogenes chalcographus, a common and widespread insect in Eurasia. Using Restriction Associated DNA Sequencing, we studied the population structure of this beetle across a wide part of its western Palaearctic range with the goal of elucidating the role of Pleistocene glacial-interglacial cycling and its close relationship to its main host plant Norway spruce. Genetic distance among geographic sites was generally low, but clustering analysis revealed three genetically distinct groups, that is, southern, central/south-eastern, and north-eastern locations. Thus, three key P. chalcographus glacial refugia were identified: in the Italian-Dinaric region, the Carpathians, and the Russian plain, shared with its main host. The current phylogeographic signal was affected by genetic divergence among geographically isolated refugia during glacial periods and postglacial re-establishment of genetic exchange through secondary contact, reflected by admixture among genetic groups. Additionally, certain life history traits, like the beetle’s dispersal and reproductive behaviour, considerably influenced its demographic history. Our results will help to understand the biogeography of other scolytine beetles, especially species with similar life history traits.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Pleistocene climate cycling and host plant association shaped the demographic history of the bark beetle Pityogenes chalcographus

Schebeck¹,

Dowle²,

Schuler³

et al. 2018

Sci Rep

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“…chalcographus is considered as an important spruce pest within Europe, responsible for damages of conifer forests during the last centuries (Ehnström et al 1974, Christiansen et al 1987, Christiansen and Bakke 1988, Eidmann 1992, Göthlin et al 2000, Schroeder 2001, Bouget and Duelli 2004. Mass outbreaks are often in concert with Ips typographus (Coleoptera: Scolytinae) something that facilitates a successful colonization of the host tree (Schwerdtfeger 1929 Pityogenes chalcographus is further associated with blue-stain fungi, mainly Ophiostoma spp. that help their insect vectors to overcome the tree's defence mechanisms (Kirisits 2004).…”

Section: Fig 1 Adult Of Pityogenes Chalcographusmentioning

confidence: 99%

“…chalcographus is a widely distributed pest in Eurasia that infests mainly Picea abies stands (Postner 1974, Pfeffer 1995. Field observations (Avtzis et al 2008) and literature reviews (Schwerdtfeger 1929, Postner 1974, Pfeffer 1995 report that P. chalcographus can also develop on several pine species (Pinus spp.) as well as on the European larch, Larix decidua.…”

Section: Fig 1 Adult Of Pityogenes Chalcographusmentioning

confidence: 99%

Pityogenes chalcographus (Coleoptera, Scolytinae) at the southernmost borderline of Norway spruce (Picea abies) in Greece

Avtzis

Arthofer

Stauffer

et al. 2017

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The six toothed bark beetle, Pityogenes chalcographus L. (Coleoptera: Scolytinae) is a widely distributed pest in Europe, infesting mainly Norway spruce (Picea abies) as well as other conifer species such as Pinus sp., Abies alba, Larix deciduas, L. sibirica and Pseudotsuga douglasii. Even though the distribution of this bark beetle coincides that of its main host tree, P. abies, the occurrence of P. chalcographus has never been recorded in the spruce forest of Elatia-Drama, Northern Greece, which is the southernmost area of the natural, autochthonous distribution of P. abies. In this study we installed five pheromone traps baited with chalcogran dispensers in the forest of Elatia. The total number of bark beetles attracted to these traps exceeded several thousands of individuals. Norway spruce trees growing in the natural forest of Elatia demonstrate low vigor, something that can be attributed to the marginal environmental conditions in concert with the effects of climate change. The combination of these factors inhibits the regular growth of spruce, rendering trees more susceptible to the attack of P. chalcographus.

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“…After subcortical development young beetles emerge to infest new host trees. This bark beetle can produce up to three generations per year ( Schwerdtfeger 1929 , Postner 1974 ).…”

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confidence: 99%

Reproductive Manipulators in the Bark Beetle Pityogenes chalcographus (Coleoptera: Curculionidae)—The Role of Cardinium, Rickettsia, Spiroplasma, and Wolbachia

Schebeck

Feldkirchner

Marín

et al. 2018

Journal of Insect Science

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Heritable bacterial endosymbionts can alter the biology of numerous arthropods. They can influence the reproductive outcome of infected hosts, thus affecting the ecology and evolution of various arthropod species. The spruce bark beetle Pityogenes chalcographus (L.) (Coleoptera: Curculionidae: Scolytinae) was reported to express partial, unidirectional crossing incompatibilities among certain European populations. Knowledge on the background of these findings is lacking; however, bacterial endosymbionts have been assumed to manipulate the reproduction of this beetle. Previous work reported low-density and low-frequency Wolbachia infections of P. chalcographus but found it unlikely that this infection results in reproductive alterations. The aim of this study was to test the hypothesis of an endosymbiont-driven incompatibility, other than Wolbachia, reflected by an infection pattern on a wide geographic scale. We performed a polymerase chain reaction (PCR) screening of 226 individuals from 18 European populations for the presence of the endosymbionts Cardinium, Rickettsia, and Spiroplasma, and additionally screened these individuals for Wolbachia. Positive PCR products were sequenced to characterize these bacteria. Our study shows a low prevalence of these four endosymbionts in P. chalcographus. We detected a yet undescribed Spiroplasma strain in a single individual from Greece. This is the first time that this endosymbiont has been found in a bark beetle. Further, Wolbachia was detected in three beetles from two Scandinavian populations and two new Wolbachia strains were described. None of the individuals analyzed were infected with Cardinium and Rickettsia. The low prevalence of bacteria found here does not support the hypothesis of an endosymbiont-driven reproductive incompatibility in P. chalcographus.

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Ein Beitrag zur Fortpflanzungsbiologie des Borkenkäfers Pityogenes chalcographus L

Cited by 28 publications

References 7 publications

Pleistocene climate cycling and host plant association shaped the demographic history of the bark beetle Pityogenes chalcographus

Pleistocene climate cycling and host plant association shaped the demographic history of the bark beetle Pityogenes chalcographus

Pityogenes chalcographus (Coleoptera, Scolytinae) at the southernmost borderline of Norway spruce (Picea abies) in Greece

Reproductive Manipulators in the Bark Beetle Pityogenes chalcographus (Coleoptera: Curculionidae)—The Role of Cardinium, Rickettsia, Spiroplasma, and Wolbachia

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