@article {13232,
	title = {Feeding habits of Pityogenes chalcographus (L.) (Coleoptera: Scolytinae) on Norway Spruce (Picea abies) L. (Karst.) logging residues in wind-damaged stands in southern Poland},
	journal = {International Journal of Pest Management},
	volume = {58},
	number = {2},
	year = {2012},
	month = {2012},
	pages = {121-130},
	abstract = {The effect of deposition of logging residues (e. g. cut branches and tree tops) on infestation density and reproductive efficiency of the smaller European (six-toothed) spruce bark beetle, Pityogenes chalcographus (L.) (Coleoptera: Scolytinae), was studied on Norway Spruce (Picea abies) L. (Karst.) stands in southern Poland. It was found that such materials, originating from windbreaks and windfalls and spread loosely over the forest floor, were more readily infested by P. chalcographus than materials gathered in piles. However, the beetles achieved a significantly higher reproductive efficiency (number of new generation beetles per each parent individual) on branches in piles than on those spread loosely. In piles, the P. chalcographus infestation density, measured as the total number of individuals per square decimetre of bark area, and reproductive efficiency varied, depending on the location of the branches in a pile. The most favourable breeding conditions occurred in the middle layer of a pile. It was also found that at different infestation densities the method and placement of woody debris deposition did not affect the number of beetles that emerged. These results are discussed in the context of using logging residues as natural traps for bark beetles.},
	keywords = {Pityogenes chalcographus},
	isbn = {0967-0874},
	author = {Kacprzyk, Magdalena}
}
@article {9373,
	title = {Lack of genetic differentiation after host range extension argues for the generalist nature of Pityogenes chalcographus (Curculionidae: Scolytinae)},
	journal = {Annals of Forest Science},
	volume = {69},
	number = {3},
	year = {2012},
	month = {Apr},
	pages = {313-323},
	abstract = {The bark beetle, Pityogenes chalcographus, is one of the main pests in Picea abies stands, and it has also been found on other European Pinaceae species. With massive introductions of North American conifer species into European forests, this insect has extended its host range to exotic Pinaceae species. This study assessed whether a wider host range has influenced the genetic structure of P. chalcographus and has led to host specialization. Insects were collected from two different regions of France, where eight native and exotic conifer species coexist and were analyzed using mitochondrial and nuclear genetic markers. Considerable haplotypic diversity was observed within the regions and within host species from where P. chalcographus populations were collected. No genetic differentiation, especially with respect to host species associations, could be detected. Moreover, no relationship could be established between closely related P. chalcographus haplotypes and taxonomically related conifer species. The capacity of P. chalcographus for host shifting and dispersal may have played a key role in the rapid extension of its host range. These findings are important for pest management in forests and health and phytosanitary measures in the timber trade, especially for risk assessment in mixed coniferous forests including tree species of major economic importance.},
	keywords = {Pityogenes chalcographus},
	isbn = {1286-4560; 1297-966X},
	author = {Bertheau, Coralie and Bankhead-Dronnet, Stephanie and Martin, Carine and Lieutier, Francois and Roux-Morabito, Geraldine}
}
