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Bark beetles (Scolytidae, Coleoptera) on spruce in the Bohemian Forest
Zelený, Jiří ; Doležal, Petr
The article summarized part of data, that were obtained during 6 years lasting research focused on bark beetles and their natural enemies in the Bohemian Forest (Šumava Mts). 26 species of bark beetles were collected from spruce samples that were brought from Modrava, Srní, Kvilda, Borová Lada etc. Despite many abundant pest species like Ips typographus, Ips amitinus, Pityogenes chalcographus a Polygraphus polygraphus, also three uncommon species were collected: Pityogenes conjunctus, Pityophthorus micrographus a Xyloterus laeve. These three species may have importance for nature conservation.
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Natural enemies of bark beertle Ips typographus
Zelený, Jiří ; Lozan, Aurel
Totally 49 species of predators and 22 species of parasitoids are contributing to the population regulation of bark beetles, namely Ips typohraphus, in spruce forest of the Czech republic. The most encountered predators of bark beetles in our samples during 1998-2003 were: Thanasimus formicarius (Coleoptera), Medetera signaticornis and Lonchaea bruggueri (Diptera): hymenopteran parasitoids: Coeloides bostrichorum, Dendrosoter middendorfii, Cosmophorus klugii (Braconidae): Rhopalicus tutela, Roptrocerus xylophagorum, Tomicobia seitneri a Dinotiscus eupterus (Pteromalidae). The siricid wasp Ibalia leucospoides (Cynipoidea, Ibaliidae) is recorded too.
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