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Good parasitic wasps gone bad: a short review of two stories of the oceanic and habitat islands
Lozan, Aurel ; Spitzer, Karel ; Jaroš, Josef
Braconid parasitoid Cotesia glomerata, which was accidentally introduced into Canary Islands became real threat to the Canary Island Large White butterfly (Pieris cheiranthi). The multiple confirmation of the origin of the introduced parasitoid (morphology, DNA, ecology) suggests that these opportunistic parasitoids might be a serious danger to native isolated fauna. Such model relationships can be found in isolated paleorefugial habitats of the central European peat bogs, which are historical habitat islands of unique local taxa. A recent discovery of some opportunistic parasitoids attacking tyrphobiontic Lepidoptera in several isolated bogs of South Bohemia suggest these wasps might invade isolated habitats and cause serious population destruction of paleorefugial hosts.
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Přirození nepřátelé lýkožrouta Ips typographus
Zelený, Jiří ; Lozan, Aurel
Studie uvádí přehled 49 druhů predátorů a 22 druhů parazitoidů, kteří se v horských smrčinách České republiky podílejí na snižování populační hustoty kůrovců, především lýkožrouta smrkového (Ips typographus). V letech 1998-2003 byly nejčastějšími bioregulátory kůrovců predátoři: Thanasimus formicarius (Coleoptera), Medetera signaticornis a Lonchaea bruggueri (Diptera): a parazitoidi, Hymenoptera: Coeloides bostrichorum, Dendrosoter middendorfii, Cosmophorus klugii (Braconidae): Rhopalicus tutela, Roptrocerus xylophagorum, Tomicobia seitneri a Dinotiscus eupterus (Pteromalidae). Byl nalezen i parazitoid čel. Siricidae:Ibalia leucospoides (Cynipoidea, Ibaliidae).
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