Contribution to knowledge of Hylesinus fraxini (Panzer, 1779) (Coleoptera: Scolytidae) natural enemies from Northern Moravia (Czech Republic)
2008
Nakládal, O. | Turčáni, M.
Predation by natural enemies was studied as mortality factors of <I>Hylesinus fraxini</I> in 2006–2007. Predation by birds was not recorded and predation rate by insect reached 0.1%. Only one insect predator was reared – <I>Thanasimus formicarius</I> (Linnaeus, 1758). The total rate of parasitism was 54.0%. At least 8 species of parasitoids from the order Hymenoptera were recorded. The most abundant parasitoid was <I>Eurytoma morio Boheman</I>, 1836 (44.1% from the total number of all reared parasitoids; 23.8% of the total mortality), subsequently <I>Eurytoma arctica</I> Thomson, 1876 (31.7%; 17.1%), <I>Cheiropachus quadrum</I> (Fabricius, 1787) (12.8%; 6.9%), Braconidae (6.3%; 3.4%), <I>Rhaphitelus maculatus</I> Walker, 1834 (3.9%; 2.1%), <I>Mesopolobus</I> sp. (0.5%; 0.3%), were not identified Pteromalidae (0.5%; 0.3%) and <I>Tetrastichus</I> sp. (0.2%; 0.1%).
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