Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: Contribution to knowledge of Hylesinus fraxini (Panzer, 1779) (Coleoptera: Scolytidae) natural enemies from Northern Moravia (Czech Republic). | JOURNAL OF FOREST SCIENCE 53 2007 Special Issue 53-56 Contribution to knowledge of Hylesinus fraxini Panzer 1779 Coleoptera Scolytidae natural enemies from Northern Moravia Czech Republic O. Nakládal M. Turcáni Faculty of Forestry and Wood Sciences Czech University of Life Sciences Prague Prague Czech Republic ABSTRACT Predation by natural enemies was studied as mortality factors of Hylesinusfraxini in 2006-2007. Predation by birds was not recorded and predation rate by insect reached . Only one insect predator was reared - Thanasimusformicarius Linnaeus 1758 . The total rate of parasitism was . At least 8 species of parasitoids from the order Hymenoptera were recorded. The most abundant parasitoid was Eurytoma morio Boheman 1836 from the total number of all reared parasitoids of the total mortality subsequently Eurytoma arctica Thomson 1876 Cheiropachus quadrum Fabricius 1787 Braconidae Rhaphitelus maculatus Walker 1834 Mesopolobus sp. were not identified Pteromalidae and Tetrastichus sp. . Keywords predators parasitoids natural enemies bark beetles Hylesinus fraxini Thanasimus formicarius Cheiro-pachus quadrum Eurytoma morio Eurytoma arctica Czech Republic Central Europe Hylesinus fraxini Panzer 1779 is a bark beetle attacking mainly logs with thin and smooth bark of the ash-trees in the Czech Republic. Here was made no detailed quantitative research of its natural enemies. However such a quantitative study of parasitoids was made in south Spain by Lozano and Campos 1991 . Mainly due to easy rearing of this bark beetle it was made some interesting bionomic study with it and its parasitoids. Mills 1991 studied searching strategies and attack rates of parasitoids and its relevance to biological control. Lozano et al. 1994 studied the role of the parasitism and intraspecific competition in the population dynamics of the bark beetle. Campos and Lozano 1994 on H. fraxini researched .
