Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Flight behaviour of Ips typographus L. (Col., Scolytidae) in an environment without pheromones. | 591 Ann. For. Sci. 56 1999 591-598 Inra Elsevier Paris Original article Flight behaviour of Ips typography L. Col. Scolytidae in an environment without pheromones Anne J. Franklina b c d Jean-Claude Grégoireb d Centre Luxembourgeois de 1 19 rue de la Fontaine B-6870 Saint-Hubert Belgium bLaboratoire de biologie animate et cellulaire université Libre de Bruxelles CP 160 12 50 av. . Roosevelt B-1050 Brussels Belgium c Fonds pour la formation à la recherche dans Industrie et agriculture d Fonds national de la recherche scientifique Received 4 January 1999 accepted 9 June 1999 Abstract - A mark-recapture experiment with Ips typographus Coleoptera-. Scolytidae was carried out on a 1-ha experimental plot in a healthy spruce stand in Belgium. Recapture of the released beetles was carried out using 96 unbaited standing live trap trees distributed homogeneously over the experimental plot. Less than of the marked beetles were recaptured during three replicates of the experiment. When a pheromone lure was added to one of the trap trees in a fourth replicate the recapture rate rose to nearly 6 . Implications for the beetles dispersal are discussed. Moreover the take-off rates were found to be strongly correlated to weather conditions at emergence correlations between take-off percentages and the number of sunshine hours per day r the average daytime relative humidity r and the cloud cover index at noon r were found to be highly significant P . 1999 Editions scientifiques et medicates Elsevier SAS. Ips typography I Scolytidae bark beetle dispersal flight Resume - Comportement de vol A lps typography dans un environnement sans pheromones. Une experience de lâchers-recap-tures avec Ips typography Coleoptera Scolytidae a été menée sur une parcelle expérimentale d un hectare au sein d un massif d epiceas sans attaques de scolytes en Belgique. Afin d etudier la dispersion à courte distance des scolytes 96 arbres pièges sur pied sans attractifs ont
