TAILIEUCHUNG - Báo cáo khoa học: " Dispersal and flight behaviour of lps sexdentatus (Coleoptera: Scolytidae) in pine forest"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: " Dispersal and flight behaviour of lps sexdentatus (Coleoptera: Scolytidae) in pine forest. | Ann Sci For 1991 48 417-428 Elsevier INRA 417 Original article Dispersal and flight behaviour of Ips sexdentatus Coleoptera Scolytidae in pine forest H Jactel INRA Centre de Recherches d Orleans Station de Zoologie Forestiere Ardon 45160 Olivet France Received 30 October 1990 accepted 6 March 1991 Summary The dispersal range and the flight behaviour of Ips sexdentatus in pine forest were studied using mark-recapture experiments. 9 614 beetles were marked by the elytra engraving method and released just after emergence. They were caught at different distances in pheromone baited traps. Less than 10 of the beetles failed to take off. Flyers were captured at distances up to 4 km. The main dispersal occurred during the first day. When wind speed rose 3 m s beetles were mainly caught in the upwind direction at the shortest trapping distances and mainly in the downwind direction at the longest trapping distances. For the same trap density the number of beetles captured increased with trapping distance. This was interpreted as a flight exercise requisite prior to chemotropic orientation. The trapping attraction radius was estimated at 80 m. These findings bring into question the use of the pheromone trapping system for the control and prognosis of Ips sexdentatus. Ips sexdentatus I bark beetle pine I mark recapture dispersal flight behaviour pheromone attraction Résumé Dispersion et comportement de vol d ps sexdentatus Coleoptera Scolytidae en foret de pin Sylvestre. Des experiences de lâcher-recapture ontpermis d etudier la dispersion etle comportement de vol dips sexdentatus en foret de pin Sylvestre. Neufmille six cent quatorze scoly-tides ont été marques par gravage des élytres et laches juste après emergence. Ils ont été recaptures à distances croissantes par un nombre égal OU croissant de pièges à pheromone. Trois à dix-huit pour cent des scolytides se sont révélés incapables de s envoler tableau I . Les autres ont été recaptures jusqu a 4 km du point de lãcher. .

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