Investigating Stands That Are Susceptible Against Ips typographus (L.) (Coleoptera: Curculionidae) by Frequency Ratio Method in Hatila Valley National Park, Artvin
Abstract
Ips typographus that was first discovered in 1984 in Artvin spruce forests is one of the most destructive bark beetles of spruce forests. The beetle in its distribution in Europe and Turkey has killed millions of trees. Today, it has an endemic population in Artvin spruce forest except for a limited area. In this study, 835.5 ha forest area have been examined where the beetle had an outbreak formerly in Hatila Valley National Park. Population of the beetle was monitored during the flight period in 2014 by 105 pheromone traps. Traps were baited with pheromone dispensers at the end of April and checked every 15 days until the end of September. Pheromone traps were installed in pure spruce stands or spruce dominated mixed stands between the altitudes 1265-2100 m a.s.l., in different aspects and different distances to forest roads. Altitude, slope, aspect, distance to forest roads, stand type and beetle density parameters were used to produce susceptibility map of the surveyed area. As a result, in this study scale, it’s found that pure spruce stands that are in south aspect, between 1800-2000 m, 30o-45o slope and that are in the first 150 m to stand edge are the most susceptible areas, and a susceptibility map is produced.
Keywords
Ips typographus,Hatila Valley National Park,stand susceptibility
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