Patterns of Ips cembrae(Herr)infestation on trap and standing trees of European larch(Larix decidua Mill.)  

作　　者：Jakub Špoula Emanuel Kula 

机构地区：[1]Faculty of Forestry and Wood Technology,Department of Forest Protection and Wildlife Management,Mendel University in Brno,Zemědělská3,Brno 61300,Czech Republic

出　　处：《Journal of Forestry Research》2023年第6期2041-2050,共10页林业研究（英文版）

基　　金：supported by Ministry of Agriculture of the Czech Republic in grant[QK1920433].“Influence of protective measuresagainst the populations of bark beetles according to population density”。

摘　　要：The large larch beetle,Ips cembrae,is a significant pest causing the death of larch.In 2020,the attack density of I.cembrae on larch trap trees and standing trees was evaluated using sample sections placed along the trunk.As a defensive measure against I.cembrae,trap trees were highly effective in both spring and summer.The attack density increased with increasing trap tree surface area/volume.Galleries were established evenly throughout the entire trunk including the thin upper portion.When the number of trap trees was low and their capacity full,a continual aggregation of adults occurred due to pheromone communication,leading to attacks on healthy standing trees in the immediate vicinity.It was found that I.cembrae attacked standing trees from the trunk base,with a continual colonization of the stem up to 70%of the tree height in a time-differentiated progression of development stages.The attack density of I.cembrae on standing trees was up to 40%lower than on the trap trees.

关 键 词：Forest protection Ips cembrae Larix decidua Stem infestation Trap tree 

分 类 号：S791.22[农业科学—林木遗传育种]