Breeding site segregation and Dutch elm disease fungi carriage percentage of three bark beetle species ( Scolytus esuriens , S. chikisanii, and S. japonicus ) in a Japanese elm tree in Hokkaido, Japan ...

In Japan, three bark beetle species, namely Scolytus esuriens , S. chikisanii , and S. japonicus , have been recently identified as new vectors of Dutch elm disease (DED), although their detailed breeding sites and relation to DED fungi acquisition have not been revealed. We investigated the diameter of branches and a trunk (branch – trunk) at the location of the maternal tunnel (Ømt) and the pupal chamber (Øpc), the distance from the pupal chamber to the bark surface i.e. depth of the pupal chamber (Dpc) on a single Japanese elm tree, and the percentages of bark beetles carrying DED fungi (�D... Mehr ...