Infection Levels of the Microsporidium Larssoniella duplicati in Populations of the Invasive Bark Beetle Ips duplicatus: From Native to New Outbreak Areas
The microsporidium Larssoniella duplicati (Weiser, Holua, Zika, 2006) is a specific pathogen of the bark beetle Ips duplicatus (C.R. Sahlberg, 1836), which is a serious pest of Norway spruce (Picea abies (L.) H. Karst) in Europe. From 2011 to 2016, infection levels of L. duplicati and other pathogens in I. duplicatus populations were assessed along a gradient, ranging from areas in the north, where the beetle is native, to areas in the south, where the beetle has only recently invaded. The 21 study sites ranged in altitude from 229 to 1009 m a.s.l. We found that pathogen infection levels in I. duplicatus populations decreased from the native areas in the north to the new areas of beetle expansion in the south. We also found that pathogen level increased with altitude. The L. duplicati infection levels were not associated with the infection levels of other beetle natural enemies. The infection level decreased with the length of time of beetle establishment in an area. The infection level increased with the number of beetles trapped and dissected at a site.
1.Czech Univ Life Sci Prague, Fac Forestry & Wood Sci, Dept Forest Protect & Entomol, Kamycka 129, CZ-16500 Prague 6, Czech Republic 2.Agr Univ Krakow, Inst Forest Ecosyst Protect, Dept Forest Protect Entomol & Forest Climatol, Aleja Adama Mickiewicza 21, PL-31120 Krakow, Poland 3.Swedish Univ Agr Sci, SLU Dept Ecol, Forest Entomol Unit, Dept Ecol, Box 7044, SE-75007 Uppsala, Sweden 4.Stefan cel Mare Univ Suceava, Fac Forestry, Appl Ecol Lab, Str Univ 13, RO-720229 Suceava, Romania
Recommended Citation:
Zimova, Sona,Resnerova, Karolina,Vanicka, Hana,et al. Infection Levels of the Microsporidium Larssoniella duplicati in Populations of the Invasive Bark Beetle Ips duplicatus: From Native to New Outbreak Areas[J]. FORESTS,2019-01-01,10(2)