feeding tunnels of a great capricorn beetle, cerambyx cerdo, in the wood of a pedunculate oak

beetle bug burrow capricorn cerambycidae cerambyx cerdo characteristic close common conservation damage damaged ecosystem eichenbock english environment eradication european evaluation feeding forfeiture great großer grub harm harmed heldbock hole host indication infestation insect larva larval longhorn longicorn macro nature oak parasite pedunculate pest plant protection quercus robur superovulation symptom tree trunk tunnel tunnels vermin wood