Large poplar longhorned beetle - Saperda carcharias
Symptoms / species
Impact / measures
Feeding of larvae at first in the phloem, then deep in the wood; oval tunnels, extending in vertical direction in the stem, up to 20cm in length, tough shavings; blackish intumescences in lower stem parts of young poplars, as well as on branches of older trees; whitish larva up to 4cm in size, with horn-like dots; beetle 22-30cm in length, yellow and intensily haired; maturation feeding of the beetles on the leaves in summer.
Affected tree species
Young trees die off, otherwise increased risk of breakage
Curative measures Removal of dead trees and the whole plant material; if old trees are attacked, the thickness of the remaining wall should be checked.
Large poplar longhorned beetle: black cracks and slight intumescences at the stem base
Large poplar longhorned beetle: opened bore whole on the stem with tough shavings