DOI: n/a
Resume
The cut-leaf teasel Dlpsacus laciniatus is an invasive weed in severai states of USA and alternative methods for its control are investigated. The cerambycid beetle Agapanthia osmanlls Relche is feeding only on species from Dipsacaceae and it deserves more attention in respect of its potential as biocontrol agent ofthe weed. The species is common in Bulgaria, Turkey, Serbia, Macedonia, Romania. It has one generation per year and overwinters as completely developed larva in the base of the old stems. The phenology was studies in the region of Plovdiv in 2005-2008. The adults emerge in April, feed and mate for a long period before laying eggs individually after stems are being formed. The adults are feeding on the leaves and the apicat parts of the bolting plant while the larvae are tunneling the stem. The feeding by the adults on the rosette could be quite damaging for the plant, causing stunt development and formation of less and smaller seed heads with less seeds. Description of the stages and data about the phenology are given.