@article{PERJU_MOLDOVAN_1990, title={Entomofauna of Centaurea sp. and their economic importance}, volume={20}, url={https://www.notulaebotanicae.ro/index.php/nbha/article/view/273}, DOI={10.15835/nbha201273}, abstractNote={<p>The different species of Centaurea are host of numerous insects: among the most important some are pollinating (<em>Apis melifica</em> L.), the most of them are phytophagous (<em>Larinus obtusus</em>...,<em>Agonopterix liturella</em> Den. et Schiff., <em>Chaetorellia jaceae</em> R. D., <em>Crophora quadrifasciata</em> <em>Meig</em>.) and others are zoophagous (<em>Exeristes roborator</em> F. and <em>Zeuxia cinerea Meig</em>.). The plant root is harmed by the larvae of <em>Pelochrista medulana</em> Stgr., the stalk is mined by the caterpillars of <em>Agonopterix liturella</em> Den. et Schiff., and the flowers and seeds are destroyed by the larvae of <em>Larinus obtusus Gyll</em>., <em>Eucosoma hohenwartina </em>Den. et Schiff., E<em>. aemulana Schlang.</em>, <em>Chaetorellia jaceae</em> R.D. and <em>Urophora quadrifasciata</em> <em>Meig</em>. Due to the population density and to the caused damages, the species <em>Agonopterix liturella</em> Den. et Schiff., <em>Larinus obtusus Gyll</em>., <em>Chaetorellia jaceae</em> R.D. and <em>Urophora quadrifasciata Meig</em>., are these who present a practical importance as agents of biological control of the knapweed species, especially <em>Centaurea phrygia</em>. On the whole, considering the seed losses caused only by the seed weevil (<em>Larinus obtusus Gyll</em>.) and by tephritids flies of the knapweed seeds (<em>Chaetorellia</em> sp. and <em>Urophora</em> sp.) these are estimated to 50-60 %.</p>}, number={1}, journal={Notulae Botanicae Horti Agrobotanici Cluj-Napoca}, author={PERJU, Teodosie and MOLDOVAN, I.}, year={1990}, month={Aug.}, pages={45–53} }