Phloeosinus thujae (Perris) i Ph. aubei (Perris) (Coleoptera, Scolytidae) - prouzrokovači sušenja izbojaka kleke, tuje i čempresa

Abstract

Radi dopunske ishrane i prezimljavanja, imaga Ph. thujae i Ph. aubei ubušuju se u izbojke kleke, tuje i čempresa, zbog čega se oni savijaju i suše. Pri jačem napadu broj osušenih izbojaka jako je veliki, te napadnute biljke fiziološki slabe, slabije rastu i vidno gube na svojoj dekorativnosti. Kako Ph. thujae i Ph. aubei najveći deo svog razvića provode pod korom fiziološki oslabelih i sveže posečenih stabala i sadnica, u cilju njihovog suzbijanja najbolje je primeniti uklanjanje i spaljivanje naseljenog materijala. Takođe, radi sprečavanja njihove pojave iz rasadnika, bašta i sa javnih zelenih površina, potrebno je blagovremeno ukloniti i sav materijal koji je pogodan za njihovo naseljavanje. Međutim, ukoliko navedene mere nisu sprovedene, imaga ovih vrsta potkornjaka moguće je uspešno suzbijati i primenom insekticida u vreme njihovog rojenja.

For additional nourishment and hibernation, the adult Ph. thujae and Ph. aubei tunnel into the shoots of juniper, arbor vitae and cypress, causing their bending and dying. Under a more intensive attack, the number of dead shoots is very high. The attacked plants weaken physiologically, grow less vigorously and lose the ornamental appearance visibly. As Ph. thujae and Ph. aubei spend the greatest part of their development under the bark of the physiologically weakened and freshly felled trees and seedlings, the recommended method of their suppression is the removal and burning of the infested material. Also, to prevent their appearance, in the nurseries gardens and public green spaces in time, it is necessary to remove all the material favorable for their infestation. However, if the above measures have not been performed, the adults of the above species can be successfully controlled by the application of insecticides at the time of their swarming.