Effect perfectly - capitulation to the enemy

I wanted to save the agent my nearly 10-year-old book-hedge, in an illegal immigrant raged: the cydalima perspectalis. Although the agent acts once perfect, the caterpillars die. However, there are in the neighborhood more hedges that remain untreated and thus there is pest offspring without end. So often you can not spray, to rescue the hedge. In the coming year I save the money, tear the book out there and plant privet or similar stuff.