Wirkung von Quassiaextrakt auf die Apfelsägewespe Hoplocampa testudinea KlugJuttaKienzleauthorJ.ZimmerauthorP.MaxinauthorH.RankauthorH.BathonauthorC.P.W.ZebitzauthorThe efficacy of Quassia extract with a standardized content of Quassin was proved in various field trials in different regions during three years. The amount of Quassin of 6 g/ha/m tree height will be recommended to practice. It is not important to have a contact effect on the eggs. The larvae must feed on the product before they enter the fruit. There is a very good efficacy on primaray infestation. Furthermore, there is even an effi-cacy on secondary infestation. Thus, even if due to difficult conditions during application or not optimal ter-mination of the treatment the efficacy on the primary infestation is not entirely sufficient, the secondary in-festation will be controlled better.Crop health, quality, protectionFruit and berries2006Fördergemeinschaft Ökologischer Obstbau e.V. (FÖKO), Traubenplatz 5, D-74189 WeinsbergConference paper, poster, etc.