Efficacy of Quassia extract on the apple sawfly Hoplocampa testudinea Klug | Wirkung von Quassiaextrakt auf die Apfelsägewespe Hoplocampa testudinea
2006
Kienzle, Jutta | Zimmer, J. | Maxin, P. | Rank, H. | Bathon, H. | Zebitz, C. P. W.
The 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 efficacy on secondary infestation. Thus, even if due to difficult conditions during application or not optimal termination of the treatment the efficacy on the primary infestation is not entirely sufficient, the secondary infestation will be controlled better.
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