9028: Wirkung von Quassiaextrakt auf die Apfelsägewespe Hoplocampa testudinea Klug [Efficacy of Quassia extract on the apple sawfly Hoplocampa testudinea Klug]

Kienzle, Jutta; Zimmer, J.; Maxin, P.; Rank, H.; Bathon, H. and Zebitz, C.P.W. (2006) Wirkung von Quassiaextrakt auf die Apfelsägewespe Hoplocampa testudinea Klug [Efficacy of Quassia extract on the apple sawfly Hoplocampa testudinea Klug]. Poster presented at ecofruit - 12th International Conference on Cultivation Technique and Phytopathological Problems in Organic Fruit-Growing, Weinsberg/Germany, 31.1.-2.2.2006; Published in Boos, Markus, Eds. ecofruit - 12th International Conference on Cultivation Technique and Phytopathological Problems in Organic Fruit-Growing: Proceedings to the Conference from 31st January to 2nd February 2006 at Weinsberg/Germany, page pp. 239-242.

Summary

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 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.

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