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| Kienzle, J.; Zimmer, J.; Klopp, K.; Maxin, P.; Yamada, K.; Bathon, H.. |
| The effects of Quassia extract on eggs and larvae of the apple sawfly Hoplocampa testudinea were studied in the laboratory. The efficacy of this extract was mainly due to an oral toxicity to neonate sawfly larvae. The main active ingredients, Quassin and Neoquassin, were tested sepa-rately as pure substances. While Quassin had a considerable efficacy also on older larvae, Neo-quassin was less efficient in this case. Since Quassin and Neoquassin were found in different Quassia sources in varying relations to each other and had different efficacy, they have to be considered separately in the definition of extract quality by the content of active ingredients. This requires the application of Quassia extracts before larval hatch. It was shown that low... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection "Organics" in general Fruit and berries. |
| Ano: 2005 |
URL: http://orgprints.org/4277/1/4003.pdf |
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| Maxin, P.; Klopp, K.; Fieger-Metag, N.. |
| In general, organic grown apples (Malus x domestica Borkh.) are not treated with chemical fungicides to prevent storage decay and these fruits may suffer up to 30% decay during storage. Preliminary experiments had shown that hot water dipping of apples may be an alternative. To inhibit Gloeosporium rot (Pezicula alba, P. malicortis) water temperature may be of about 50°C and dipping time from 60 sec up to 180 sec. The present investigation was conducted to test different ranges of temperatures and dipping time periods in different apple cultivars over a three year investigation. The objective was to determinate the suitable hot water treatment that prevents decay incidence and maintains fruit quality (firmness, scale symptoms). For the reduction of post... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health Fruit and berries. |
| Ano: 2005 |
URL: http://orgprints.org/4276/1/4002.pdf |
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| Kienzle, J.; Zimmer, J.; Klopp, K.; Maxin, P.; Yamada, K.; Bathon, H.; Zebitz, C.P.W.; Ternes, P.; Vogt, H.. |
| Ziel des Projekts war es, die bestehenden großen Unsicherheiten bezüglich Qualität und Terminierung, Kombinationsmöglichkeit mit anderen Präparaten sowie Nebenwirkungen auf die Blutlauszehrwespe und andere Nützlinge des traditionell zur Regulierung der Sägewespe eingesetzten Quassiaholzauszuges auszuräumen. Des weiteren sollten mögliche Managementstrategien für eine Förderung der Blutlauszehrwespe auf ihre Praxistauglichkeit überprüft und gegebenenfalls optimiert werden. Folgende Erkenntnisse wurden aus dem Projekt gewonnen und sind für die Praxis relevant: - Quassia wirkt vor allem auf die Larven der Apfelsägewespe. Wichtig ist daher, dass Quassia ausgebracht wird, bevor die ersten Larven schlüpfen. Das Eistadium zum Ausbringtermin ist nicht von... |
| Tipo: Report |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2003 |
URL: http://orgprints.org/15735/1/15735%2D02OE084%2Dble%2Djki%2D2003%2Dapfelsaegewespe_blutlaus.pdf |
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