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Investigations on alternative substances for control of apple scab - Results from Conidia germinating tests and experiments with plant extracts

Pfeiffer, B.; Alt, S.; Schulz, C.; Hein, B. and Kollar, A. (2004) Investigations on alternative substances for control of apple scab - Results from Conidia germinating tests and experiments with plant extracts. [Untersuchungen zum Einsatz alternativer Stoffe zur Regulierung des Apfelschorfes - Ergebnisse aus Konidienkeimtests und Versuchen zu Pflanzenextrakten.] In: Boos, Markus (Ed.) Ecofruit - 11th International Conference on Cultivation Technique and Phytopathological Problems in Organic Fruit-Growing: Proceedings to the Conference from 3rd February to 5th February 2004 at Weinsberg/Germany, pp. 101-107.

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Summary

The intention of this research project, which was supported within the "Bundesprogramm Ökologischer
Landbau", was to find alternatives for the control of Venturia inaequalis for the organic fruitgrower.
Beside the investigations on reducing the ascospore potential on fallen leaves, experiments
were conducted in laboratory, greenhouses and in orchard to test direct control of scab with different
plant extracts, concentrations and methods of extraction. Extracts from Inula viscosa, Quillaja
saponaria-bark, citrus-species (AGROMIL) and Saponaria officinalis revealed a distinct efficacy
against apple scab in greenhouse studies on apple seedlings. ELOT-VIS, CHITOPLANT, COMCAT,
MOOSEXTRAKT, SILIOPLANT und FZB 24 did not show sufficient efficacy with the application schedule
used for control of scab. Mixtures of Quillaja-saponine and sulphur reduced effectively apple scab
incidence. In an experiment concerning rain stability Citrus-extract and Quillaja-saponine showed a
lower efficacy against scab after a simulated rain of 5 mm. The screening of different supplements
to Citrus-extract as surfactants and adhesives revealed GREEMAX and BIOPLUSS as promising additives.
Both combinations showed an efficacy comparable to copperoxychloride corresponding to
400 g elementary copper per ha.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Apple, organic fruit-growing, Venturia inaequalis, plant extracts, saponins, BÖL, BOEL, FKZ 02OE109
Subjects: Crop husbandry > Crop health, quality, protection
Crop husbandry > Production systems > Fruit and berries
Research affiliation: International Conferences > 2006: Ecofruit
Related Links:http://www.ecofruit.net, http://www.bundesprogramm-oekolandbau.de, http://www.bundesprogramm.de/fkz=02OE109, http://orgprints.org/perl/search/advanced?addtitle%2Ftitle=&keywords=02OE109&projects=BOEL&_order=bypublication&_action_search=Suchen
Deposited By: Tagung, Ecofruit
ID Code:14452
Deposited On:18 Sep 2008
Last Modified:12 Apr 2010 07:38
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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