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Bekämpfung der Blutlaus durch Freilassung von Blutlauszehrwespen aus Massenzucht

{Project} Bekämpfung der Blutlaus durch Freilassung von Blutlauszehrwespen aus Massenzucht. [Control of Woolly Apple Aphid by releasing Aphelinus mali from artificial rearing.] Runs 2004 - 2006. Project Leader(s): Zimmer, Dipl.-Ing. Jürgen and Hetebrügge, Dipl.-Ing. Katrin, Dienstleistungszentrum Ländlicher Raum - Rheinpfalz, D-Bad Neuenahr-Ahrweiler .

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Ziel des Projektes war die Erarbeitung eines Verfahrens zur Regulierung der Blutlaus (Eriosoma lanigerum HAUSM.), eines wirtschaftlich bedeutenden Schädlings im ökologischen Obstbau, gegen den es momentan keinerlei wirksame Bekämpfungsmöglichkeiten gibt. Hierzu wurde versucht, aus der Erfahrung vorangegangener Versuchsergebnisse ein Verfahren zur Bekämpfung der Blutlaus durch den Einsatz von Blutlauszehrwespen (Aphelinus mali L.) aus einer Nützlingszucht zu entwickeln und zur Praxisreife zu bringen. Die Zehrwespe ist ein natürlich vorkommender Gegenspieler, dem es aufgrund mangelnder Synchronisation zwischen Schädling und Nützling nicht rechtzeitig gelingt, den Schaden durch die Blutlaus zu verhindern.
Schwerpunkt des Projektes war die Entwicklung und Optimierung des Ausbringungsverfahrens und der Ausbringungsmodalitäten von Blutlauszehrwespen aus einer Nützlingszucht zur Bekämpfung der Blutlaus. Hierbei sollten auch betriebswirtschaftliche Gesichtspunkte berücksichtigt werden.
Die Produktion der Blutlauszehrwespen erfolgte bei der Firma Katz Biotech in Baruth.

Summary translation

The woolly apple aphid has been recognised as a serious pest in organic apple growing for some years and is still hardly to control. Therefore the main aim of this project was to develop a strategy to control the woolly apple aphid in practical fruit growing situation.
A. mali is a natural antagonist of woolly apple aphid. Releasing parasitized mummies on paper cards has not been successful in 2004. Also the production of parasitized mummies has been difficult and their storage led to high mortalities and delayed hatching. The releasing of adult A. malis in 2005 showed better results in controlling the aphid population than using mummies but the released A. mali were still not able to control woolly apple aphid completely. The fertility of A. mali depends on temperature and light intensity. Usually the weather conditions in this latitude in spring are not optimal conditions for A. mali. Therefore it is ineffective to released A. mali in spring because of low reproduction rates. In 2006 A. mali were released in addition with preceding oil application. The application of TS-forte (wetting agent based on vegetable oil) in early spring reduced the growth of the aphid population. A. mali were released later when climatic conditions were suitable. Possible phytotoxic effects, however, must be taken into consideration when using the oil preparation.
A. mali is able to reduce the woolly apple aphid population in summer, but because of a lack of synchronisation between host and beneficial insect, A. mali is not able to prevent the damage caused by woolly apple aphid.
Lime sulphur has a high contact toxicity on A. mali, but it does not influence the population in the orchard.
Artificial rearing of A. mali is possible, but much more expensive than 250€/ha which was set as a price limit.

EPrint Type:Project description
DLR Rheinpfalz, KoGa Ahrweiler, Walporzheimer Str. 48, 53474 Bad Neuenahr-Ahrweiler
BBA, Heinrichstr. 243, 64287 Darmstadt
KÖN, Moorende 53, 21635 Jork
KOB, Schumacherhof 6, 88213 Ravensburg-Bavendorf
Beratungsdienst ökologischer Obstbau, Schumacherhof 6, 88213 Ravensburg-Bavendorf
Keywords:BÖL, BOEL, FKZ 03OE524/1, Aphelinus mali, Blutlaus, Eriosoma lanigerum HAUSM., ökologischer Obstbau, Bekämpfung, Blutlauszehrwespen, Schädlinge, Nützlinge
Subjects: Crop husbandry > Crop health, quality, protection
Crop husbandry > Production systems > Fruit and berries
Research affiliation: Germany > Federal States > Rheinland-Pfalz > DLR
Germany > Federal Organic Farming Scheme - BOELN > Plants > Pflanzenschutz
Research funders: Germany > Federal Organic Farming Scheme - BOELN
Germany > Federal Agency for Agriculture and Food - BLE
Related Links:http://www.bundesprogramm-oekolandbau.de
Project ID:FKZ 03OE524/1
Start Date:1 March 2004
End Date:31 December 2006
Deposited By: Zimmer, Dipl. - Ing. Jürgen
ID Code:15180
Deposited On:20 May 2009
Last Modified:01 Aug 2018 14:27

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