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Development of strategies of resistance and virulence management for the codling moth granulovirus in organic fruit production (ÖkoReVir)
Project
Project code: 2815OE081, JKI-BI-08-1250
Contract period: 01.04.2017
- 31.03.2022
Budget: 362,046 Euro
Purpose of research: Applied research
The current strategy for the control of the codling moth in organic fruit production is based on a combination of different methods (pheromone confusion, codling moth granuloviruses (CpGV), entomopathogenic nematodes, etc.). Products based on CpGV are important for an effective control of codling moth in organic and integrated farming. Due to the occurrence of resistance in nearly 30 orchards in Germany, the successful control of codling moth is not secured. In the past few years new resistance-breaking CpGV isolates have been selected by intensive basic and practice-oriented research. However, new types of resistance were observed in southern and northern Germany. For that purpose further studies on a sustainable and long-term strategy of codling moth control are necessary. The objective of the proposal is to study the occurrence of CpGV resistance and to develop the best strategies of the resistance and virulence management for CpGV in ecological fruit production.
Products based on Cydia pomonella granulovirus (CpGV) are important for an effective control of codling moth (CM) in organic fruit production. Due to the occurrence of resistance against the isolate CpGV-M in nearly 30 orchards in Germany, the successful control of codling moth is of eminent importance. In the past few years new resistance-breaking CpGV isolates have been selected by intensive basic and applied research. However, new types of resistance were observed in Southern and Northern Germany. The Project is carried out in cooperation with the University Hohenheim, the Dienstleistungszentrum Ländlicher Raum – Rheinpfalz (DLR), the Öko-Obstbau Norddeutschland (ÖON e.V.) and the Kompetenzzentrum Obstbau – Bodensee (KOB). In the context of the management of resistance of CM against CpGV-M in 2017, the resistance overcoming CpGV isolates Madex MAX and Madex V14 (Fa. Andermatt Biocontrol AG, Schweiz) have been applied in several organic orchards. Madex MAX has been sprayed against CM of resistance typ I and the new isolate Madex V14 has been applied in orchards with resistance type II. The efficacy of these CpGV preparations was monitored in the field and CM larvae extracted from infested fuits were assayed in direct-tests in the laboratory. The tests confirmed an efficacy of Madex MAX in two of four examined orchards. In all orchards treated with Madex V14 the control of CM was successful. The monitoring and testing of CM populations will continue in 2018. Beetween 2004 to 2006 first CpGV-M resistant CM populations have been identified in Germany. The application of resistant overcoming CpGV products was successful over the past years. In order to avoid the development of new resistance types the resistance level of these populations is verified. In 2017, CM larvae from an untreated orchard identified in 2004 with CpGV resistance were collected for resistance testing. The results showed that the CM population is still resistant to CpGV-M and the resistance level may not have changed.
Section overview
Subjects
- Crop Protection
- Arboriculture
- Organic Farming
Framework programme
Federal Organic Farming Scheme and other forms of sustainable agriculture (BÖLN)
Funding programme
Excutive institution
Participating institutions
Funding institution
Project management agencies
Associated projects: Development of strategies of resistance and virulence management for the codling moth granulovirus in organic fruit production
- Development of strategies of resistance and virulence management for the codling moth granulovirus in organic fruit production
- Development of strategies of resistance and virulence management for the codling moth granulovirus in organic fruit production
- Development of strategies of resistance and virulence management for the codling moth granulovirus in organic fruit production
