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Article Dans Une Revue Viruses Année : 2016

Biological characteristics of experimental genotype mixtures of Cydia pomonella Granulovirus (CpGV): Ability to control susceptible and resistant pest populations

Résumé

The detection of resistance in codling moth (Cydia pomonella) populations against the Mexican isolate of its granulovirus (CpGV-M), raised questions on the sustainability of the use of this biological insecticide. In resistant host cells, CpGV-M is not able to complete its replication cycle because replication is blocked at an early step. Virus isolates able to overcome this resistance have been characterized-among them, the CpGV-R5 isolate. In mixed infections on resistant insects, both CpGV-M and CpGV-R5 viruses replicate, while CpGV-M alone does not induce mortality. Genetically heterogeneous virus populations, containing 50% of each CpGV-M and CpGV-R5 appear to control resistant host populations as well as CpGV-R5 alone at the same final concentration, even if the concentration of CpGV-R5 is only half in the former. The use of mixed genotype virus preparations instead of genotypically homogeneous populations may constitute a better approach than traditional methods for the development of baculovirus-based biological insecticides.
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hal-01594837 , version 1 (20-11-2019)

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Benoit Graillot, Sandrine Bayle, Christine Blachère-Lopez, Samantha Besse, Myriam Siegwart, et al.. Biological characteristics of experimental genotype mixtures of Cydia pomonella Granulovirus (CpGV): Ability to control susceptible and resistant pest populations. Viruses, 2016, 8 (5), 12 p. ⟨10.3390/v8050147⟩. ⟨hal-01594837⟩
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