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Graillot , Benoit; Blachere , Christine; Besse , Samantha; Siegwart , Myriam; Lopez-Ferber , Miguel (2017)
Publisher: Springer Verlag
Languages: English
Types: Article
Subjects: Biological insecticide, grapholita molesta, [ SDV.BV ] Life Sciences [q-bio]/Vegetal Biology, Cydia pomonella granulovirus, Vegetal Biology, granulosis virus, Grapholita molesta;Cydia pomonella;Cydia pomonella granulovirus;Biological insecticide;Host adaptation, granulovirus, isolat de virus, Host adaptation, Biologie végétale, pyrale asiatique, insecticide biologique, comparaison d'isolats, acceptation de l'hôte, cydia pomonella
Among various Cydia pomonella granulovirus (CpGV) isolates, the Mexican isolate (CpGV-M) has demonstrated a significant ability to reduce damage induced by the oriental fruit moth, Grapholita molesta (Busck) (=Cydia molesta) in peach crops. To obtain a more efficient virus for G. molesta control, an experimental virus population was constructed by mixing various CpGV isolates. This mixture was then selected for replication in a G. molesta laboratory colony. After 12 successive passages on this alternative host, the insecticidal efficacy of the virus population had improved. The concentration of virus occlusion bodies required to kill 90 % of neonate larvae was 450-fold lower than that of the original isolate mixture, and 120-fold lower than that of the CpGV-M isolate alone. Following adaptation to this alternative host, the efficacy against its natural host, the codling moth, C. pomonella, was conserved. This mixed isolate population can be produced on C. pomonella without loss of efficacy, which is useful from a commercial production perspective. This adapted virus isolate mixture is likely to prove more effective than individual component isolates at controlling G. molesta.
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