Journal of Nematology (2014) 46, 281-286

Laia Batalla-Carrera, Ana Morton, David Shapiro-Ilan, Michael R. Strand and Fernando García-del-Pino (2014)
Infectivity of Steinernema carpocapsae and S. feltiae to larvae and adults of the hazelnut weevil, Curculio nucum: Differential virulence and entry routes
Journal of Nematology 46 (3), 281-286
Abstract: We investigated the existing susceptibility differences of the hazelnut weevil, Curculio nucum L. (Coleoptera:, Curculionidae) to entomopathogenic nematodes by assessing the main route of entry of the nematodes, Steinernema carpocapsae strain B14 and S. feltiae strain D114, into larvae and adult insects, as well as host immune response. Our results suggested that S. carpocapsae B14 and S. feltiae D114 primarily entered adult insects and larvae through the anus. Larvae were more susceptible to S. feltiae D114 than S. carpocapsae B14 and adults were highly susceptible to S. carpocapsae B14 but displayed low susceptibility to S. feltiae D114. Penetration rate correlated with nematode virulence. We observed little evidence that hazelnut weevils mounted any cellular immune response toward S. carpocapsae B14 or S. feltiae D114. We conclude the differential susceptibility of hazelnut weevil larvae and adults to S. carpocapsae B14 and S. feltiae D114 primarily reflected differences in the ability of these two nematodes to penetrate the host.
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Full text of article
Database assignments for author(s): David I. Shapiro-Ilan, Ana Morton, Michael R. Strand

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Curculio nucum	Hazelnut (Corylus)	Spain (continental)
Steinernema carpocapsae/Xenorhabdus nematophila (entomopathogen)	Curculio nucum
Steinernema feltiae/Xenorhabdus bovienii (entomopathogen)	Curculio nucum