Infectivity of steinernema carpocapsae and S. feltiae to larvae and adults of the hazelnut weevil, curculio nucum: Differential virulence and entry routes

Laia Batalla-Carrera, Ana Morton, David Shapiro-Ilan, Michael R. Strand, Fernando García-del-Pino

Research output: Contribution to journalArticleResearchpeer-review

7 Citations (Scopus)

Abstract

© The Society of Nematologists 2014. 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.
Original languageEnglish
Pages (from-to)281-286
JournalJournal of Nematology
Volume46
Issue number3
Publication statusPublished - 1 Jan 2014

Keywords

  • Curculionidae
  • Entry routes
  • Immune response
  • Penetration rate
  • Steinernema carpocapsae
  • Steinernema feltiae

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