Virulence of three species of entomopathogenic nematodes to the chestnut weevil, Curculio elephas (Coleoptera: Curculionidae)

Ilker Kepenekci, Ayhan Gokce, Randy Gaugler

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Indigenous entomopathogenic nematodes were evaluated in laboratory soil cup experiments as candidates for management of the chestnut weevil, Curculio elephas (Coleoptera: Curculionidae), the most severe insect pest of chestnut in Turkey. Three entomopathogenic nematode species, Steinernema carpocapsae (Anamur strain), S. feltiae (Tur-S3 strain), and Heterorhabditis bacteriophora (Tur-H1 and Tur-H2 strains) (Rhabditida: Steinernematidae, Heterorhabditidae) were bioassayed against last-instar weevils at different temperatures (10, 15, and 25°C) and nematode concentrations (0, 100, 500, and 1000). The steinernematid species were unable to cause lethal weevil infections at 10°C whereas the heterorhabditid strains still induced 21-22% host mortality. The Tur-H2 strain of H. bacteriophora was the most virulent nematode at all temperatures tested, most notably killing 96.5% of weevil larvae at 25°C. LC50 values for the Tur-H2 and Tur-H1 strains of H. bacteriophora at 15°C, the most probable field application temperature, were 266 and 494 infective juveniles, respectively.

Original languageEnglish (US)
Pages (from-to)199-204
Number of pages6
JournalNematropica
Volume34
Issue number2
StatePublished - Dec 1 2004

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science

Keywords

  • Chestnut weevil
  • Curculio elephas
  • Efficacy
  • Heterorhabditis bacteriophora
  • Steinernema carpocapsae
  • Steinernema feltiae

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