How maize root volatiles affect the efficacy of entomopathogenic nematodes in controlling the western corn rootworm?

Ivan Hiltpold, S. Toepfer, Ulrich Kuhlmann, Ted C J Turlings

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Because the ferocious maize pest Diabrotica virgifera virgifera LeConte can adapt to all currently used control strategies, focus has turned to the development of novel, more sustainable control methods, such as biological control using entomopathogenic nematodes (EPN). A good understanding of the biology and behaviour of these potential control agents is essential for their successful deployment. Root systems of many maize varieties emit (E)-β-caryophyllene (EβC) in response to feeding by larvae of the beetle D. v. virgifera. This sesquiterpene has been shown to attract certain species of EPN, thereby enhancing their control potential. In this study, we tested the effect of this root-produced volatile on the field efficacy of the three EPN Heterorhabditis bacteriophora, Heterorhabditis megidis and Steinernema feltiae against D. v. virgifera larvae in southern Hungary. By comparing beetle emergence and root damage for two maize varieties, one that emits EβC and one that does not, it was found that root protection by H. megidis and S. feltiae was higher on the emitting variety, but this was not the case for H. bacteriophora. Overall, all three nematode species showed good control potential. We conclude that, if properly applied and in combination with the right maize variety, the release of these nematodes can be as effective as other control methods.

Original languageEnglish
Pages (from-to)155-162
Number of pages8
JournalChemoecology
Volume20
Issue number2
DOIs
Publication statusPublished - 2010

Fingerprint

Diabrotica virgifera virgifera
entomopathogenic nematodes
Zea mays
nematode
maize
Heterorhabditis megidis
Steinernema feltiae
Heterorhabditis bacteriophora
corn
Beetles
Larva
control methods
Nematoda
beetle
Behavior Control
Hungary
Sesquiterpenes
larva
sesquiterpenoids
root systems

Keywords

  • Biological control
  • Crop protection
  • Diabrotica virgifera virgifera
  • Heterorhabditis bacteriophora
  • Heterorhabditis megidis
  • Nematode attraction
  • Root exudates
  • Steinernema feltiae
  • Tritrophic interaction
  • Zea mays

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Biochemistry

Cite this

How maize root volatiles affect the efficacy of entomopathogenic nematodes in controlling the western corn rootworm? / Hiltpold, Ivan; Toepfer, S.; Kuhlmann, Ulrich; Turlings, Ted C J.

In: Chemoecology, Vol. 20, No. 2, 2010, p. 155-162.

Research output: Contribution to journalArticle

Hiltpold, Ivan ; Toepfer, S. ; Kuhlmann, Ulrich ; Turlings, Ted C J. / How maize root volatiles affect the efficacy of entomopathogenic nematodes in controlling the western corn rootworm?. In: Chemoecology. 2010 ; Vol. 20, No. 2. pp. 155-162.
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