Journal
JOURNAL OF APPLIED ENTOMOLOGY
Volume 141, Issue 4, Pages 241-246Publisher
WILEY
DOI: 10.1111/jen.12343
Keywords
biological control; dusky wireworm; Heterorhabditis bacteriophora; Steinernema carpocapsae
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Funding
- Secretaria d'Universitats i Recerca, Departament d'Economia i Coneixement
- DAAM, Generalitat de Catalunya [AGEC2011-00002]
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The susceptibility of the dusky wireworm, Agriotes obscurus (L.) (Coleoptera: Elateridae), to different species and strains of entomopathogenic nematodes was tested in a virulence assay in the laboratory. Larvae were exposed to different nematode doses of 50 and 100IJs/cm(2). At a dose of 50IJs/cm(2), only a commercial strain Heterorhabditis bacteriophora Poinar and the native strain Steinernema carpocapsae (Weiser) B14 caused increased mortality compared with the control (11.1% and 13.3% mortality, respectively). At the higher dose tested, all strains (except Steinernema sp. D122) were virulent to A.obscurus larvae. Steinernema carpocapsae B14 caused higher mortality of wireworm (75.6%) and was used for the assay conducted in cages, with a dose of 100IJs/cm(2), in field conditions. The results showed that S.carpocapsae B14 controlled 48.3% of A.obscurus larvae, demonstrating that some entomopathogenic nematodes have the potential to control larvae of A.obscurus. However, further work is needed to improve their efficacy.
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