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20 January 2018 Comparative Assessment of Four Steinernematidae and Three Heterorhabditidae Species for Infectivity of Larval Diabrotica Virgifera Virgifera
Ryan W. Geisert, Dorothy J. Cheruiyot, Bruce E. Hibbard, David I. Shapiro-Ilan, Kent S. Shelby, Thomas A. Coudron
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Abstract

Larval Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae) were exposed to seven different entomopathogenic nematode species to test their potential infectivity in a laboratory setting. Known D. virgifera-infecting nematode species Heterorhabditis bacteriophora Poinar, Heterorhabditis megidis Poinar, Jackson & Klein, Steinernema feltiae Filipjev, and Steinernema carpocapsaeWeiser were tested in a concerted experiment alongside Steinernema diaprepesi Nguyen & Duncan, Steinernema riobrave Cabanillas, Poinar & Raulston, and a Missouri wild-type H. bacteriophora which have not been previously tested on D. virgifera.The species S. rarum Doucet was tested separately for D. virgifera infectivity.Third-instar D. virgifera were exposed to either 60 or 120 nematodes per larva for 6 d. Following exposure, mortality was recorded and larvae were examined to determine the presence of active nematode infections. Results indicated a significantly higher proportion of larvae with active infections from the Heterorhabditidae species and S. diaprepesi than the other Steinernematidae species for both exposure rates; mortality data indicated a similar trend. Steinernema rarum showed almost no infectivity in laboratory experiments.

Published by Oxford University Press on behalf of Entomological Society of America 2018. This work is written by (a) US Government employee(s) and is in the public domain in the US.
Ryan W. Geisert, Dorothy J. Cheruiyot, Bruce E. Hibbard, David I. Shapiro-Ilan, Kent S. Shelby, and Thomas A. Coudron "Comparative Assessment of Four Steinernematidae and Three Heterorhabditidae Species for Infectivity of Larval Diabrotica Virgifera Virgifera," Journal of Economic Entomology 111(2), 542-548, (20 January 2018). https://doi.org/10.1093/jee/tox372
Received: 25 September 2017; Accepted: 12 December 2017; Published: 20 January 2018
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KEYWORDS
entomopathogenic nematodes
Heterorhabditis
Steinernema
western corn rootworm
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