Simulated roots and host feeding enhance infection of subterranean insects by the entomopathogenic nematode Steinernema carpocapsae

Journal of Invertebrate Pathology
D E EnnisC T Griffin

Abstract

Steinernema carpocapsae can be effective against root-feeding insects despite its reputation as a sedentary ambusher. In pot experiments, using twigs as surrogate roots and pine weevil larvae as targets, we tested the hypothesis that roots serve as physical routeways and conduits of feeding-associated stimuli, thus enhancing the success of S. carpocapsae applied at the surface against subterranean hosts. Insect mortality was lowest (25%) in the absence of plant material, increased to 48% when twigs linked nematodes and insects, and further increased to 69% when the insects were allowed feed on the twigs. This is the first experimental support for the root-routeway hypothesis.

References

Oct 24, 1998·Journal of Invertebrate Pathology·Y Wang, R Gaugler
Aug 18, 2004·International Journal for Parasitology·P TorrM J Wilson

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Citations

Apr 25, 2012·Journal of Chemical Ecology·Sergio RasmannWim H van der Putten
Aug 1, 2015·Journal of Invertebrate Pathology·L A LaceyM S Goettel
Aug 26, 2014·Journal of Invertebrate Pathology·Lanila DemartaIvan Hiltpold
Jun 22, 2018·Insects·Sophie Labaude, Christine T Griffin
Aug 8, 2018·Journal of Economic Entomology·Ivan Hiltpold, Bruce E Hibbard

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