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Susceptibility of cockroaches (Gromphadorhina portentosa, Nauphoeta cinerea and Blaptica dubia) exposed to entomopathogenic nematodes

Cutler, J and Hughes, K and Rae, R (2017) Susceptibility of cockroaches (Gromphadorhina portentosa, Nauphoeta cinerea and Blaptica dubia) exposed to entomopathogenic nematodes. Biocontrol Science and Technology, 27 (4). pp. 556-564. ISSN 0958-3157

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Susceptibility of cockroaches (Gromphadorhina portentosa, Nauphoeta cinerea and Blaptica dubia) exposed to entomopathogenic nematodes.pdf - Accepted Version
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Abstract

Cockroaches are major pests, vectors of pathogenic bacteria and induce allergies. Current control methods use chemical pesticides, but they can be ineffective and costly and there are reports of resistance in the field; hence new control methods are needed. There are conflicting reports about the susceptibility of cockroaches to entomopathogenic nematodes (EPNs); so we investigated if EPNs could kill several diverse cockroach species, including the Madagascan hissing roach (Gromphadorhina portentosa), the Lobster roach (Nauphoeta cinerea) and Blaptica dubia. Female adult cockroaches were exposed to either commercial products containing Steinernema kraussei or a combination of Heterorhabditis spp. and Steinernema spp. at 50 and 150 nematodes per cm2 for 21 days. We also monitored feeding and the numbers of infective juveniles that were produced from each cockroach corpse. We found that S. kraussei were harmless to all cockroach species (at both doses) but when exposed to a mixture of Heterorhabditis spp. and Steinernema spp. B. dubia died after 6 days and its feeding was strongly inhibited. We also found that the mixture of Heterorhabditis spp. and Steinernema spp. could proliferate in the cadavers of B. dubia whilst S. kraussei could only reproduce in G. portentosa and B. dubia but not N. cinerea. In conclusion, S. kraussei was harmless to all three cockroach species but B. dubia was killed when exposed to Heterorhabditis spp. and Steinernema spp., highlighting the differences in the host range of EPNs.

Item Type: Article
Additional Information: This is an Accepted Manuscript of an article published by Taylor & Francis in Biocontrol Science and Technology on 2nd May 2017, available online: http://www.tandfonline.com/10.1080/09583157.2017.1321734
Uncontrolled Keywords: 1001 Agricultural Biotechnology, 0501 Ecological Applications, 0502 Environmental Science And Management
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > QH Natural history
Q Science > QL Zoology
Divisions: Natural Sciences and Psychology
Publisher: Taylor & Francis
Related URLs:
Date Deposited: 02 Nov 2017 12:08
Last Modified: 02 Nov 2017 12:08
DOI or Identification number: 10.1080/09583157.2017.1321734
URI: http://researchonline.ljmu.ac.uk/id/eprint/7470

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