Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/7251
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Age-related cannibalism and horizontal transmission of a nuclear polyhedrosis virus in larval Spodoptera frugiperda
Authors: Chapman, Jason W
Williams, Trevor
Escribano, Ana
Caballero, Primitivo
Cave, Ronald D
Goulson, Dave
Contact Email: dave.goulson@stir.ac.uk
Keywords: Cannibalism
Lepidoptera
nuclear polyhedrosis virus
pathogen transmission
Spodoptera frugiperda
Issue Date: Aug-1999
Publisher: Wiley
Citation: Chapman JW, Williams T, Escribano A, Caballero P, Cave RD & Goulson D (1999) Age-related cannibalism and horizontal transmission of a nuclear polyhedrosis virus in larval Spodoptera frugiperda, Ecological Entomology, 24 (3), pp. 268-275.
Abstract: 1. Experiments were carried out to investigate the incidence of cannibalism throughout the larval development of the noctuid moth Spodoptera frugiperda, and to examine the risk of infection from consuming conspecifics infected with a nuclear polyhedrosis virus (SfNPV). 2. Cannibalism was observed commonly even when food was not limiting, but occurred more frequently at low food quantities and/or high rearing densities. The sex of the larvae had no effect on the incidence of cannibalistic behaviour, however the probability of cannibalism occurring was affected by larval stage. The frequency of cannibalism was significantly higher among fifth- and sixth-instar larvae than among earlier instars, and larvae were more likely to consume younger conspecifics than larvae of the same stage. 3. Fifth-instar larvae offered fourth-instar victims fed equally on healthy larvae, virus-infected larvae (2 days post-infection), uninfected corpses, and virus-killed corpses (6 days post-infection). Horizontal transmission of SfNPV was only recorded in larvae offered virus-killed corpses, however, and total mortality in this treatment was only 32%. 4. In a similar experiment, fourth-instar larvae avoided cannibalising virus-killed corpses. Horizontal transmission of SfNPV was recorded in fourth-instar larvae that consumed 2-day post-infected larvae. The low incidence of cannibalism observed in fourth-instar larvae, however, suggests that this is unlikely to provide an important route for the transmission of SfNPV.
Type: Journal Article
URI: http://hdl.handle.net/1893/7251
DOI Link: http://dx.doi.org/10.1046/j.1365-2311.1999.00224.x
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: University of Southampton
El Colegio de la Frontera Sur (ECOSUR)
University of Navarra
University of Navarra
Escuela Agrı́cola Panamericana, Honduras
Biological and Environmental Sciences

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