Age-related cannibalism and horizontal transmission of a nuclear polyhedrosis virus in larval spodoptera frugiderpa
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 conspeci®cs 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 signi®cantly higher among ®fth- and sixth-instar larvae than among earlier instars, and larvae were more likely to consume younger conspeci®cs than larvae of the same stage.
| Main Authors: | , , , , , |
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| Format: | Texto biblioteca |
| Language: | eng |
| Subjects: | Spodoptera frugiperda, Canibalismo, Virus poliedrosis nuclear, Población de insectos, Artfrosur, |
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| Summary: | 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 conspeci®cs 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 signi®cantly higher among ®fth- and sixth-instar larvae than among earlier instars, and larvae were more likely to consume younger conspeci®cs than larvae of the same stage. |
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