Does cannibalism in Spodoptera frugiperda (Lepidoptera: Noctuidae) reduce the risk of predation?
By Jason W. Chapman, T. Williams, Ana-Mabel Martínez, J. Cisneros, P. Caballero, R. Cave, Dave Goulson. Behavioral Ecology and Sociobiology, 2000
146 citations recorded by the source corpus.
Abstract The incidence of cannibalism of larval Spodoptera frugiperda (Lepidoptera: Noctuidae) on maize under field conditions was investigated using field cages. Cannibalism was found to account for approximately 40% mortality when maize plants were infested with two or four fourth-instar larvae over a 3-day period. Field trials examined the effect of larval density on the prevalence of natural enemies of S. frugiperda. The abundance of predators (earwigs, staphylinids, other predatory beetles, and Chrysoperla spp.) was significantly greater on maize plants with higher levels of larval feeding damage, while the relationship between predator abundance and number of S. frugiperda larvae per plant was less clear. As larval damage is probably a more reliable indicator of previous larval density than numbers collected at an evaluation, this indicates that predation risk will be greater for larvae living in large groups. Parasitism accounted for 7.1% mortality of larvae in sorghum, and involved six species of Hymenoptera and Tachinidae. There was no effect of larval density or within-plant distribution on the probability of larval attack by parasitoids. The selective benefits of cannibalism, in relation to the risk of predation and parasitism, are discussed.
Subfields: Insect Science, Molecular Biology, Plant Science
View Paper: https://www.semanticscholar.org/paper/551f98b55885776206a1487a9de3e483a51090aa
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Citations in the corpus
- Egg Laying Preference, Larval Dispersion, and Cannibalism in Helicoverpa armigera (Lepidoptera: Noctuidae) (2003, background): “Indirect beneÞts include removal of potential competitors (Fox 1975, Polis 1981) and reduction of the local population density, which may decrease the risk of predation and/or parasitism (Chapman et al. 1999a, 2000).”
- A climate-adapted push-pull system effectively controls fall armyworm, Spodoptera frugiperda (J E Smith), in maize in East Africa (2018, background): “…with high silica content (Pogue, 2002); the older larvae are cannibalistic and have the ability to dominate inter- and intraspecific competitors (Chapman et al., 2000); the continent provides favourable climatic conditions for a constant reproduction of the pest, which is expected to result in…”
- Toxic effects of spinosad on predatory insects (2002, background): “Moreover, densities of D. taeniatum may be positively correlated with the presence of S. frugiperda feeding damage (Chapman et al., 2000), suggesting that this predator is attracted to plants infested by fall armyworm larvae.”
- Status and control measures of fall armyworm (Spodoptera frugiperda) infestations in maize fields in Ethiopia: A review (2019, background): “Cannibalism was found to account for approximately 40% mortality when maize plants were infested with two or four fourth-instar larvae over a three-day period (Chapman et al., 2000).”
- First Report of Outbreaks of the Fall Armyworm Spodoptera frugiperda (J E Smith) (Lepidoptera, Noctuidae), a New Alien Invasive Pest in West and Central Africa (2016, background): “c) Older larvae (Fig 3) become cannibalistic and have the ability to dominate interspecific competitors and reduce intraspecific rivals [9].”