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VOL. 9, ISSUE 8 (2024)
Natural regulation and bioecology of S. frugiperda (J.E. Smith, Lepidoptera Noctuidae) in maize crops in Senegal
Authors
Mariama Faye, Ibrahima BA, Awa Ndiaye, Ibrahima Diallo, Cheikh Thiaw
Abstract
Spodoptera. frugiperda
is a major invasive insect pest native to tropical and subtropical
regions of the Americas. It was first reported in the African continent in
2016, specifically in West Africa: Nigeria, Sao Tomé, Benin and Togo In early
2017, the species invaded sub-Saharan African countries, including Senegal. The
study aimed to identify the natural enemies of S. frugiperda in three
maize-growing areas in Senegal. A survey was carried out to explore the natural
enemies of the fall armyworm and assess the level of parasitism in three
maize-growing areas in Senegal. Nine maize fields of smallholders previously
surveyed were selected in three regions including Kaolack, Kaffrine and
Tambacounda. A total of 1258 larvae were collected, of which 523 were attacked
by parasitoids and entomopathogens, representing an average incidence of
41.57%. Two orders of parasitoid insects were extracted from armyworm larvae
and pupae, divided into eight families and one unidentified family. 159
individuals emerged in the laboratory, including 6 species of Ichneumonidae, 18
of Braconidae, 2 Evanidae, 3 Scoilidae, 124 Tachinidae, 4 Syrphidae, 1
Sphecidae and 1 of unidentified family. Parasitism caused by entomopathogenic
nematodes was highest in the Kaolack region, followed by Kaffrine and
Tambacounda. In contrast to parasitoids, the highest levels of parasitism were
noted respectively in the Tambacounda, Kaffrine and Kaolack regions. Although
the armyworm spread rapidly in the production sites, the results of the study
showed a reasonable level of biological control, especially by Diptera.
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Pages:254-263
How to cite this article:
Mariama Faye, Ibrahima BA, Awa Ndiaye, Ibrahima Diallo, Cheikh Thiaw "Natural regulation and bioecology of <i>S. frugiperda </i>(J.E. Smith, Lepidoptera Noctuidae) in maize crops in Senegal". International Journal of Entomology Research, Vol 9, Issue 8, 2024, Pages 254-263
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