Article (Scientific journals)
Ovicidal and Larvicidal Effects of Selected Plant-Based Biopesticides on Tuta absoluta (Lepidoptera: Gelechiidae)
Sawadogo, Wendnéyidé Mathieu; Ahissou, Besmer Régis; Somda, Irenee et al.
2022In Journal of Entomological Science, 57 (4), p. 614 - 624
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Keywords :
Azadirachta indica; bioinsecticide; control failure likelihood; Khaya senegalensis; Ecology, Evolution, Behavior and Systematics; Agronomy and Crop Science; Insect Science
Abstract :
[en] The tomato leafminer, Tuta absoluta Meyrick (Lepidoptera: Gelechiidae), is a worldwide invasive pest of tomatoes (Solanum lycopersicum L.) that reached West Africa in 2010. Synthetic insecticides remain the most widely used method of control, but several biological alternatives are being developed. In this work, we evaluated nine biopesticides available on the West African market for their ability to control T. absoluta. Using standard leaf or egg dip bioassay methodology, we compared both the ovicidal and the larvicidal activity of these biopesticides at various concentrations of active ingredients. We found that, for each biopesticide tested, the larval lethal concentrations (LC) (8.2-41.14 ml/L) to be lower than those necessary to stop egg hatching (26.7-409.7 ml/L). Two products (Bangr-Kieta [BK]; Bangr-Pougo [BP], formulated in powder), both based on Azadirachta indica A. Jussieu fruit and leaf extracts and Khaya senegalensis (Desrousseaux) A. Jussieu bark extract, showed high efficacy in reducing egg hatchability at their recommended doses, with a calculated control failure likelihood (CFL) reaching 0%. These two products, together with a third one (BP) based on Mitracarpus scaber Zuccarini and K. senegalensis extracts, also showed the strongest larvicidal effects (CFL = 0%). All other tested biological insecticides showed significant efficiency but were found to be less effective at their recommended doses. Because the leafminer has developed resistance to most of the synthetic insecticide available on the market, we recommend that West African tomato producers are encouraged to use the most efficient biological products available.
Disciplines :
Entomology & pest control
Author, co-author :
Sawadogo, Wendnéyidé Mathieu  ;  Université de Liège - ULiège > TERRA Research Centre
Ahissou, Besmer Régis  ;  Université de Liège - ULiège > TERRA Research Centre
Somda, Irenee;  Gembloux Agro-Bio Tech, TERRA, University of Liege, Gembloux, Belgium
Nacro, Souleymane;  Laboratoire Central Dentomologie Agricole, CREAF de Kamboinse, Ouagadougou, Burkina Faso
Legreve, Anne;  Phytopathology, Earth and Life Institute, Faculte des Bioinge Nieurs, Catholic University of Louvain, Croix du Sud, Louvain-la-Neuve, Belgium
Verheggen, François  ;  Université de Liège - ULiège > TERRA Research Centre > Gestion durable des bio-agresseurs
Language :
English
Title :
Ovicidal and Larvicidal Effects of Selected Plant-Based Biopesticides on Tuta absoluta (Lepidoptera: Gelechiidae)
Publication date :
12 October 2022
Journal title :
Journal of Entomological Science
ISSN :
0749-8004
Publisher :
Georgia Entomological Society Inc.
Volume :
57
Issue :
4
Pages :
614 - 624
Peer reviewed :
Peer reviewed
Available on ORBi :
since 11 June 2023

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