Population dynamics and insecticide resistance in Tuta absoluta (Lepidoptera: Gelechiidae), an invasive pest on tomato in Kenya
Tuta absoluta feeds on solanaceous plants with preference on tomato. Management of the pest is mostly with chemical insecticides. This study identified insecticide resistant populations and predicted resistance to insecticides. Insecticide resistance development was modelled using system thinking, a...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-11-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844023086735 |
| _version_ | 1797429872410230784 |
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| author | Maureen Adhiambo Ong'onge Inusa Jacob Ajene Steven Runo Bonoukpoé Mawuko Sokame Fathiya Mbarak Khamis |
| author_facet | Maureen Adhiambo Ong'onge Inusa Jacob Ajene Steven Runo Bonoukpoé Mawuko Sokame Fathiya Mbarak Khamis |
| author_sort | Maureen Adhiambo Ong'onge |
| collection | DOAJ |
| description | Tuta absoluta feeds on solanaceous plants with preference on tomato. Management of the pest is mostly with chemical insecticides. This study identified insecticide resistant populations and predicted resistance to insecticides. Insecticide resistance development was modelled using system thinking, and system dynamics approaches. The model showed the pest resistance development is alarming with an exponential increase of the resistance strength mostly in recent years. Furthermore, we used seven insecticide-resistance gene markers to resolve the population structure and genetic differentiation of insecticide-resistant populations in Kenya. The genes for resistance (knockdown resistance (kdr) mutations, acetylcholinesterase (AChE) and voltage gated sodium channel (para)) were detected in all populations. Population structure analyses separated T. absoluta populations into three genetic clusters with resistant genes that are interconnected. A better insight on the population dynamics and the genetic structure T. absoluta resistant genes in Kenya will help estimate resistance strength and determine the most effective pest control strategies. |
| first_indexed | 2024-03-09T09:20:04Z |
| format | Article |
| id | doaj.art-c173a435c75545ee88eb378e496640a2 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-09T09:20:04Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-c173a435c75545ee88eb378e496640a22023-12-02T07:02:26ZengElsevierHeliyon2405-84402023-11-01911e21465Population dynamics and insecticide resistance in Tuta absoluta (Lepidoptera: Gelechiidae), an invasive pest on tomato in KenyaMaureen Adhiambo Ong'onge0Inusa Jacob Ajene1Steven Runo2Bonoukpoé Mawuko Sokame3Fathiya Mbarak Khamis4International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya; Department of Biochemistry, Microbiology and Biotechnology, Kenyatta University, Nairobi, KenyaInternational Centre of Insect Physiology and Ecology (icipe), Nairobi, KenyaDepartment of Biochemistry, Microbiology and Biotechnology, Kenyatta University, Nairobi, KenyaInternational Centre of Insect Physiology and Ecology (icipe), Nairobi, KenyaInternational Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya; Corresponding author.Tuta absoluta feeds on solanaceous plants with preference on tomato. Management of the pest is mostly with chemical insecticides. This study identified insecticide resistant populations and predicted resistance to insecticides. Insecticide resistance development was modelled using system thinking, and system dynamics approaches. The model showed the pest resistance development is alarming with an exponential increase of the resistance strength mostly in recent years. Furthermore, we used seven insecticide-resistance gene markers to resolve the population structure and genetic differentiation of insecticide-resistant populations in Kenya. The genes for resistance (knockdown resistance (kdr) mutations, acetylcholinesterase (AChE) and voltage gated sodium channel (para)) were detected in all populations. Population structure analyses separated T. absoluta populations into three genetic clusters with resistant genes that are interconnected. A better insight on the population dynamics and the genetic structure T. absoluta resistant genes in Kenya will help estimate resistance strength and determine the most effective pest control strategies.http://www.sciencedirect.com/science/article/pii/S2405844023086735Tuta absolutaKnockdown resistanceAcetylcholinesteraseSystem thinkingSystem dynamics |
| spellingShingle | Maureen Adhiambo Ong'onge Inusa Jacob Ajene Steven Runo Bonoukpoé Mawuko Sokame Fathiya Mbarak Khamis Population dynamics and insecticide resistance in Tuta absoluta (Lepidoptera: Gelechiidae), an invasive pest on tomato in Kenya Heliyon Tuta absoluta Knockdown resistance Acetylcholinesterase System thinking System dynamics |
| title | Population dynamics and insecticide resistance in Tuta absoluta (Lepidoptera: Gelechiidae), an invasive pest on tomato in Kenya |
| title_full | Population dynamics and insecticide resistance in Tuta absoluta (Lepidoptera: Gelechiidae), an invasive pest on tomato in Kenya |
| title_fullStr | Population dynamics and insecticide resistance in Tuta absoluta (Lepidoptera: Gelechiidae), an invasive pest on tomato in Kenya |
| title_full_unstemmed | Population dynamics and insecticide resistance in Tuta absoluta (Lepidoptera: Gelechiidae), an invasive pest on tomato in Kenya |
| title_short | Population dynamics and insecticide resistance in Tuta absoluta (Lepidoptera: Gelechiidae), an invasive pest on tomato in Kenya |
| title_sort | population dynamics and insecticide resistance in tuta absoluta lepidoptera gelechiidae an invasive pest on tomato in kenya |
| topic | Tuta absoluta Knockdown resistance Acetylcholinesterase System thinking System dynamics |
| url | http://www.sciencedirect.com/science/article/pii/S2405844023086735 |
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