Imidacloprid Resistance Challenges in Brazilian Strains of <i>Drosophila suzukii</i> (Diptera: Drosophilidae)
<i>Drosophila suzukii</i> (Matsumura) is a relevant pest affecting berries and stone fruits globally, including in the Neotropical region, where its invasion was reported about a decade ago. Despite chemical control being the main management method for <i>D. suzukii</i>, data...
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MDPI AG
2025-05-01
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| author | Felipe Andreazza Flávio Roberto Mello Garcia Pedro Bento da Silva Lucas Bretas Barbosa Joel Marques de Oliveira Gabriel Netto Araújo Eugenio E. Oliveira |
| author_facet | Felipe Andreazza Flávio Roberto Mello Garcia Pedro Bento da Silva Lucas Bretas Barbosa Joel Marques de Oliveira Gabriel Netto Araújo Eugenio E. Oliveira |
| author_sort | Felipe Andreazza |
| collection | DOAJ |
| description | <i>Drosophila suzukii</i> (Matsumura) is a relevant pest affecting berries and stone fruits globally, including in the Neotropical region, where its invasion was reported about a decade ago. Despite chemical control being the main management method for <i>D. suzukii</i>, data on insecticide susceptibility in Neotropical <i>D. suzukii</i> populations are scarce. Here, we assessed the susceptibility of three field-collected Brazilian <i>D. suzukii</i> populations to four insecticides (i.e., deltamethrin, permethrin, spinetoram, imidacloprid) and contrasted this with a standard insecticide-susceptible population. Using the discriminating concentration (LC<sub>90</sub>) from the standard susceptible population, we identified resistant populations. Synergist exposure (piperonyl butoxide, triphenyl phosphate, diethyl maleate) indicated the role of detoxification enzymes in resistance. Our results showed that deltamethrin was the most toxic, followed by spinetoram, permethrin, and imidacloprid. While all field populations were similarly susceptible to pyrethroids and spinosyns, one population from Minas Gerais (i.e., <i>Paula Candido</i>) had significantly lower imidacloprid susceptibility, with only 53.4 ± 5.2% mortality at 10.0 g/L (the equivalent of 10-fold the estimated imidacloprid LC<sub>90</sub>). Only piperonyl butoxide increased the imidacloprid susceptibility of <i>Paula Candido</i> flies. Our findings indicate the occurrence of cytochrome P450 enzyme-based imidacloprid resistance in the state of Minas Gerais, which can challenge the management of <i>D. suzukii</i> in Brazil. |
| format | Article |
| id | doaj-art-1aebc65b83b04a9b8efd33c06b366fb9 |
| institution | OA Journals |
| issn | 2075-4450 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Insects |
| spelling | doaj-art-1aebc65b83b04a9b8efd33c06b366fb92025-08-20T01:56:16ZengMDPI AGInsects2075-44502025-05-0116549410.3390/insects16050494Imidacloprid Resistance Challenges in Brazilian Strains of <i>Drosophila suzukii</i> (Diptera: Drosophilidae)Felipe Andreazza0Flávio Roberto Mello Garcia1Pedro Bento da Silva2Lucas Bretas Barbosa3Joel Marques de Oliveira4Gabriel Netto Araújo5Eugenio E. Oliveira6Departamento de Entomologia, Universidade Federal de Viçosa (UFV), Viçosa 36570-900, MG, BrazilDepartment of Ecology, Zoology and Genetics, Biology Institute, Federal University of Pelotas, Pelotas 96010-900, RS, BrazilDepartamento de Entomologia, Universidade Federal de Viçosa (UFV), Viçosa 36570-900, MG, BrazilDepartamento de Entomologia, Universidade Federal de Viçosa (UFV), Viçosa 36570-900, MG, BrazilDepartamento de Entomologia, Universidade Federal de Viçosa (UFV), Viçosa 36570-900, MG, BrazilDepartamento de Entomologia, Universidade Federal de Viçosa (UFV), Viçosa 36570-900, MG, BrazilDepartamento de Entomologia, Universidade Federal de Viçosa (UFV), Viçosa 36570-900, MG, Brazil<i>Drosophila suzukii</i> (Matsumura) is a relevant pest affecting berries and stone fruits globally, including in the Neotropical region, where its invasion was reported about a decade ago. Despite chemical control being the main management method for <i>D. suzukii</i>, data on insecticide susceptibility in Neotropical <i>D. suzukii</i> populations are scarce. Here, we assessed the susceptibility of three field-collected Brazilian <i>D. suzukii</i> populations to four insecticides (i.e., deltamethrin, permethrin, spinetoram, imidacloprid) and contrasted this with a standard insecticide-susceptible population. Using the discriminating concentration (LC<sub>90</sub>) from the standard susceptible population, we identified resistant populations. Synergist exposure (piperonyl butoxide, triphenyl phosphate, diethyl maleate) indicated the role of detoxification enzymes in resistance. Our results showed that deltamethrin was the most toxic, followed by spinetoram, permethrin, and imidacloprid. While all field populations were similarly susceptible to pyrethroids and spinosyns, one population from Minas Gerais (i.e., <i>Paula Candido</i>) had significantly lower imidacloprid susceptibility, with only 53.4 ± 5.2% mortality at 10.0 g/L (the equivalent of 10-fold the estimated imidacloprid LC<sub>90</sub>). Only piperonyl butoxide increased the imidacloprid susceptibility of <i>Paula Candido</i> flies. Our findings indicate the occurrence of cytochrome P450 enzyme-based imidacloprid resistance in the state of Minas Gerais, which can challenge the management of <i>D. suzukii</i> in Brazil.https://www.mdpi.com/2075-4450/16/5/494spotted wing <i>Drosophila</i>insecticide toxicityneonicotinoid resistancecytochrome P450resistance management |
| spellingShingle | Felipe Andreazza Flávio Roberto Mello Garcia Pedro Bento da Silva Lucas Bretas Barbosa Joel Marques de Oliveira Gabriel Netto Araújo Eugenio E. Oliveira Imidacloprid Resistance Challenges in Brazilian Strains of <i>Drosophila suzukii</i> (Diptera: Drosophilidae) Insects spotted wing <i>Drosophila</i> insecticide toxicity neonicotinoid resistance cytochrome P450 resistance management |
| title | Imidacloprid Resistance Challenges in Brazilian Strains of <i>Drosophila suzukii</i> (Diptera: Drosophilidae) |
| title_full | Imidacloprid Resistance Challenges in Brazilian Strains of <i>Drosophila suzukii</i> (Diptera: Drosophilidae) |
| title_fullStr | Imidacloprid Resistance Challenges in Brazilian Strains of <i>Drosophila suzukii</i> (Diptera: Drosophilidae) |
| title_full_unstemmed | Imidacloprid Resistance Challenges in Brazilian Strains of <i>Drosophila suzukii</i> (Diptera: Drosophilidae) |
| title_short | Imidacloprid Resistance Challenges in Brazilian Strains of <i>Drosophila suzukii</i> (Diptera: Drosophilidae) |
| title_sort | imidacloprid resistance challenges in brazilian strains of i drosophila suzukii i diptera drosophilidae |
| topic | spotted wing <i>Drosophila</i> insecticide toxicity neonicotinoid resistance cytochrome P450 resistance management |
| url | https://www.mdpi.com/2075-4450/16/5/494 |
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