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da Cruz Araujo SH, Mantilla-Afanador JG, Svacina T, Nascimento TF, da Silva Lima A, Camara MBP, Viteri Jumbo LO, dos Santos GR, da Rocha CQ, de Oliveira EE. Contributions of γ-Aminobutyric Acid (GABA) Receptors for the Activities of Pectis brevipedunculata Essential Oil against Drosophila suzukii and Pollinator Bees. PLANTS (BASEL, SWITZERLAND) 2024; 13:1392. [PMID: 38794461 PMCID: PMC11124835 DOI: 10.3390/plants13101392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 05/11/2024] [Accepted: 05/15/2024] [Indexed: 05/26/2024]
Abstract
The γ-aminobutyric acid (GABA) receptors play pivotal roles in the transmission of neuronal information in the nervous system of insects, which has led these proteins to be targeted by synthetic and natural products. Here, we assessed the insecticidal potential of the essential oil of Pectis brevipedunculata (Gardner) Sch. Bip., a neotropical Asteraceae plant used in traditional medicine, for controlling Drosophila suzukii (Matsumura) adults by feeding exposure. By using in silico approaches, we disentangle the contribution of GABA receptors and other potential neuronal targets (e.g., acetylcholinesterase, glutathione-S-transferases) in insects that may explain the essential oil differential activities against D. suzukii and two essential pollinator bees (Apis mellifera Linnaeus and Partamona helleri Friese). Neral (26.7%) and geranial (33.9%) were the main essential oil components which killed D. suzukii with an estimated median lethal concentration (LC50) of 2.25 µL/mL. Both pollinator forager bee species, which would likely contact this compound in the field, were more tolerant to the essential oil and did not have their diet consumptions affected by the essential oil. Based on the molecular predictions for the three potential targets and the essential oil main components, a higher affinity of interaction with the GABA receptors of D. suzukii (geranial -6.2 kcal/mol; neral -5.8 kcal/mol) in relation to A. mellifera (geranial -5.2 kcal/mol; neral -4.9 kcal/mol) would contribute to explaining the difference in toxicities observed in the bioassays. Collectively, our findings indicated the involvement of GABA receptors in the potential of P. brevipedunculata essential oil as an alternative tool for controlling D. suzukii.
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Affiliation(s)
| | - Javier Guillermo Mantilla-Afanador
- Grupo de Pesquisa em Microbiologia e Biotecnologia Agroindustrial, Universidad Católica de Manizales, Rua 23 N. 60-63, Manizales 170001, Colombia;
| | - Thiago Svacina
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil; (S.H.d.C.A.)
| | - Tarciza Fernandes Nascimento
- Programa de Pós-Graduação em Biotecnologia, Universidade do Federal do Tocantins, Gurupi 77402-970, TO, Brazil (L.O.V.J.); (G.R.d.S.)
| | - Aldilene da Silva Lima
- Departamento de Química, Universidade Federal do Maranhão, São Luís 65080-805, MA, Brazil; (A.d.S.L.); (C.Q.d.R.)
| | - Marcos Bispo Pinheiro Camara
- Departamento de Química, Universidade Federal do Maranhão, São Luís 65080-805, MA, Brazil; (A.d.S.L.); (C.Q.d.R.)
| | - Luis Oswaldo Viteri Jumbo
- Programa de Pós-Graduação em Biotecnologia, Universidade do Federal do Tocantins, Gurupi 77402-970, TO, Brazil (L.O.V.J.); (G.R.d.S.)
- Programa de Pós-Graduação em Ciências Florestais e Ambientais, Universidade Federal do Tocantins, Gurupi 77402-970, TO, Brazil
- Programa de Pós-Graduação em Biologia Animal, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
| | - Gil Rodrigues dos Santos
- Programa de Pós-Graduação em Biotecnologia, Universidade do Federal do Tocantins, Gurupi 77402-970, TO, Brazil (L.O.V.J.); (G.R.d.S.)
- Programa de Pós-Graduação em Ciências Florestais e Ambientais, Universidade Federal do Tocantins, Gurupi 77402-970, TO, Brazil
| | - Cláudia Quintino da Rocha
- Departamento de Química, Universidade Federal do Maranhão, São Luís 65080-805, MA, Brazil; (A.d.S.L.); (C.Q.d.R.)
| | - Eugênio Eduardo de Oliveira
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil; (S.H.d.C.A.)
- Programa de Pós-Graduação em Biotecnologia, Universidade do Federal do Tocantins, Gurupi 77402-970, TO, Brazil (L.O.V.J.); (G.R.d.S.)
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de Albuquerque Melo Xavier JK, de Jesus Alves Miranda A, Dos Santos Soares Buna S, da Rocha CQ, da Silva Lima A. Neotropical Flora's Contribution to the Development of Biorational Products for Drosophila suzukii Control. NEOTROPICAL ENTOMOLOGY 2024; 53:400-414. [PMID: 38214825 DOI: 10.1007/s13744-023-01123-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 12/19/2023] [Indexed: 01/13/2024]
Abstract
Essential oils (EOs) produced by aromatic plants belonging to different families, such as Asteraceae, Lamiaceae, Lauraceae, Myrtaceae, and Piperaceae, are generally suggested as potential sources of new molecules with insecticidal activity. The EOs are constituted bioactive molecules that may have to control Drosophila suzukii (Matsumura), a serious economic invasive pest of small fruits worldwide. Currently, the control strategy against D. suzukii depends especially on treatment with synthetic insecticides. Due to impacts to human health and the environment, efforts have been made to seek efficient insecticides in chemical pest control. Thus, sixty-five oils extracted from plants were selected to find new alternative types of insecticides active against D. suzukii. The monoterpenes, such as limonene, α-pinene, 1,8-cineole, linalool, menthol, geranial, and neral, were the most representative, which stand out for their insecticidal efficiency. The OEs demonstrated to be used in the management of D. suzukii, thus being an effective strategy to control this pest, ensuring crop protection and agricultural sustainability. Therefore, the substitution by natural products or eco-friendly pesticides instead of synthetic pesticides represents a notable option to mitigate harmful effects on human health and the environment.
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Affiliation(s)
| | - Amanda de Jesus Alves Miranda
- Programa de Pós-Graduação em Química, Departamento de Química, Universidade Federal do Maranhão - UFMA, São Luís, MA, Brazil
| | - Samuel Dos Santos Soares Buna
- Programa de Pós-Graduação em Química, Departamento de Química, Universidade Federal do Maranhão - UFMA, São Luís, MA, Brazil
| | - Claudia Quintino da Rocha
- Programa de Pós-Graduação em Química, Departamento de Química, Universidade Federal do Maranhão - UFMA, São Luís, MA, Brazil
| | - Aldilene da Silva Lima
- Programa de Pós-Graduação em Agroecologia, Universidade Estadual do Maranhão - UEMA, São Luís, MA, Brazil.
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Pugsley CE, Isaac RE, Warren NJ, Stacey M, Ferguson CTJ, Cappelle K, Dominguez-Espinosa R, Cayre OJ. Effective delivery and selective insecticidal activity of double-stranded RNA via complexation with diblock copolymer varies with polymer block composition. PEST MANAGEMENT SCIENCE 2024; 80:669-677. [PMID: 37759365 DOI: 10.1002/ps.7793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 08/08/2023] [Accepted: 09/28/2023] [Indexed: 09/29/2023]
Abstract
BACKGROUND Chemical insecticides are an important tool to control damaging pest infestations. However, lack of species specificity, the rise of resistance and the demand for biological alternatives with improved ecotoxicity profiles means that chemicals with new modes of action are required. RNA interference (RNAi)-based strategies using double-stranded RNA (dsRNA) as a species-specific bio-insecticide offer an exquisite solution that addresses these issues. Many species, such as the fruit pest Drosophila suzukii, do not exhibit RNAi when dsRNA is orally administered due to degradation by gut nucleases and slow cellular uptake pathways. Thus, delivery vehicles that protect and deliver dsRNA are highly desirable. RESULTS In this work, we demonstrate the complexation of D. suzukii-specific dsRNA for degradation of vha26 mRNA with bespoke diblock copolymers. We study the ex vivo protection of dsRNA against enzymatic degradation by gut enzymes, which demonstrates the efficiency of this system. Flow cytometry then investigates the cellular uptake of Cy3-labelled dsRNA, showing a 10-fold increase in the mean fluorescence intensity of cells treated with polyplexes. The polymer/dsRNA polyplexes induced a significant 87% decrease in the odds of survival of D. suzukii larvae following oral feeding only when formed with a diblock copolymer containing a long neutral block length (1:2 cationic block/neutral block). However, there was no toxicity when fed to the closely related Drosophila melanogaster. CONCLUSION We provide evidence that dsRNA complexation with diblock copolymers is a promising strategy for RNAi-based species-specific pest control, but optimisation of polymer composition is essential for RNAi success. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Charlotte E Pugsley
- School of Chemical and Process Engineering, University of Leeds, Leeds, UK
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - R Elwyn Isaac
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Nicholas J Warren
- School of Chemical and Process Engineering, University of Leeds, Leeds, UK
| | - Martin Stacey
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Calum T J Ferguson
- School of Chemical and Process Engineering, University of Leeds, Leeds, UK
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Kaat Cappelle
- Syngenta Ghent Innovation Center, Gent-Zwijnaarde, Belgium
| | | | - Olivier J Cayre
- School of Chemical and Process Engineering, University of Leeds, Leeds, UK
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Gale CC, Ferguson B, Rodriguez-Saona C, Shields VDC, Zhang A. Evaluation of a Push-Pull Strategy for Spotted-Wing Drosophila Management in Highbush Blueberry. INSECTS 2024; 15:47. [PMID: 38249053 PMCID: PMC10816925 DOI: 10.3390/insects15010047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 12/31/2023] [Accepted: 01/08/2024] [Indexed: 01/23/2024]
Abstract
We evaluated a novel push-pull control strategy for protecting highbush blueberry, Vaccinium corymbosum, against spotted-wing drosophila (SWD), Drosophila suzukii. Methyl benzoate (MB) was used as the pushing agent and a previously tested SWD attractive blend of lure-scents was used as the pulling agent. MB dispensers (push) were hung in the canopy and lure-scent dispensers (pull) were hung in yellow jacket traps filled with soapy water around the blueberry bushes. Blueberries were sampled weekly, and any infestation was inspected by examining the breathing tubes of SWD eggs which protrude through the skin of infested fruit. The frequency of infestation, i.e., the proportion of berries infested with at least one egg, and the extent of infestation, i.e., the mean number of eggs in infested berries, were significantly reduced in treatments receiving MB dispensers as a pushing agent when infestation rates were very high. However, the mass trapping devices as a pulling agent did not provide comparable protection on their own and did not produce additive protection when used in combination with the MB dispensers in push-pull trials. We conclude that MB has the potential to be implemented as a spatial repellent/oviposition deterrent to reduce SWD damage in blueberry under field conditions and does not require the SWD attractant as a pulling agent to achieve crop protection.
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Affiliation(s)
- Cody C. Gale
- Invasive Insect Biocontrol and Behavior Laboratory, Beltsville Agricultural Research Center, United States Department of Agriculture-Agricultural Research Service, Beltsville, MD 20705, USA
| | - Beth Ferguson
- Phillip E. Marucci Center for Blueberry and Cranberry Research and Extension, Rutgers University, Chatsworth, NJ 08019, USA; (B.F.); (C.R.-S.)
| | - Cesar Rodriguez-Saona
- Phillip E. Marucci Center for Blueberry and Cranberry Research and Extension, Rutgers University, Chatsworth, NJ 08019, USA; (B.F.); (C.R.-S.)
| | | | - Aijun Zhang
- Invasive Insect Biocontrol and Behavior Laboratory, Beltsville Agricultural Research Center, United States Department of Agriculture-Agricultural Research Service, Beltsville, MD 20705, USA
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Regalado L, Sario S, Mendes RJ, Valle J, Harvey PJ, Teixeira C, Gomes P, Andreu D, Santos C. Towards a Sustainable Management of the Spotted-Wing Drosophila: Disclosing the Effects of Two Spider Venom Peptides on Drosophila suzukii. INSECTS 2023; 14:533. [PMID: 37367349 DOI: 10.3390/insects14060533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/03/2023] [Accepted: 06/05/2023] [Indexed: 06/28/2023]
Abstract
The spotted-wing drosophila (Drosophila suzukii) is a polyphagous pest that causes severe damage and economic losses to soft-skinned fruit production. Current control methods are dominated by inefficient cultural practices and broad-spectrum insecticides that, in addition to having toxic effects on non-target organisms, are becoming less effective due to acquired resistance. The increasing awareness of the real impact of insecticides on health and the environment has promoted the exploration of new insecticidal compounds, addressing novel molecular targets. This study explores the efficacy of two orally delivered spider venom peptides (SVPs), J-atracotoxin-Hv1c (Hv1c) and µ-theraphotoxin-Hhn2b (TRTX), to manage D. suzukii, through survival assays and the evaluation of gene expression associated with detoxification pathways. Treatment with TRTX at 111.5 µM for 48 h enhanced fly longevity compared with the control group. Gene expression analysis suggests that detoxification and stress-related mechanisms, such as expression of P450 proteins and apoptotic stimuli signaling, are triggered in D. suzukii flies in response to these treatments. Our results highlight the potential interest of SVPs to control this pest, shedding light on how to ultimately develop improved target-specific formulations.
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Affiliation(s)
- Laura Regalado
- iB2, Biology Department, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
- LAQV-REQUIMTE, Faculty of Sciences, University of Porto, 4050-453 Porto, Portugal
| | - Sara Sario
- iB2, Biology Department, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
- LAQV-REQUIMTE, Faculty of Sciences, University of Porto, 4050-453 Porto, Portugal
| | - Rafael J Mendes
- iB2, Biology Department, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
- LAQV-REQUIMTE, Faculty of Sciences, University of Porto, 4050-453 Porto, Portugal
| | - Javier Valle
- Proteomics and Protein Chemistry Unit, Department of Medicine and Life Sciences, Pompeu Fabra University, 08002 Barcelona, Spain
| | - Peta J Harvey
- Institute for Molecular Bioscience, Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Cátia Teixeira
- LAQV-REQUIMTE, Faculty of Sciences, University of Porto, 4050-453 Porto, Portugal
| | - Paula Gomes
- LAQV-REQUIMTE, Faculty of Sciences, University of Porto, 4050-453 Porto, Portugal
| | - David Andreu
- Proteomics and Protein Chemistry Unit, Department of Medicine and Life Sciences, Pompeu Fabra University, 08002 Barcelona, Spain
| | - Conceição Santos
- iB2, Biology Department, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
- LAQV-REQUIMTE, Faculty of Sciences, University of Porto, 4050-453 Porto, Portugal
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