1
|
Dawdani S, O'Neill M, Castillo C, Sámano JEM, Higo H, Ibrahim A, Pernal SF, Plettner E. Effects of dialkoxybenzenes against Varroa destructor and identification of 1-allyloxy-4-propoxybenzene as a promising acaricide candidate. Sci Rep 2023; 13:11195. [PMID: 37433810 DOI: 10.1038/s41598-023-38187-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 07/04/2023] [Indexed: 07/13/2023] Open
Abstract
The honey bee is responsible for pollination of a large proportion of crop plants, but the health of honey bee populations has been challenged by the parasitic mite Varroa destructor. Mite infestation is the main cause of colony losses during the winter months, which causes significant economic challenges in apiculture. Treatments have been developed to control the spread of varroa. However, many of these treatments are no longer effective due to acaricide resistance. In a search of varroa-active compounds, we tested the effect of dialkoxybenzenes on the mite. A structure-activity relationship revealed that 1-allyloxy-4-propoxybenzene is most active of a series of dialkoxybenzenes tested. We found that three compounds (1-allyloxy-4-propoxybenzene, 1,4-diallyloxybenzene and 1,4-dipropoxybenzene) cause paralysis and death of adult varroa mites, whereas the previously discovered compound, 1,3-diethoxybenzene, which alters host choice of adult mites in certain conditions, did not cause paralysis. Since paralysis can be caused by inhibition of acetylcholinesterase (AChE), a ubiquitous enzyme in the nervous system of animals, we tested dialkoxybenzenes on human, honey bee and varroa AChE. These tests revealed that 1-allyloxy-4-propoxybenzene had no effects on AChE, which leads us to conclude that 1-allyloxy-4-propoxybenzene does not exert its paralytic effect on mites through AChE. In addition to paralysis, the most active compounds affected the ability of the mites to find and remain at the abdomen of host bees provided during assays. A test of 1-allyloxy-4-propoxybenzene in the field, during the autumn of 2019 in two locations, showed that this compound has promise in the treatment of varroa infestations.
Collapse
Affiliation(s)
- Soniya Dawdani
- Department of Chemistry, Simon Fraser University, 8888 Univ. Dr., Burnaby, BC, V5A 1S6, Canada
| | - Marissa O'Neill
- Department of Chemistry, Simon Fraser University, 8888 Univ. Dr., Burnaby, BC, V5A 1S6, Canada
| | - Carlos Castillo
- Agriculture and Agri-Food Canada, Beaverlodge Research Farm, P.O. Box 29, Beaverlodge, AB, T0H 0C0, Canada
| | - Jorge E Macias Sámano
- Department of Chemistry, Simon Fraser University, 8888 Univ. Dr., Burnaby, BC, V5A 1S6, Canada
| | - Heather Higo
- Department of Chemistry, Simon Fraser University, 8888 Univ. Dr., Burnaby, BC, V5A 1S6, Canada
| | - Abdullah Ibrahim
- Agriculture and Agri-Food Canada, Beaverlodge Research Farm, P.O. Box 29, Beaverlodge, AB, T0H 0C0, Canada
| | - Stephen F Pernal
- Agriculture and Agri-Food Canada, Beaverlodge Research Farm, P.O. Box 29, Beaverlodge, AB, T0H 0C0, Canada
| | - Erika Plettner
- Department of Chemistry, Simon Fraser University, 8888 Univ. Dr., Burnaby, BC, V5A 1S6, Canada.
| |
Collapse
|
2
|
Global honeybee health decline factors and potential conservation techniques. Food Secur 2023. [DOI: 10.1007/s12571-023-01346-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
3
|
Tamagno WA, Alves C, Pompermaier A, Vanin AP, Barcellos LJG. Household prallethrin-based insecticide toxicity on different C. elegans life stage: A possible sign of Huntington Disease. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 314:120301. [PMID: 36181934 DOI: 10.1016/j.envpol.2022.120301] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 09/05/2022] [Accepted: 09/25/2022] [Indexed: 06/16/2023]
Abstract
Household insecticide is largely used for insect and ectoparasite control, in city centers as well as in the countryside. The pyrethroids are the most used class of insecticide, these compounds in low doses have low toxicity for mammalians, in comparison to other compounds, with insecticide effects. The contact of these compounds in sublethal doses begins in early life and many cases, in intrauterine life. Considerable diseases still with undefined etiology, such as neurodegenerative conditions, and Huntington's Disease (HD) is one of them. HD is related to overexpression of Polyglutamine (PolyQ40), its aggregation, and non-solubilization, which leads to neural, behavioral, and cognitive damage. In our study, we evaluate the effect of two sublethal doses of a prallethrin-based insecticide (P-BI), in three different Caenorhabditis elegans life stages transgenerational, neonatal, and lifespan. We evaluated the Body bends and pharyngeal pumping rate, and social feeding as behavioral biomarkers. As well as acetylcholinesterase activity (AChE), PolyQ40 aggregation, antioxidant enzymes, and heat shock protein (HSP) expression. We observe that the toxic effect of P-BI is more pronounced on transgenerational and lifespan exposure. Both sublethal doses of P-BI decreased the AChE activity and retard the HSP expression as well as increased the PolyQ40 aggregates indicating a clear biomarker for possible effect in the progression of the HD, by the environmental contamination.
Collapse
Affiliation(s)
- Wagner Antonio Tamagno
- - Graduate Program in Pharmacology, Universidade Federal de Santa Maria, Av. Roraima, 1000, Cidade Universitária, Camobi, Santa Maria, RS, 97105-900, Brazil; - Biochemistry and Molecular Biology Laboratory Rosilene Rodrigues Kaizer, Federal Institute of Education, Science and Technology of Rio Grande Do Sul, Campus Sertão, ERS 135, Km 25, Eng. Englert, RS, 99170-000, Brazil.
| | - Carla Alves
- - Biochemistry and Molecular Biology Laboratory Rosilene Rodrigues Kaizer, Federal Institute of Education, Science and Technology of Rio Grande Do Sul, Campus Sertão, ERS 135, Km 25, Eng. Englert, RS, 99170-000, Brazil; - Graduate Program in Bioexperimentation Universidade de Passo Fundo, BR 285, São José, Passo Fundo, RS, 99052-900, Brazil.
| | - Aline Pompermaier
- - Graduate Program in Bioexperimentation Universidade de Passo Fundo, BR 285, São José, Passo Fundo, RS, 99052-900, Brazil.
| | - Ana Paula Vanin
- - Graduate Program in Science and Environmental Technology, Universidade Federal da Fronteira Sul, ERS 135, Erechim, RS, 99700-000, Brazil.
| | - Leonardo José Gil Barcellos
- - Graduate Program in Pharmacology, Universidade Federal de Santa Maria, Av. Roraima, 1000, Cidade Universitária, Camobi, Santa Maria, RS, 97105-900, Brazil; - Graduate Program in Bioexperimentation Universidade de Passo Fundo, BR 285, São José, Passo Fundo, RS, 99052-900, Brazil.
| |
Collapse
|
4
|
Fellows CJ, Anderson TD, Swale DR. Acute toxicity of atrazine, alachlor, and chlorpyrifos mixtures to honey bees. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2022; 188:105271. [PMID: 36464376 DOI: 10.1016/j.pestbp.2022.105271] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 10/19/2022] [Accepted: 10/19/2022] [Indexed: 06/17/2023]
Abstract
The acute toxicity of chlorpyrifos and chlorpyrifos-oxon (organophosphorothioate insecticides) was examined alone and in combination with atrazine (triazine herbicide) and alachlor (chloroacetanilide herbicide) to honey bees (Apis mellifera). Atrazine and alachlor were observed to not be acutely toxic to bees at doses up to 10 and 4 μg per bee, respectively. However, atrazine significantly increased chlorpyrifos toxicity by 3-fold while reducing chlorpyrifos-oxon toxicity by 1.8-fold. These changes in toxicity are correlated with significant 1.3- and 1.2-fold inhibition of acetylcholinesterase (AChE) activity in bees exposed to chlorpyrifos and chlorpyrifos-oxon, respectively. Atrazine significantly increased cytochrome P450, general esterase, and glutathione S-transferase (GST) activities by 1.5-, 1.2-, and 1.2- fold respectively, in bees compared to untreated individuals. Alachlor increased chlorpyrifos toxicity by 2.5-fold but did not affect the toxicity of chlorpyrifos-oxon. Exposure to alachlor and chlorpyrifos did not affect AChE compared to chlorpyrifos alone. However, exposure to chlorpyrifos-oxon and alachlor significantly increased acetylcholinesterase (AChE) activity by 1.4-fold. GST activity, but not P450 or general esterases, was significantly increased in bees exposed to alachlor. These data provide evidence that triazine and chloroacetanilide herbicide exposure alters detoxification enzyme activity and, in turn, alters the sensitivity of bees to organophosphorothioate insecticides. Importantly, these data can be used to guide future studies aiming to test safety profiles for pollinators and expand regulatory framework required for pesticide registration.
Collapse
Affiliation(s)
| | - Troy D Anderson
- Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA
| | - Daniel R Swale
- Department of Entomology, Louisiana State University AgCenter, Baton Rouge, LA, USA; Department of Entomology and Nematology, Emerging Pathogens Institute, University of Florida, Gainesville, FL, 32610, USA.
| |
Collapse
|
5
|
Tianle C, Liuxu Y, Delong L, Yunhan F, Yu H, Xueqing S, Haitao X, Guizhi W. Fluvalinate-Induced Changes in MicroRNA Expression Profile of Apis mellifera ligustica Brain Tissue. Front Genet 2022; 13:855987. [PMID: 35495168 PMCID: PMC9039055 DOI: 10.3389/fgene.2022.855987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Accepted: 03/17/2022] [Indexed: 01/09/2023] Open
Abstract
Fluvalinate is a widely used and relatively safe acaricide for honeybees, but it still has a negative impact on honeybee colonies. Such negative effects may be related to fluvalinate-induced brain nerve tissue damage, but the detailed molecular regulatory mechanism of this phenomenon is still poorly understood. In this study, we analyzed the miRNA expression profile changes in the brain tissue of Apis mellifera ligustica by miRNA sequencing after fluvalinate treatment. A total of 1,350 miRNAs were expressed in Apis mellifera ligustica brain tissue, of which only 180 were previously known miRNAs in honeybees. Among all known and novel miRNAs, 15 were differentially expressed between at least two of the four time periods before and after fluvalinate administration. Further analysis revealed five significantly enriched KEGG pathways of the differentially expressed miRNA (DEM) potential target genes, namely, "Hippo signaling pathway-fly," "Phototransduction-fly," "Apoptosis-fly," "Wnt signaling pathway," and "Dorso-ventral axis formation," which indicates that differentially expressed miRNA function may be related to cell apoptosis and memory impairment in the fluvalinate-treated Apis mellifera ligustica brain. Ame-miR-3477-5p, ame-miR-375-3p, and miR-281-x were identified as key miRNAs. Overall, our research provides new insights into the roles of miRNAs in brain tissue during the process of fluvalinate-induced Apis mellifera ligustica poisoning.
Collapse
Affiliation(s)
- Chao Tianle
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai’an, China,*Correspondence: Chao Tianle, ; Wang Guizhi,
| | - Yang Liuxu
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai’an, China
| | - Lou Delong
- Comprehensive Testing and Inspection Center, Shandong Provincial Animal Husbandry and Veterinary Bureau, Jinan, China
| | - Fan Yunhan
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai’an, China
| | - He Yu
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai’an, China
| | - Shan Xueqing
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai’an, China
| | - Xia Haitao
- Animal Husbandry Development Center of Linqu County, Weifang, China
| | - Wang Guizhi
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai’an, China,*Correspondence: Chao Tianle, ; Wang Guizhi,
| |
Collapse
|
6
|
Jack CJ, Kleckner K, Demares F, Rault LC, Anderson TD, Carlier PR, Bloomquist JR, Ellis JD. Testing new compounds for efficacy against Varroa destructor and safety to honey bees (Apis mellifera). PEST MANAGEMENT SCIENCE 2022; 78:159-165. [PMID: 34464499 DOI: 10.1002/ps.6617] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 08/31/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Varroa destructor is among the greatest threats to honey bee health worldwide. Acaricides used to control Varroa are becoming increasingly ineffective due to resistance issues, prompting the need for new compounds that can be used for control purposes. Ideally, such compounds would exhibit high toxicity to Varroa while maintaining relatively low toxicity to bees and beekeepers. We characterized the lethal concentrations (LC50 ) of amitraz, matrine, FlyNap®, the experimental carbamates 2-((2-ethylbutyl)thio)phenyl methylcarbamate (1) and 2-(2-ethylbutoxy)phenyl methylcarbamate (2), and dimethoate (positive control) for Varroa using a glass vial assay. The test compounds also were applied to honey bees using an acute contact toxicity assay to determine the adult bee LD50 for each compound. RESULTS Amitraz was the most toxic compound to Varroa, but carbamate 2 was nearly as active (within 2-fold) and the most selective due to its lower bee toxicity, demonstrating its promise as a Varroa control. While carbamate 1 was less toxic to honey bees than was amitraz, it was also 4.7-fold less toxic to the mites. Both matrine and FlyNap® were relatively ineffective at killing Varroa and were moderately toxic to honey bees. CONCLUSION Additional testing is required to determine if carbamate 2 can be used as an effective Varroa control. As new chemical treatments are identified, it will be necessary to determine how they can be utilized best alongside other control techniques as part of an integrated pest management program. © 2021 Society of Chemical Industry.
Collapse
Affiliation(s)
- Cameron J Jack
- Entomology and Nematology Department, University of Florida, Gainesville, FL, USA
| | - Kaylin Kleckner
- Entomology and Nematology Department, University of Florida, Gainesville, FL, USA
| | - Fabien Demares
- Entomology and Nematology Department, Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA
| | - Leslie C Rault
- 109D Entomology Hall, Department of Entomology, University of Nebraska, Lincoln, NE, USA
| | - Troy D Anderson
- 109D Entomology Hall, Department of Entomology, University of Nebraska, Lincoln, NE, USA
| | - Paul R Carlier
- Virginia Tech Center for Drug Discovery, Department of Chemistry, Virginia Tech, Blacksburg, VA, USA
| | - Jeffrey R Bloomquist
- Entomology and Nematology Department, Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA
| | - James D Ellis
- Entomology and Nematology Department, University of Florida, Gainesville, FL, USA
| |
Collapse
|
7
|
McComic SE, Rault LC, Anderson TD, Swale DR. Toxicological analysis of stilbenes against the fall armyworm, Spodoptera frugiperda. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2021; 179:104965. [PMID: 34802515 DOI: 10.1016/j.pestbp.2021.104965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 08/17/2021] [Accepted: 09/14/2021] [Indexed: 06/13/2023]
Abstract
The fall armyworm (FAW), Spodoptera frugiperda, is a global pest of multiple economically important row crops and the development of resistance to commercially available insecticidal classes has inhibited FAW control. Thus, there is a need to identify chemical scaffolds that can provide inspiration for the development of novel insecticides for FAW management. This study aimed to assess the sensitivity of central neurons and susceptibility of FAW to chloride channel modulators to establish a platform for repurposing existing insecticides or designing new chemicals capable of controlling FAW. Potency of select chloride channel modulators were initially studied against FAW central neuron firing rate and rank order of potency was determined to be fipronil > lindane > Z-stilbene > DIDS > GABA > E-stilbene. Toxicity bioassays identified fipronil and lindane as the two most toxic modulators studied with topical LD50's of 41 and 75 ng/mg of caterpillar, respectively. Interestingly, Z-stilbene was toxic at 300 ng/mg of caterpillar, but no toxicity was observed with DIDS or E-stilbene. The significant shift in potency between stilbene isomers indicates structure-activity relationships between stilbene chemistry and the binding site in FAW may exist. The data presented in this study defines the potency of select chloride channel modulators to FAW neural activity and survivorship to establish a platform for development of novel chemical agents to control FAW populations. Although stilbenes may hold promise for insecticide development, the low toxicity of the scaffolds tested in this study dampen enthusiasm for their development into FAW specific insecticides.
Collapse
Affiliation(s)
- Sarah E McComic
- Louisiana State University AgCenter, Department of Entomology, Baton Rouge, LA 70803, United States of America
| | - Leslie C Rault
- University of Nebraska, Department of Entomology, 103 Entomology Hall, Lincoln, NE 68583, United States of America
| | - Troy D Anderson
- University of Nebraska, Department of Entomology, 103 Entomology Hall, Lincoln, NE 68583, United States of America
| | - Daniel R Swale
- Louisiana State University AgCenter, Department of Entomology, Baton Rouge, LA 70803, United States of America.
| |
Collapse
|
8
|
Kasiotis KM, Zafeiraki E, Kapaxidi E, Manea-Karga E, Antonatos S, Anastasiadou P, Milonas P, Machera K. Pesticides residues and metabolites in honeybees: A Greek overview exploring Varroa and Nosema potential synergies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 769:145213. [PMID: 33736246 DOI: 10.1016/j.scitotenv.2021.145213] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 01/10/2021] [Accepted: 01/11/2021] [Indexed: 06/12/2023]
Abstract
The aim of this study was to investigate reported cases of honeybee mortality incidents and the potential association to pesticide exposure and to their metabolites. The same honeybee samples were also assessed for Varroa mites, and Nosema microsporidia provoked infections to provide an integrated picture of all observable stressors that may impact bees' survival. Thus, honeybee samples from different areas of Greece (2014-2018) were analyzed for the presence of pesticide residues and metabolites. In this context, an existing LC-ESI-QqQ-MS multiresidue method of analytes of different chemical classes such as neonicotinoids, organophosphates, triazoles, carbamates, was enriched with additional active substances, developed and validated. A complementary GC-EI-QqQ-MS method was also exploited for the same scope covering pyrethroid compounds. Both methods monitored more than 150 active substances and metabolites and presented acceptable linearity over the ranges assayed. The calculated recoveries ranged from 65 to 120% for the three concentration levels, while the precision (RSD%) values ranged between 4 and 15%. Therefore, this approach proved sufficient to act as a monitoring tool for the determination of pesticide residues in cases of suspected honeybee poisoning incidents. From the analysis of 320 samples, the presence of 70 active substances and metabolites was confirmed with concentrations varying from 1.4 ng/g to 166 μg/g. Predominant detections were the acaricide coumaphos, several neonicotinoids exemplified by clothianidin, organophosporous compounds dimethoate and chlorpyrifos, and some pyrethroids. Metabolites of imidacloprid, chlorpyrifos, coumaphos, acetamiprid, fenthion and amitraz were also identified. Concerning Nosema and Varroa they were identified in 27 and 22% of samples examined, respectively, verifying their prevalence and coexistence with pesticides and their metabolites in honeybees.
Collapse
Affiliation(s)
- Konstantinos M Kasiotis
- Benaki Phytopathological Institute, Department of Pesticides Control and Phytopharmacy, Laboratory of Pesticides' Toxicology, 8 St. Delta Street, Kifissia, 14561 Athens, Greece.
| | - Effrosyni Zafeiraki
- Benaki Phytopathological Institute, Department of Pesticides Control and Phytopharmacy, Laboratory of Pesticides' Toxicology, 8 St. Delta Street, Kifissia, 14561 Athens, Greece
| | - Eleftheria Kapaxidi
- Benaki Phytopathological Institute, Department of Entomology & Agricultural Entomology, Laboratory of Acarology & Agricultural Zoology, Greece
| | - Elektra Manea-Karga
- Benaki Phytopathological Institute, Department of Pesticides Control and Phytopharmacy, Laboratory of Pesticides' Toxicology, 8 St. Delta Street, Kifissia, 14561 Athens, Greece
| | - Spyridon Antonatos
- Benaki Phytopathological Institute, Department of Entomology & Agricultural Entomology, Laboratory of Agricultural Entomology, Greece
| | - Pelagia Anastasiadou
- Benaki Phytopathological Institute, Department of Pesticides Control and Phytopharmacy, Laboratory of Pesticides' Toxicology, 8 St. Delta Street, Kifissia, 14561 Athens, Greece
| | - Panagiotis Milonas
- Benaki Phytopathological Institute, Department of Entomology & Agricultural Entomology, Biological Control Laboratory, Greece
| | - Kyriaki Machera
- Benaki Phytopathological Institute, Department of Pesticides Control and Phytopharmacy, Laboratory of Pesticides' Toxicology, 8 St. Delta Street, Kifissia, 14561 Athens, Greece.
| |
Collapse
|
9
|
Nauen R, Van Leeuwen T. Preface to the special issue: Recent trends in insecticide mode of action and resistance. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2020; 168:104635. [PMID: 32711769 DOI: 10.1016/j.pestbp.2020.104635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 06/15/2020] [Indexed: 06/11/2023]
Affiliation(s)
- Ralf Nauen
- Bayer AG, Crop Science Division, R&D, Germany.
| | | |
Collapse
|