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Moustafa MAM, Fouad EA, Ibrahim E, Erdei AL, Kárpáti Z, Fónagy A. The Comparative Toxicity, Biochemical and Physiological Impacts of Chlorantraniliprole and Indoxacarb on Mamestra brassicae (Lepidoptera: Noctuidae). Toxics 2023; 11:212. [PMID: 36976977 PMCID: PMC10055103 DOI: 10.3390/toxics11030212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/14/2023] [Accepted: 02/21/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND The cabbage moth, Mamestra brassicae, is a polyphagous pest that attacks several crops. Here, the sublethal and lethal effects of chlorantraniliprole and indoxacarb were investigated on the developmental stages, detoxification enzymes, reproductive activity, calling behavior, peripheral physiology, and pheromone titer of M. brasssicae. Methods: To assess pesticide effects, the second instar larvae were maintained for 24 h on a semi-artificial diet containing insecticides at their LC10, LC30, and LC50 concentrations. RESULTS M. brassicae was more susceptible to chlorantraniliprole (LC50 = 0.35 mg/L) than indoxacarb (LC50 = 1.71 mg/L). A significantly increased developmental time was observed with both insecticides at all tested concentrations but decreases in pupation rate, pupal weight, and emergence were limited to the LC50 concentration. Reductions in both the total number of eggs laid per female and the egg viability were observed with both insecticides at their LC30 and LC50 concentrations. Both female calling activity and the sex pheromone (Z11-hexadecenyl acetate and hexadecenyl acetate) titer were significantly reduced by chlorantraniliprole in LC50 concentration. Antennal responses of female antennae to benzaldehyde and 3-octanone were significantly weaker than controls after exposure to the indoxocarb LC50 concentration. Significant reductions in the enzymatic activity of glutathione S-transferases, mixed-function oxidases, and carboxylesterases were observed in response to both insecticides.
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Affiliation(s)
- Moataz A. M. Moustafa
- Department of Economic Entomology and Pesticides, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
| | - Eman A. Fouad
- Department of Bioassay, Central Agricultural Pesticides Laboratory, Agricultural Research Center, Giza 12618, Egypt
| | - Emad Ibrahim
- Department of Economic Entomology and Pesticides, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
- Plant Virus and Vector Interactions, Crop Research Institute, 16106 Prague, Czech Republic
| | - Anna Laura Erdei
- Plant Protection Institute, Centre for Agricultural Research, Eötvös Lóránd Research Network (ELKH), 1022 Budapest, Hungary
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences, 23053 Uppsala, Sweden
| | - Zsolt Kárpáti
- Plant Protection Institute, Centre for Agricultural Research, Eötvös Lóránd Research Network (ELKH), 1022 Budapest, Hungary
- Animal Ecology and Tropical Biology, University of Würzburg, 97070 Würzburg, Germany
| | - Adrien Fónagy
- Plant Protection Institute, Centre for Agricultural Research, Eötvös Lóránd Research Network (ELKH), 1022 Budapest, Hungary
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Hafeez M, Ullah F, Khan MM, Wang Z, Gul H, Li X, Huang J, Siddiqui JA, Qasim M, Wang RL, Imran M, Assiri MA, Rehman M, Fahad S, Lu Y. Comparative low lethal effects of three insecticides on demographical traits and enzyme activity of the Spodoptera exigua (Hübner). Environ Sci Pollut Res Int 2022; 29:60198-60211. [PMID: 35414161 DOI: 10.1007/s11356-022-20182-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 04/06/2022] [Indexed: 06/14/2023]
Abstract
Many species of devastating insect pests have acquired a high degree of resistance to insecticides in the field during the last few decades. Spodoptera exigua, for example, is the most damaging pests of economic crops with a worldwide spread. In a present study, the comparative growth, reproduction, and detoxification enzyme activity were evaluated along with exposure to three insecticides at low lethal doses of lufenuron, indoxacarb, and spinosad as compared to the control. Results indicate that the larval developmental time was significantly extended on lufenuron (21.5 ± 29 days) followed by indoxacarb (20.28 ± 0.24 days) and spinosad (19.74 ± 0.23 days) as compared to that on the control (18.13 ± 0.13 days). Similarly, the lowest number of eggs of S. exigua females were recorded on lufenuron (328.75 ± 50.81 eggs) followed by spinosad (367 ± 36.4 eggs) and indoxacarb (411.58 ± 42.38 eggs) as compared to that on the control (560.2 ± 13.47). Interestingly, the lowest intrinsic rate of increase (r) (0.121 ± 0.009) and highest mean generation time (T) (36.2 ± 0.35 days) were observed when larvae were treated to a low lethal concentration (LC20) of lufenuron as compared to that of indoxacarb, spinosad, and control. In addition, considerably lower activity of all detoxification enzymes in larvae was recorded on lufenuron after control as compared to that on indoxacarb and spinosad. Our study serves as a reference and basis for the toxicity and low lethal evaluation of lufenuron, indoxacarb, and spinosad on life table parameters and enzymatic properties in S. exigua, which may contribute to identifying targets for effective control of S. exigua.
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Affiliation(s)
- Muhammad Hafeez
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, People's Republic of China
- State Key Laboratory of Rice Biology, Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Farman Ullah
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, 100193, China
| | - Muhammad Musa Khan
- Key Laboratory of Bio-Pesticide Innovation and Application, Guangdong Province, South China Agricultural University, Guangzhou, 510642, China
| | - Zhangqian Wang
- School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan, 430023, People's Republic of China
| | - Hina Gul
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, 100193, China
| | - Xiaowei Li
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, People's Republic of China
| | - Jun Huang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, People's Republic of China
| | - Junaid Ali Siddiqui
- Red Imported Fire Ant Research Center, Department of Entomology, South China Agricultural University, Guangzhou, 510642, China
| | - Muhammad Qasim
- Department of Agriculture and Forestry, Kohsar University Murree, Punjab, 47150, Pakistan
| | - Rui-Long Wang
- College of Natural Resources and Environment, South China Agricultural University Wushan, Guangzhou, 510642, People's Republic of China
| | - Muhammad Imran
- Department of Chemistry, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia
| | - Mohammed A Assiri
- Department of Chemistry, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia
| | - Muzammal Rehman
- School of Agriculture, Yunnan University, Kunming, 650504, Yunnan, China
| | - Shah Fahad
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, 570228, Hainan, China.
- Department of Agronomy, University of Haripur, Haripur, 22620, Khyber Pakhtunkhwa, Pakistan.
| | - Yaobin Lu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, People's Republic of China.
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Nozad-Bonab Z, Hejazi MJ, Iranipour S, Arzanlou M, Biondi A. Lethal and sublethal effects of synthetic and bio-insecticides on Trichogramma brassicae parasitizing Tuta absoluta. PLoS One 2021; 16:e0243334. [PMID: 34329292 PMCID: PMC8323930 DOI: 10.1371/journal.pone.0243334] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 07/14/2021] [Indexed: 11/18/2022] Open
Abstract
The tomato leaf miner (TLM), Tuta absoluta (Meyrick), is an invasive tomato pest found worldwide. Sustainable control strategies aimed at increasing biological control approaches and decreasing chemical inputs are required, due to the tendency to develop insecticide resistance. In this study, the lethal and sublethal effects of four chemical insecticides (abamectin, indoxacarb, chlorantraniliprole, and spinosad) and the sublethal effects of the entomopathogenic fungus Metarhizium anisopliae (Metschnikoff) on a widespread TLM egg parasitoid, Trichogramma brassicae Bezdenko, were estimated. Concentration mortality response bioassays enabled the estimation of lethal concentrations of the tested insecticides for the parasitoids, with chlorantraniliprole having the lowest LC50 and indoxacarb the highest. The LC25 and LC50 of the tested insecticides on the TLM were sprayed on eggs and then offered at three time intervals to the parasitoids. The fertility and other life table parameters of the individuals emerging from the treated eggs were estimated. All of the chemical insecticides, but not the fungus, had harmful effects on T. brassicae. The insecticide applications caused a 3.84-5.17 times reduction in the net reproductive rate (R0) compared with the control. No parameters were affected by spraying the fungus in the 0h treatment, but effects were recorded at 24 and/or 48h, except for the gross reproduction rate (GRR). The value of the intrinsic rate of increase (rm) also decreased to 0.528-0.617 after the insecticide treatments. The doubling time (DT) increased in all treatments compared to the control. Nevertheless, the generation time (T) was only very slightly affected. In addition, in the combination experiments, M. anisopliae showed a remarkable synergism with T. brassicae in controlling TLM eggs. These results indicate that low levels of lethal effects on key biological control agents should be considered in the choice of insecticides to be included in sustainable TLM control packages.
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Affiliation(s)
| | - Mir Jalil Hejazi
- Department of Plant Protection, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
| | - Shahzad Iranipour
- Department of Plant Protection, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
| | - Mehdi Arzanlou
- Department of Plant Protection, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
| | - Antonio Biondi
- Department of Agriculture, Food and Environment, University of Catania, Catania, Italy
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Piri A, Sahebzadeh N, Zibaee A, Sendi JJ, Shamakhi L, Shahriari M. Toxicity and physiological effects of ajwain (Carum copticum, Apiaceae) essential oil and its major constituents against Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae). Chemosphere 2020; 256:127103. [PMID: 32447114 DOI: 10.1016/j.chemosphere.2020.127103] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 05/14/2020] [Accepted: 05/15/2020] [Indexed: 06/11/2023]
Abstract
The effects of Ajwain essential oil and its major constituents were investigated against newly fourth instar larvae of Tuta absoluta, a major pest of tomato cropping in Iran and other parts of the world. The study included individual efficacy of each compound and determination of their synergistic or antagonistic efficacy. We also determined the activities of detoxifying enzymes in treated insects. According to the results, the Ajwain essential oil and thymol showed the highest toxicity against T. absoluta larvae (LC50 = 6.14 and 7.72 μL/mL, respectively, and LC30 = 3.05 and 3.57 μL/mL, respectively). The ɤ-terpinene and p-cymene had lesser toxicity compared to other compounds. The larvicidal potency increased by binary mixtures of active constituents, such as thymol + p-cymene and thymol + ɤ-terpinene. On the other hand, ɤ-terpinene + p-cymene mixture demonstrated antagonistic effect on the larvae. The esterases and glutathione S-transferases were significantly increased in all treatments. Finally, our results revealed a significant inhibition of AChE activity in the treated larvae by all treatments except for ɤ-terpinene + p-cymene. In vitro experiments representing AChE inhibition with IC50 values were recorded 0.370, 0.457, 0.528, 1.094 and 1.323 μL/mL for thymol + p-cymene, thymol + ɤ-terpinene, thymol, ɤ-terpinene and p-cymene, respectively. Thymol demonstrated significant potential as a controlling agent of T. absoluta larvae, both larvicidal, compatible with other compounds with strong AChE inhibition properties. These finding could pave the way for development of new botanicals based on EO constituents which should be completed with preparation of an efficient formulation and field trials.
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Affiliation(s)
- Amir Piri
- Department of Plant Protection, Faculty of Agriculture, University of Zabol, 98615-538, Zabol, Iran
| | - Najmeh Sahebzadeh
- Department of Plant Protection, Faculty of Agriculture, University of Zabol, 98615-538, Zabol, Iran
| | - Arash Zibaee
- Department of Plant Protection, Faculty of Agricultural Sciences, University of Guilan, 41635-1314, Rasht, Iran
| | - Jalal Jalali Sendi
- Department of Plant Protection, Faculty of Agricultural Sciences, University of Guilan, 41635-1314, Rasht, Iran
| | - Leila Shamakhi
- Department of Plant Protection, Faculty of Agricultural Sciences, University of Guilan, 41635-1314, Rasht, Iran
| | - Morteza Shahriari
- Department of Plant Protection, Faculty of Agricultural Sciences, University of Guilan, 41635-1314, Rasht, Iran.
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Yao Q, Xu S, Dong Y, Quan L, Chen B. Ecdysone Receptor (EcR) and Ultraspiracle Protein (USP) Genes From Conopomorpha sinensis Bradley Eggs: Identification and Expression in Response to Insecticides. Front Physiol 2020; 11:851. [PMID: 32765302 PMCID: PMC7380065 DOI: 10.3389/fphys.2020.00851] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 06/24/2020] [Indexed: 11/13/2022] Open
Abstract
Conopomorpha sinensis Bradley (Lepidoptera: Gracilariidae) is the dominant insect pest of litchi (chinensis Sonn.) and longan (Euphoria longan Lour.) fruit trees. Management of this pest species is a challenging task due to its cryptic borer behavior. Controlling C. sinensis at the egg stage is the best alternative strategy to chemical control of C. sinensis adults. However, thorough studies regarding the indirect and sublethal effects of chemicals on the different developmental stages of C. sinensis are insufficient. In this study, the effect of some insecticides was evaluated on C. sinensis eggs. The ovicidal activity of chlorbenzuron, abamectin, chlorantraniliprole, and λ-cyhalothrin was confirmed by morphological observation of the defects in C. sinensis eggs. Moreover, we characterized four essential ecdysone receptor proteins in insects [i.e., two isoform ecdysone receptors (EcR: CsEcRA. CsEcRB) and two isoform ultraspiracle proteins (USP: CsUSP1, CsUSP2)] from C. sinensis eggs. The CsEcRA, CsEcRB, CsUSP1, and CsUSP2 genes consisted of 1521-, 1614-, 1410-, and 1236-bp open reading frames which encoded proteins of 506, 527, 469, and 413 amino acid residues, respectively. Furthermore, the embryonic differential responses of CsEcRs, CsUSPs, and vitellogenin receptor (VgR: CsVgR) to insecticides were evaluated by qRT-PCR. Among the five tested genes, CsVgR and CsUSP1 were the most sensitive to all the tested insecticides, with fold change of the expression diminished by 4.27–8.70 times compared with untreated control insects. The data suggests that these insecticidal compounds regulate the expression of these specific proteins, which might eventually lead to reduced viability of C. sinensis eggs. We present here the first data providing molecular elucidation of ecdysone receptor genes and their differential responses to insecticides in C. sinensis eggs. Together with our previous report of insecticide sublethal effects on two reproduction-related genes in C. sinensis adults, CsVgR and CsUSP1 seem to be appropriate molecular parameters for the evaluation of insecticide impact on C. sinensis. This study exemplifies the potential utility of transcriptional measurement of nuclear receptors as the molecular biomarkers for ecotoxicological evaluations of ovicidal impact of insecticides.
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Affiliation(s)
- Qiong Yao
- Guangdong Provincial Key Laboratory of New High Technology for Plant Protection, Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Shu Xu
- Guangdong Provincial Key Laboratory of New High Technology for Plant Protection, Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Yizhi Dong
- Guangdong Provincial Key Laboratory of New High Technology for Plant Protection, Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Linfa Quan
- Guangdong Provincial Key Laboratory of New High Technology for Plant Protection, Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Bingxu Chen
- Guangdong Provincial Key Laboratory of New High Technology for Plant Protection, Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, China
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Mendonça TP, Davi de Aquino J, Junio da Silva W, Mendes DR, Campos CF, Vieira JS, Barbosa NP, Carvalho Naves MP, Olegário de Campos Júnior E, Alves de Rezende AA, Spanó MA, Bonetti AM, Vieira Santos VS, Pereira BB, Resende de Morais C. Genotoxic and mutagenic assessment of spinosad using bioassays with Tradescantia pallida and Drosophila melanogaster. Chemosphere 2019; 222:503-510. [PMID: 30721808 DOI: 10.1016/j.chemosphere.2019.01.182] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 01/28/2019] [Accepted: 01/30/2019] [Indexed: 06/09/2023]
Abstract
Spinosad (SPN) is a naturally-occurring insecticide obtained from the fermentation process of the actinomycete Saccharopolyspora spinosa. Owing to the larvicidal action, the compound has been used in the control of Aedes aegypti. As a new insecticide commercially available in the market, few data are reported on genotoxic effects in non-target organisms. The objective of the present study was to evaluate the mutagenic effect of SPN through the Micronucleus Test in Tradescantia pallida (Trad-MCN) and using the mutation and somatic recombination test in Drosophila melanogaster (SMART). At the Trad-MCN, after acclimatization (24 h), T. pallida stems were submitted to chronic treatment with SPN at concentrations of 0.156; 0.312; 0.625; 1.25 and 2.5 g/L solution for 24 h, followed by a recovery period. In SMART, considering the third stage larvae, offspring resulting from the ST and HB crossing were placed on chronic treatment (48 h) with 0.039; 0.078 and 0.156 μg/mL of SPN solution. No mutagenic effect was observed at any of the evaluated concentrations in SMART. Additionally, SPN is more toxic after metabolism via CYP6A2 (cytochrome P450) in D. melanogaster. However, SPN at the concentrations of 0.625; 1.25 and 2.5 g/L was able to induce high frequency of micronuclei in T. pallida. Under the experimental conditions of T. pallida in the present study, SPN caused genotoxic activity.
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Affiliation(s)
- Tarcísio Paiva Mendonça
- Department of Cell Biology, Fundação Carmelitana Mário Palmério, 38500-000, Monte Carmelo, Minas Gerais, Brazil
| | - Jéssica Davi de Aquino
- Department of Cell Biology, Fundação Carmelitana Mário Palmério, 38500-000, Monte Carmelo, Minas Gerais, Brazil
| | - Weverson Junio da Silva
- Department of Cell Biology, Fundação Carmelitana Mário Palmério, 38500-000, Monte Carmelo, Minas Gerais, Brazil
| | - Daniele Ruela Mendes
- Department of Cell Biology, Fundação Carmelitana Mário Palmério, 38500-000, Monte Carmelo, Minas Gerais, Brazil
| | - Carlos Fernando Campos
- Institute of Biotechnology, Federal University of Uberlândia, Campus Umuarama, 38900-402, Uberlândia, Minas Gerais, Brazil
| | - Jéssica Soares Vieira
- Department of Cell Biology, Fundação Carmelitana Mário Palmério, 38500-000, Monte Carmelo, Minas Gerais, Brazil
| | - Nathalya Pereira Barbosa
- Institute of Biotechnology, Federal University of Uberlândia, Campus Umuarama, 38900-402, Uberlândia, Minas Gerais, Brazil
| | - Maria Paula Carvalho Naves
- Institute of Biotechnology, Federal University of Uberlândia, Campus Umuarama, 38900-402, Uberlândia, Minas Gerais, Brazil
| | | | | | - Mário Antônio Spanó
- Institute of Biotechnology, Federal University of Uberlândia, Campus Umuarama, 38900-402, Uberlândia, Minas Gerais, Brazil
| | - Ana Maria Bonetti
- Institute of Biotechnology, Federal University of Uberlândia, Campus Umuarama, 38900-402, Uberlândia, Minas Gerais, Brazil
| | - Vanessa Santana Vieira Santos
- Institute of Biotechnology, Federal University of Uberlândia, Campus Umuarama, 38900-402, Uberlândia, Minas Gerais, Brazil
| | - Boscolli Barbosa Pereira
- Institute of Biotechnology, Federal University of Uberlândia, Campus Umuarama, 38900-402, Uberlândia, Minas Gerais, Brazil; Institute of Geography, Federal University of Uberlândia, Campus Santa Mônica, 38400-902, Uberlândia, Minas Gerais, Brazil.
| | - Cássio Resende de Morais
- Institute of Biotechnology, Federal University of Uberlândia, Campus Umuarama, 38900-402, Uberlândia, Minas Gerais, Brazil
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Lutz AL, Bertolaccini I, Scotta RR, Curis MC, Favaro MA, Fernandez LN, Sánchez DE. Lethal and sublethal effects of chlorantraniliprole on Spodoptera cosmioides (Lepidoptera: Noctuidae). Pest Manag Sci 2018; 74:2817-2821. [PMID: 29766638 DOI: 10.1002/ps.5070] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 04/24/2018] [Accepted: 05/03/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND The Spodoptera cosmioides (Walker, 1858) population has increased in Bacillus thuringiensis Berliner (Bt) soybean crops in Argentina. As there are no registered products for its control, the recommended insecticides for S. frugiperda are used. The aim of this study was therefore to determine the lethal concentration (LC) of chlorantraniliprole and its sublethal effects on the biological and reproductive functions of S. cosmioides, an emerging soybean pest in Argentina. RESULTS An ingestion toxicity bioassay showed that chlorantraniliprole was active against larvae of the second instar, and after 48 h of exposure LC50 was 0.054 µg mL-1 H2 O. In the study of sublethal effect, chlorantraniliprole induced changes in the life cycle of exposed S. cosmioides, which required more time to complete all stages of development (larval, pupal and adult stages). Pupal weight was also higher in larvae exposed to sublethal concentrations of chlorantraniliprole. Adult fecundity was decreased: the number of eggs laid by each adult female moth, as compared with control females, was two (LC15 ) and eight (LC30 ) times lower. CONCLUSION These results indicate that chlorantraniliprole has toxicity against S. cosmioides larvae. Sublethal effects on the biological and reproductive performance of this species can help optimize integrated pest management programs. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Alejandra L Lutz
- Departamento de Producción Vegetal, Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Esperanza, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Isabel Bertolaccini
- Departamento de Producción Vegetal, Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Esperanza, Argentina
| | - Roberto R Scotta
- Departamento de Producción Vegetal, Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Esperanza, Argentina
| | - María C Curis
- Departamento de Producción Vegetal, Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Esperanza, Argentina
| | - María A Favaro
- Departamento de Producción Vegetal, Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Esperanza, Argentina
| | - Laura N Fernandez
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Daniel E Sánchez
- Departamento de Producción Vegetal, Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Esperanza, Argentina
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