Neotropical Entomology最新文献

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Identification of Cryptic Beetle Species in the Cyclocephala Complex Using Reflectance Spectroscopy. 反射光谱法鉴定环头甲复合体中隐甲虫种类。
IF 1.4 3区 农林科学
Neotropical Entomology Pub Date : 2025-06-18 DOI: 10.1007/s13744-025-01292-4
Juan Carlos Marín-Ortiz, Mariano Altamiranda-Saavedra, Jhon Alveiro Quiroz Gamboa, Verónica Botero-Fernández
{"title":"Identification of Cryptic Beetle Species in the Cyclocephala Complex Using Reflectance Spectroscopy.","authors":"Juan Carlos Marín-Ortiz, Mariano Altamiranda-Saavedra, Jhon Alveiro Quiroz Gamboa, Verónica Botero-Fernández","doi":"10.1007/s13744-025-01292-4","DOIUrl":"https://doi.org/10.1007/s13744-025-01292-4","url":null,"abstract":"<p><p>Several methods are available for identifying insect species, primarily based on morphological characteristics, molecular taxonomy, and geometric morphometry. However, integrative taxonomy is emerging as a robust approach, especially for closely related or taxonomically challenging species. In this study, reflectance spectroscopy in the visible and near-infrared ranges was employed to identify three beetle species within the Cyclocephala complex. A multivariate analysis of the spectral data enabled the development of a standardized methodology for identifying species with complex taxonomy by using spectral measurements from the beetles' elytra. Eight specific wavelengths-400 nm, 430, 440, 480 nm, 640 nm, 680 nm, 710 nm, and 1000 nm-were identified as promising for use in indices and models applicable to Cyclocephala taxonomy. Linear discriminant models applied to the spectral reflectance data successfully separated species with classification accuracy up to 84%. These findings highlight the potential of reflectance spectroscopy within the 400-1000 nm range as part of a comprehensive methodology for discriminating insect species complexes.</p>","PeriodicalId":19071,"journal":{"name":"Neotropical Entomology","volume":"54 1","pages":"79"},"PeriodicalIF":1.4,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144326301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A New Species of Physocleora Warren 1897 (Lepidoptera: Geometridae) from Atacama and Puna Provinces, Northernmost Chile. 标题智利最北部阿塔卡马省和普纳省疣蛾属一新种1897(鳞翅目:尺蛾科)。
IF 1.4 3区 农林科学
Neotropical Entomology Pub Date : 2025-06-17 DOI: 10.1007/s13744-025-01281-7
Marcelo Vargas-Ortiz, Luis E Parra
{"title":"A New Species of Physocleora Warren 1897 (Lepidoptera: Geometridae) from Atacama and Puna Provinces, Northernmost Chile.","authors":"Marcelo Vargas-Ortiz, Luis E Parra","doi":"10.1007/s13744-025-01281-7","DOIUrl":"https://doi.org/10.1007/s13744-025-01281-7","url":null,"abstract":"<p><p>Riparian zones of the Atacama Desert and slopes of the Andes mountain range host a diversity of insect species still unknown, and some lineages of different species of Geometridae have been discovered in recent years in such areas. Here, we describe Physocleora polyphaga Vargas-Ortiz & Parra sp.nov., a polyphagous species closely related to several native plants, distributed in coastal valleys and slopes of the Andes mountain range in the northernmost Chile. We present their diagnostic morphological characteristics, some ecological traits, and a representation of its evolutionary history within Physocleora Warren 1897 from DNA barcode sequence data. To validate the hypothesis of conspecificity of the specimens found, we use species delimitation methods based on genetic distances and phylogenetics.</p>","PeriodicalId":19071,"journal":{"name":"Neotropical Entomology","volume":"54 1","pages":"72"},"PeriodicalIF":1.4,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144317519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Atlantochodaeus, A New Genus of Ochodaeidae Streubel, 1846 (Coleoptera, Scarabaeoidea) from Brazilian Atlantic Forest with Four New Species and Morphological Notes to the Family. 巴西大西洋森林金翅甲科金翅甲一新属(鞘翅目,金翅甲总科)。
IF 1.4 3区 农林科学
Neotropical Entomology Pub Date : 2025-06-17 DOI: 10.1007/s13744-025-01288-0
Vinícius da Costa-Silva, Rafael Sousa, Juares Fuhrmann, Paschoal C Grossi, Fernando Z Vaz-de-Mello
{"title":"Atlantochodaeus, A New Genus of Ochodaeidae Streubel, 1846 (Coleoptera, Scarabaeoidea) from Brazilian Atlantic Forest with Four New Species and Morphological Notes to the Family.","authors":"Vinícius da Costa-Silva, Rafael Sousa, Juares Fuhrmann, Paschoal C Grossi, Fernando Z Vaz-de-Mello","doi":"10.1007/s13744-025-01288-0","DOIUrl":"10.1007/s13744-025-01288-0","url":null,"abstract":"<p><p>Atlantochodaeus, a new genus of Ochodaeidae from the Brazilian Atlantic Forest is described, discussed, and illustrated. Additionally, four new species belonging to Atlantochodaeus are described: Atlantochodaeus everardoi n. sp. and Atlantochodaeus paulseni n. sp., both recorded from Rio de Janeiro State; Atlantochodaeus hucheti n. sp. from Espírito Santo, Minas Gerais, Rio de Janeiro, and São Paulo States, and Atlantochodaeus oliviae n. sp. from Minas Gerais State. Detailed descriptions of these species are accompanied by a differential diagnosis and a distribution map. A dichotomous key for all South American genera of Ochodaeidae and the species of Atlantochodaeus is provided to aid in identification. A comprehensive comparative morphology study regarding Parochodaeus pectoralis (LeConte, 1868) (type species of Parochodaeus) and the Atlantochodaeus species are discussed and illustrated. A discussion about gland, mycangium and stridulatory apparatus of Ochodaeinae are also provided. These findings emphasize the richness of the Atlantic Forest and underscore the importance of detailed taxonomic studies in revealing its biodiversity.</p>","PeriodicalId":19071,"journal":{"name":"Neotropical Entomology","volume":"54 1","pages":"74"},"PeriodicalIF":1.4,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12174289/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144317520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
First Record of Euschistus atrox (Westwood) (Hemiptera: Pentatomidae) on Soybean Fields in Brazil: Characterization, Reproductive Traits and Hybridization with Euschistus heros (Fabricius). 巴西黄豆田中首次记录褐蝽(半翅目:五蝽科):鉴定、繁殖性状及与大法氏褐蝽的杂交
IF 1.4 3区 农林科学
Neotropical Entomology Pub Date : 2025-06-17 DOI: 10.1007/s13744-025-01280-8
Mateus S L Aurélio, Frederico Hickmann, Ana Maria G Bernardo, Cleber M de Oliveira, Victoria Z Rossetti, Ana Paula G S Wengratt, Alberto S Corrêa, Cristiano Feldens Schwertner
{"title":"First Record of Euschistus atrox (Westwood) (Hemiptera: Pentatomidae) on Soybean Fields in Brazil: Characterization, Reproductive Traits and Hybridization with Euschistus heros (Fabricius).","authors":"Mateus S L Aurélio, Frederico Hickmann, Ana Maria G Bernardo, Cleber M de Oliveira, Victoria Z Rossetti, Ana Paula G S Wengratt, Alberto S Corrêa, Cristiano Feldens Schwertner","doi":"10.1007/s13744-025-01280-8","DOIUrl":"https://doi.org/10.1007/s13744-025-01280-8","url":null,"abstract":"<p><p>Euschistus heros (Fabricius) (Hemiptera: Pentatomidae) is Brazil's most significant soybean stink bug pest, with outbreaks well-documented across various regions. However, during a collection expedition in soybean crops in Amapá State, Euschistus atrox (Westwood) was identified as the predominant Euschistus species in these areas. In this study, we characterized E. atrox both morphologically and molecularly, comparing it with E. heros. A laboratory experiment was designed to compare reproductive traits between the two species, and test for interspecific crosses. Female E. atrox exhibited lower fecundity compared to E. heros. The most surprising finding was that intercrosses between E. heros and E. atrox resulted in fertile offspring. We highlight the implications of these findings for species evolution and pest management in this critical group of insect pests.</p>","PeriodicalId":19071,"journal":{"name":"Neotropical Entomology","volume":"54 1","pages":"73"},"PeriodicalIF":1.4,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144317521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Selectivity of Botanical and Synthetic Insecticides on Doru luteipes: There Is No Simple Answer. 植物和合成杀虫剂对多如叶黄素的选择性:没有简单的答案。
IF 1.4 3区 农林科学
Neotropical Entomology Pub Date : 2025-06-17 DOI: 10.1007/s13744-025-01289-z
Emile Dayara Rabelo Santana, Leonardo Vinicius Thiesen, Mariana Yamada, Gabryele Silva Ramos, Isabella Bueno, Leandro do Prado Ribeiro, Pedro Takao Yamamoto
{"title":"Selectivity of Botanical and Synthetic Insecticides on Doru luteipes: There Is No Simple Answer.","authors":"Emile Dayara Rabelo Santana, Leonardo Vinicius Thiesen, Mariana Yamada, Gabryele Silva Ramos, Isabella Bueno, Leandro do Prado Ribeiro, Pedro Takao Yamamoto","doi":"10.1007/s13744-025-01289-z","DOIUrl":"https://doi.org/10.1007/s13744-025-01289-z","url":null,"abstract":"<p><p>To achieve sustainability in agricultural pest management, it is essential to integrate chemical and biological control by using selective insecticides. In this study, we evaluated the lethal and sublethal effects of both botanical and synthetic insecticides used for controlling the fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), on its natural enemy Doru luteipes (Scudder) (Dermaptera: Forficulidae). For this purpose, bioassays of mortality, behavior, and transgenerational effects were conducted. Botanical insecticides rich in acetogenins and limonoids caused less than 30% mortality in D. luteipes nymphs (2nd, 3rd, and 4th instars). In contrast, chlorantraniliprole-based insecticide (Premio®) was highly toxic, presenting mortality above 80% at all nymphal stages and reducing predation capacity by 55.9% and walking velocity by 28.4% compared to the control. Aqueous emulsion of the ethanolic extract from Annona mucosa seeds (ESAM) reduced the longevity of the adults by 32.72 days compared to the control. Chlorantraniliprole resulted in the shortest pre-oviposition period (9.4 days), followed by a limonoids-based botanical insecticide (Azamax®) (11.0 days). Fourth-instar nymphs of the F<sub>1</sub> generation showed lower viability (54.5%) in the treatment with aqueous emulsion of the methanolic fraction from Annona montana leaves (EFAMON). The annonin-based commercial botanical insecticide (Anosom®) affected life table parameters, reducing the intrinsic growth rate (r<sub>m</sub> = 0.039) and finite rate of increase (λ = 1.04). These findings indicate that, under the specific exposure conditions used in this study, botanical insecticides are less hazardous to the natural enemy D. luteipes than synthetic insecticide. The data obtained highlight the selectivity of botanical insecticides and one synthetic insecticide for improving pest control while preserving natural enemies.</p>","PeriodicalId":19071,"journal":{"name":"Neotropical Entomology","volume":"54 1","pages":"75"},"PeriodicalIF":1.4,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144317522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interactive Effects of Temperature and Ateleia glazioviana Baill (Fabaceae) Toxicity on Aedes aegypti (Diptera: Culicidae) Mosquito Life-History Traits. 温度与绿僵蝗毒力对埃及伊蚊生活史特征的交互作用
IF 1.4 3区 农林科学
Neotropical Entomology Pub Date : 2025-05-31 DOI: 10.1007/s13744-025-01284-4
Amanda Cristina Ninov Pazini, Gilberto Dinis Cozzer, Raquel de Brito, Jacir Dal Magro, Cássia Alves Lima-Rezende, Daniel Albeny-Simões, Renan Souza Rezende
{"title":"Interactive Effects of Temperature and Ateleia glazioviana Baill (Fabaceae) Toxicity on Aedes aegypti (Diptera: Culicidae) Mosquito Life-History Traits.","authors":"Amanda Cristina Ninov Pazini, Gilberto Dinis Cozzer, Raquel de Brito, Jacir Dal Magro, Cássia Alves Lima-Rezende, Daniel Albeny-Simões, Renan Souza Rezende","doi":"10.1007/s13744-025-01284-4","DOIUrl":"10.1007/s13744-025-01284-4","url":null,"abstract":"<p><p>Understanding the complex interplay between environmental factors and mosquito populations is crucial for effective vector-borne disease control. In this study, we investigated the combined effects of temperature and Ateleia glazioviana toxicity on the development and survival of Aedes aegypti, utilizing artificial microcosms. The first experiment used A. aegypti eggs, with microcosms varying by room temperature (18 °C and 25 °C) and exposure to A. glazioviana leaves, either without prior incubation or with a 14-day pre-incubation period. The second experimental design involved introducing larvae, with microcosms varying by room temperature (18 °C and 25 °C) and exposure to A. glazioviana leaves after a 14-day incubation period. For both experiments, we used only ultra-pure water and food for the control. Our results demonstrate that plant leachate toxicity had a more pronounced effect than temperature, with increased toxicity levels driving higher larval mortality rates. This reduction in competition among surviving larvae led to the development of larger individuals, consistent with the temperature-size rule. Notably, the impact of leachate toxicity was most significant when A. aegypti was exposed during the egg stage. Additionally, we observed that elevated temperatures were linked to increased wing asymmetry and reduced body size, suggesting heightened developmental instability under environmental stress. These findings have important implications for biological control strategies, emphasizing the need for pre-emptive measures before oviposition. Moreover, they challenge the commonly held assumption that temperature alone is the dominant factor shaping A. aegypti populations in Neotropical regions, highlighting the complex role of other ecological stressors.</p>","PeriodicalId":19071,"journal":{"name":"Neotropical Entomology","volume":"54 1","pages":"70"},"PeriodicalIF":1.4,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144192040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electropenetrography (EPG) Study of Nezara viridula (L.) (Heteroptera: Pentatomidae) Adults Feeding on Canola Stem and Silique. 电渗透(EPG)技术研究病毒线虫成虫(异翅目:蝽科)对油菜茎和油菜的摄食。
IF 1.4 3区 农林科学
Neotropical Entomology Pub Date : 2025-05-31 DOI: 10.1007/s13744-025-01286-2
Elias Debon Bergamin, Tiago Lucini, Antônio Ricardo Panizzi, Alberto Luiz Marsaro Júnior, Márcia Aparecida Smaniotto, Bruno Galvêas Laviola
{"title":"Electropenetrography (EPG) Study of Nezara viridula (L.) (Heteroptera: Pentatomidae) Adults Feeding on Canola Stem and Silique.","authors":"Elias Debon Bergamin, Tiago Lucini, Antônio Ricardo Panizzi, Alberto Luiz Marsaro Júnior, Márcia Aparecida Smaniotto, Bruno Galvêas Laviola","doi":"10.1007/s13744-025-01286-2","DOIUrl":"10.1007/s13744-025-01286-2","url":null,"abstract":"<p><p>This research aimed to study the feeding behavior of Nezara viridula (L.) adults on canola stems and siliques using the electropenetrography (EPG) technique. Three distinct phases were identified: non-feeding (waveform Np), pathway (waveform Nv1-which was divided into three subtypes Nv1a, Nv1b and Nv1w), and feeding (waveforms Nv2 and Nv3), which follow previously identified waveforms for this species on soybean. The Nv3 waveform was divided into two subtypes (Nv3a and Nv3b). Biological meanings of the waveforms were proposed by correlating them with visual observations and histological studies. The waveform Np was correlated with insect resting/walking on plant surface; Nv1a with initial stylet insertion and secretion of gelling saliva to create a salivary sheath; Nv1b with deep stylet penetration plus secretion of more gelling saliva; Nv1w with stylet withdrawal, and Nv2 with xylem ingestion, as previously observed for N. viridula nymphs on soybean. Nv3a was correlated with laceration/maceration activities; and Nv3b with ingestion of the lacerated/macerated tissue. Regarding comparative analysis, the initial penetration and stylet withdrawal were both significantly longer on stems. Xylem ingestion did not differ significantly between substrates. Feeding events were more common on siliques, and overall duration of ingestion was greater on this substrate. Although no difference in overall duration of laceration/maceration (cell-rupture feeding strategy) was observed between stems and siliques, the average duration of each laceration/maceration event was greater on stems. Significantly more time was spent on non-feeding activities on siliques compared with stems.</p>","PeriodicalId":19071,"journal":{"name":"Neotropical Entomology","volume":"54 1","pages":"71"},"PeriodicalIF":1.4,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144192039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Oxidative, Genotoxic and Epigenotoxic Effects of Pimpla turionellae Venom at Pharmacological Perspective. 从药理学角度看丘疹毒的氧化、遗传毒性和表观毒性作用。
IF 1.4 3区 农林科学
Neotropical Entomology Pub Date : 2025-05-22 DOI: 10.1007/s13744-025-01283-5
Aslı Eskin, Zülbiye Demirtürk, Famil Yusufoğlu, Fevzi Uçkan
{"title":"Oxidative, Genotoxic and Epigenotoxic Effects of Pimpla turionellae Venom at Pharmacological Perspective.","authors":"Aslı Eskin, Zülbiye Demirtürk, Famil Yusufoğlu, Fevzi Uçkan","doi":"10.1007/s13744-025-01283-5","DOIUrl":"10.1007/s13744-025-01283-5","url":null,"abstract":"<p><p>Insects and mammals share a similar innate immune system. Galleria mellonella (L.), a beekeeping pest, is an alternative model organism for human health studies due to its immune response similarity and ability to be maintained at 37 °C. While oxidative stress and genotoxicity cause diseases, antioxidant enzymes and epigenetic mechanisms are effective in immunological response processes. Although parasitoid venoms are potential candidates for pharmacological applications such as anticoagulant, antibiotic, painkiller, antiviral and anticancer agents, the information pool is scarce to reflect their effects in humans. In an attempt to reveal the pharmaceutical significance of parasitoid venoms and their potential effects on human health, different venom doses of Pimpla turionellae (L.), the solitary endoparasitoid of G. mellonella, were injected into the host. Then, the levels of protein content, advanced oxidised protein products, lipid peroxidation, antioxidant power and glutathione in host haemolymph, and the amounts of methylation marker 5-methyldeoxycytidine monophosphate and strand breakage rates under neutral and alkaline conditions in host DNA were analysed. Principal component analysis was performed to determine the number of components that oxidative parameters depend on, and multivariate correlation analysis was applied to evaluate the effects of the parameters on each other. It was concluded that P. turionellae venom appeared to be one of the most effective pharmaceutical agents among parasitoid venoms. Also, the 0.01 venom reservoir equivalent dose qualified as immunotherapeutic dose.</p>","PeriodicalId":19071,"journal":{"name":"Neotropical Entomology","volume":"54 1","pages":"69"},"PeriodicalIF":1.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12098430/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144120001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Insecticidal Potential of Essential Oil and Sesquiterpene Alcohols from Leaves of Clausena indica (Dalz.) Oliver Against Spodoptera litura, Helicoverpa armigera, and Tribolium castaneum Under Laboratory and Field Conditions. 香茅叶精油和倍半萜醇的杀虫活性研究在实验室和野外条件下对斜纹夜蛾、棉铃虫和蜜蛾的研究。
IF 1.4 3区 农林科学
Neotropical Entomology Pub Date : 2025-05-20 DOI: 10.1007/s13744-025-01278-2
J Achyutha Devi, R Thangapandian, C Vijayaraghavan, Raja Rama Devi Patel, S Ravi Kiran
{"title":"Insecticidal Potential of Essential Oil and Sesquiterpene Alcohols from Leaves of Clausena indica (Dalz.) Oliver Against Spodoptera litura, Helicoverpa armigera, and Tribolium castaneum Under Laboratory and Field Conditions.","authors":"J Achyutha Devi, R Thangapandian, C Vijayaraghavan, Raja Rama Devi Patel, S Ravi Kiran","doi":"10.1007/s13744-025-01278-2","DOIUrl":"10.1007/s13744-025-01278-2","url":null,"abstract":"<p><p>Insects, due to their unrestricted reproduction, have been a long-known nuisance causing significant damage to various crops. Besides the synthetic chemical pesticides, the bioactive compounds derived from medicinal plants also make a positive contribution against the control of pests. In this concern, the present study investigated the biological activity of essential oil and isolated sesquiterpene alcohols, τ-cadinol and β-bisabolol, from Clausena indica leaves against three insect pests, Spodoptera litura, Helicoverpa armigera, and Tribolium castaneum. Four different concentrations (25, 50, 75, and 100 g L<sup>-1</sup>) of oil, τ-cadinol, and β-bisabolol in both normal and microencapsulated forms were tested for their efficacy in the field trial. Among all the compounds, τ-cadinol exhibited strong toxicity (LD<sub>50</sub> = 35.93-52.94 µg larva<sup>-1</sup>), antifeedant activity (DC<sub>50</sub> = 52.51-75.93 µg cm<sup>-2</sup>), and oviposition deterrent activity (OD<sub>50</sub> = 56.73-67.18 µg cm<sup>-2</sup>) against all the tested pests followed by β-bisabolol and leaf essential oil. Additionally, both the compounds demonstrated noteworthy acetylcholinesterase inhibitory activity with IC<sub>50</sub> values of 24.53-30.98 μg mL<sup>-1</sup> and 32.15-40.41 μg mL<sup>-1</sup> respectively comparable to the positive control, galantamine. Moreover, both τ-cadinol and β-bisabolol exhibited the strongest cytotoxicity against Sf9 cells lines with IC<sub>50</sub> of 15.27 and 17.82 µg mL<sup>-1</sup> respectively while IC<sub>50</sub> of 5.02 µg mL<sup>-1</sup> was shown by azadirachtin on the same cell line. Results of the field trial reveal that all tested compounds showed considerable mortality of S. litura and H. armigera. Although the treatments showed good insecticidal activity in the field trial, but modifications are required for the concentration of active ingredients in the formulation or even in the formulation to enhance the effect. The results obtained lay a foundation for future field applications of oil and isolated compounds as crop protectants.</p>","PeriodicalId":19071,"journal":{"name":"Neotropical Entomology","volume":"54 1","pages":"68"},"PeriodicalIF":1.4,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144111421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Insecticidal Activities and Mechanism of Action of Steroidal Saponins from Trillium govanianum Wall. ex D. Don Against Plutella xylostella (L.) and Aphis craccivora Koch. 枸杞中甾体皂苷的杀虫活性及作用机制研究。[4] Don .对小菜蛾(L.)和蚜虫。
IF 1.4 3区 农林科学
Neotropical Entomology Pub Date : 2025-05-16 DOI: 10.1007/s13744-025-01277-3
Prithvi Pal Singh, Urvashi, K S Sangeetha, Upendra Sharma, S G Eswara Reddy
{"title":"Insecticidal Activities and Mechanism of Action of Steroidal Saponins from Trillium govanianum Wall. ex D. Don Against Plutella xylostella (L.) and Aphis craccivora Koch.","authors":"Prithvi Pal Singh, Urvashi, K S Sangeetha, Upendra Sharma, S G Eswara Reddy","doi":"10.1007/s13744-025-01277-3","DOIUrl":"https://doi.org/10.1007/s13744-025-01277-3","url":null,"abstract":"<p><p>Diamondback moth, Plutella xylostella (L.), is a major pest of cruciferous crops, whereas Aphis craccivora is a major sucking pest of leguminous crops. Indiscriminate use of synthetic insecticides for the control of insect pests leads to insecticide resistance, harmful to natural enemies of pests, pollinators, the environment, and consumers' health. Therefore, it is necessary to screen/identify alternate strategies to control the target pests. Steroidal saponins, a group of specialized amphiphilic metabolites, are known for their various biological properties. There are a few reports on insecticidal activities of steroidal saponins. In the present study, insecticidal activities of nine diverse steroidal saponins isolated from Trillium govanianum were evaluated against Plutella xylostella and Aphis craccivora. Among the molecules, govanoside E (3) was found more effective against Plutella xylostella (LD<sub>50</sub> = 0.91 µL/insect) after 96 h of treatment followed by govanosides D and F (1.44 and 1.56 µL/insect, respectively). Similarly, govanoside E was also found effective against Aphis craccivora (LD<sub>50</sub> = 1.04 µL/insect) followed by dehydroxy-diosgenin and pennogenin-triglycoside (1.19 and 1.36 µL/insect, respectively). Furthermore, govanoside E (3) showed promising repellency (RC<sub>50</sub> = 1043.20 µL/L) against Plutella xylostella. The molecules also showed a dose-dependent relationship with inhibitory effects on the reproduction of Aphis craccivora. In vitro enzyme inhibition/mechanism study confirmed that govanoside E (3) inhibited glutathione-S-transferase (GST) and carboxylesterase (CES1) in test insects. The present study suggested the potential utilization of steroidal saponins for the control of target pests based on field bio-efficacy results.</p>","PeriodicalId":19071,"journal":{"name":"Neotropical Entomology","volume":"54 1","pages":"67"},"PeriodicalIF":1.4,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144079237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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