Rubens Candido Zimmermann, Ana Marta Schafaschek, Adélia Maria Bischoff, Matheus Beger, Julia Sant’ana, Sofia Bin de Macedo, Milena Ielen, Carlos Eduardo Nogueira Martins, Sarah da Costa Amaral, Rilton Alves de Freitas, Alessandra Benatto, Carolina Gracia Poitevin, Henrique da Silva Silveira Duarte, Joatan Machado da Rosa
{"title":"Toxicity of Melaleuca rhaphiophylla essential oils against Sitophilus zeamais and Sitophilus oryzae","authors":"Rubens Candido Zimmermann, Ana Marta Schafaschek, Adélia Maria Bischoff, Matheus Beger, Julia Sant’ana, Sofia Bin de Macedo, Milena Ielen, Carlos Eduardo Nogueira Martins, Sarah da Costa Amaral, Rilton Alves de Freitas, Alessandra Benatto, Carolina Gracia Poitevin, Henrique da Silva Silveira Duarte, Joatan Machado da Rosa","doi":"10.1007/s10340-025-01885-3","DOIUrl":"https://doi.org/10.1007/s10340-025-01885-3","url":null,"abstract":"<p>The <i>Melaleuca</i> genus has insecticidal activity against agricultural pests. In particular, <i>Melaleuca rhaphiophylla</i> essential oil (MREO) showed high toxicity against some stored product weevils in a short period. Therefore, the present study aimed to evaluate the sublethal dose and the effect on biochemical markers of MREO and its emulsion (MREM) against <i>Sitophilus zeamais</i> and <i>Sitophilus oryzae</i>. The emulsion was prepared by combining hydroxypropyl methylcellulose (HPMC) (2 wt%) with MREO to concentrations of 39.18 and 25.61 μL of substance L<sup>−1</sup> of air for <i>S. zeamais</i> and <i>S. oryzae</i>, respectively. The insecticidal activity of both MREO and MREM was evaluated by the fumigation method, followed by the determination of Glutathione S-Transferase (GST), esterase-α, esterase-β, superoxide dismutase (SOD), acetylcholinesterase (AChE) activities, and lipid peroxidation (LPO). The MREO caused a mortality rate above 25%, with an increase of AChE and LPO for both species, there was altered esterase-α for <i>S. zeamais</i> and inhibition of GST, esterase-α, esterase-β and SOD activity for <i>S. oryzae</i>. Meanwhile, the MREM caused a mortality rate of less than 1.5%, with an increase in GST, SOD, and LPO enzymes for both species, and an increase in the enzymatic activity of esterase-α for <i>S. oryzae</i>. Therefore, we concluded that MREO demonstrated higher insecticidal activity, while MREM caused continuous toxicity at fragmented doses caused by emulsion exposure, stimulating detoxification and resistance mechanisms.</p>","PeriodicalId":16736,"journal":{"name":"Journal of Pest Science","volume":"33 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143677658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marta Corbetta, Giovanni Benelli, Renato Ricciardi, Vittorio Rossi, Andrea Lucchi
{"title":"Adaptation of a physiologically based demographic model for predicting the phenology of Cryptoblabes gnidiella with validation in Italian vineyards","authors":"Marta Corbetta, Giovanni Benelli, Renato Ricciardi, Vittorio Rossi, Andrea Lucchi","doi":"10.1007/s10340-025-01868-4","DOIUrl":"https://doi.org/10.1007/s10340-025-01868-4","url":null,"abstract":"<p>The increasing spread and destructiveness of the honeydew moth, <i>Cryptoblabes gnidiella</i> (Lepidoptera: Pyralidae: Phycitinae), requires an effective pest management approach, in which the application of insecticides is based on the presence and abundance of the insect in the vineyard. Pest monitoring, however, is challenging because of the difficulties in identifying eggs and larvae. Forecasting models, particularly physiologically based demographic models (PBDMs), are helpful tools in the management of several agricultural insect pests. No PBDMs of note are available for <i>C. gnidiella</i> to date. Herein, we adapted a PBDM for <i>Lobesia botrana</i> to <i>C. gnidiella</i> by using literature data on insect developmental rates to fit temperature-dependent equations, and we validated the model by using independent data consisting of weekly male catches in pheromone traps placed in 16 wine-growing areas of Central and Southern Italy, between 2014 and 2022. Comparison of model predictions versus trap data of adults provided <i>R</i><sup>2</sup> = 0.922, CRM (coefficient of residual mass, a measure of the model tendency to overestimate or underestimate the observed values) = 0.223, and CCC (the concordance correlation coefficient) = 0.924. Goodness-of-fit results showed that the model was capable of correctly predicting <i>C. gnidiella</i> flights, with a little tendency to underestimate real observations. Overall, our results make the model quite realistic and potentially useful to support insect monitoring activities and decision-making in crop protection, at least in the contexts in which the model was validated. Further validations should be carried out to test the model ability to also predict the presence of <i>C. gnidiella</i> juvenile stages.</p>","PeriodicalId":16736,"journal":{"name":"Journal of Pest Science","volume":"56 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The nematode egg parasitic fungi, Niesslia gamsii and Polydomus karssenii, protect tomato against Meloidogyne hapla by priming and regulating the plant defence system","authors":"Milad Rashidifard, Wolfgang Maier, Samad Ashrafi","doi":"10.1007/s10340-025-01872-8","DOIUrl":"https://doi.org/10.1007/s10340-025-01872-8","url":null,"abstract":"<p>Plants employ different defensive strategies to limit or avoid nematode attacks, including the recruitment of beneficial microorganisms that can support plants by enhancing their defence mechanisms. We investigated the effect of the two nematode egg parasitising fungi, <i>Niesslia gamsii</i> and <i>Polydomus karssenii</i>, on nematode suppression on tomato using greenhouse experiments. Their potential against <i>Meloidogyne hapla</i> was evaluated by analysing direct parasitism and the expression of plant defence-related genes, through quantitative reverse transcriptase PCR. <i>Niesslia gamsii</i> and <i>P. karssenii</i> were originally isolated from naturally infested eggs of the cereal cyst nematode <i>Heterodera filipjevi</i>, and their nematode pathogenicity was proven through Koch’s postulates. Fungal treatments with <i>N. gamsii</i> and <i>P. karssenii</i> reduced by 32–31% <i>M. hapla</i> egg numbers per root system, respectively. Both treatments also significantly lowered the nematode reproduction rate (Rf value) when compared to the control. Both fungi affected the nematode root invasion by limiting penetration of <i>M. hapla</i> second-stage juveniles (J2) into tomato roots, 3 and 7 days after inoculation. The results showed a substantial effect of both fungi on inducing defence responses in tomato plants towards <i>M. hapla</i>. Pre-treatment with <i>N. gamsii</i> and <i>P. karssenii</i> led to the expression of different marker genes associated with pathogen response pathways, including salicylic and jasmonic acid/ethylene-regulated defensive. These findings suggest that <i>N. gamsii</i> and <i>P. karssenii</i> could prime the plant host for enhanced defence upon nematode attack.</p>","PeriodicalId":16736,"journal":{"name":"Journal of Pest Science","volume":"117 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Eugène Maurey, Ronan Marrec, Théo Brusse, Gaëtane Le Provost, Vincent Le Roux, Benjamin Bergerot, Gaël Caro
{"title":"When size matters: a morphological measurement that informs on the potential pest control function by soil arthropod communities","authors":"Eugène Maurey, Ronan Marrec, Théo Brusse, Gaëtane Le Provost, Vincent Le Roux, Benjamin Bergerot, Gaël Caro","doi":"10.1007/s10340-025-01879-1","DOIUrl":"https://doi.org/10.1007/s10340-025-01879-1","url":null,"abstract":"<p>Promoting pest control provided by soil arthropod communities can enhance sustainable agricultural production. Despite years of research aimed at predicting the pest control potential of these communities, few studies have described natural enemy communities composed of multiple taxonomic orders through a functional lens and identified traits involved in predator–prey interactions. Arthropod predator communities consist of individuals from several taxonomic orders exhibiting significant physical and behavioral differences that likely contribute differently to pest control. These inter-order differences justify the adoption of a functional approach, rather than a taxonomic one, to describe predator communities. However, there is no generalized functional trait identified to describe arthropod predator communities and predict the pest control potential by these communities. To address this knowledge gap, we reviewed 194 relationships from the literature, examining various traits and feeding characteristics for different groups of ground-dwelling arthropod predators (spiders, Coleoptera, and Chilopoda). We tried to determine whether a functional trait can be identified to explain the pest control potential across a multi-taxonomic assemblage. Each relationship was described in terms of the trait, the feeding characteristic, and the direction of the relationship in quantitative studies. Across all taxonomic groups, we consistently observed a positive relationship between predator body size and prey body size. This relationship was the most tested and the most shared among orders. Consequently, this study provides a proxy trait (body size) that can be used to predict a potential of predation and therefore inform on the pest control provided by multi-taxonomic assemblages of predators. </p>","PeriodicalId":16736,"journal":{"name":"Journal of Pest Science","volume":"21 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhen Shen, Liang-De Tang, Nicolas Desneux, Lian-Sheng Zang
{"title":"Diapause in parasitoids: a systematic review","authors":"Zhen Shen, Liang-De Tang, Nicolas Desneux, Lian-Sheng Zang","doi":"10.1007/s10340-025-01876-4","DOIUrl":"https://doi.org/10.1007/s10340-025-01876-4","url":null,"abstract":"<p>Parasitoids are important biological control agents, which play an active role in controlling agricultural and forestry pests. The diapause of parasitoids is crucial for controlling pest populations and preserving the ecological equilibrium in natural environments. Diapause has been studied for over 80 years. To date, diapause has been studied in approximately 178 species of parasitoids, including major families such as Braconidae, Trichogrammatidae, Ichneumonidae, and Encyrtidae. Among them, at least five species including <i>Trichogramma dendrolimi</i>, <i>T. cacoeciae</i>, <i>T. japonicum</i>, <i>T. brassicae</i>, and <i>Aphidius gifuensis</i>, have been utilized for production and application using diapause manipulation in parasitoid rearing. The development of omics technologies has accelerated the study of the underlying mechanism, but there remains a lack of in-depth investigation. This article reviews the research progress of diapause in parasitoids, encompassing environmental and biological factors inducing diapause, biological, and physiological response after diapause, and the mechanisms involved in diapause. Additionally, the potential applications of diapause parasitoids are explored. A deeper understanding of the diapause phenomenon in parasitoids and its molecular mechanisms is sought, with the goal of offering more effective strategies for ecosystem management and agricultural production.</p>","PeriodicalId":16736,"journal":{"name":"Journal of Pest Science","volume":"30 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143570463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Assessing the efficacy and generational stability of commercial transgenic maize resistance against key stored-product insect pests","authors":"J. Parsons, J. Riudavets, M. S. Lopes","doi":"10.1007/s10340-025-01880-8","DOIUrl":"https://doi.org/10.1007/s10340-025-01880-8","url":null,"abstract":"<p>Genetic resistance, particularly through transgenic Bt maize, has demonstrated high efficacy in pest control under field conditions. However, in storage conditions, maize is susceptible to different pest species, which compromises its quality. It is unknown how effectively the Bt maize functions in storage environments or if resistance is being inherited in later generations. This study investigates two commercial maize genotypes: a transgenic genotype expressing the Cry1Ab protein and its near-isoline counterpart. It utilizes commercial seeds of both genotypes (F1), along with seeds obtained from field-grown transgenic and near-isoline plants (F2), which represent the seeds stored by farmers and the agricultural industry. The aim is to assess their vulnerability to common insect pests that affect stored products. By assessing grain damage and insect population dynamics, we identify differences in resistance among these different maize genotypes and generations. Our findings show that transgenic maize exhibits strong resistance against <i>Sitotroga cerealella</i> but lower resistance against <i>Sitophilus zeamais</i>. The impact of <i>Oryzaephilus surinamensis</i> on both genotypes was negligible. Additionally, the resistance diminishes in the F2 generation. With <i>S. cerealella</i> the F2 transgenic experienced 55% more damage compared to the F1. Similarly, in the case of <i>S. zeamais</i>, the F2 maize produced five times more frass than the F1, highlighting a significant reduction in resistance. This research identifies the resistance characteristics of maize, highlighting the most suitable traits for assessing pest resistance in stored maize. It emphasizes the need for sustainable pest control with genetic resistance, ensuring long-term protection of stored grains, and minimizing post-harvest losses.</p>","PeriodicalId":16736,"journal":{"name":"Journal of Pest Science","volume":"29 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143538433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Artificially selected starvation-resistant lines of Pachycrepoideus vindemmiae with multiple beneficial traits: Shedding new light on stress resistance mechanisms and biological control applications of natural enemies","authors":"Ziwen Teng, Yunjie Liu, Minghao Jiang, Chun Jiang, Yikun Zhang, Chen Chen, Fanghao Wan, Hongxu Zhou","doi":"10.1007/s10340-025-01881-7","DOIUrl":"https://doi.org/10.1007/s10340-025-01881-7","url":null,"abstract":"<p>Artificial selection for stress resistance in natural enemies is a promising approach to enhance their effectiveness in biological control. However, documented cases regarding artificial selection for starvation resistance in natural enemy insects are lacking. This study addresses this gap by selecting starvation-resistant lines of the parasitoid wasp <i>Pachycrepoideus vindemmiae</i>, including food deprivation resistance lines and food and water deprivation resistance lines. Our results demonstrate that all selected lines exhibited significantly improved survival abilities compared to non-selected lines. Moreover, resistance to starvation persisted across generations without artificial selection under starvation conditions, indicating stable inheritance of this trait. We also observed extended lifespan in female adults and enhanced resistance to desiccation and low temperature in both males and females from the resistance lines. Additionally, we conducted preliminary exploration of the mechanisms underlying starvation resistance in these resistant lines through transcriptome sequencing for the first time. The analysis revealed that, under starvation stress, pathways such as amino acid metabolism and nucleotide metabolism exhibited consistent expression patterns in both resistant and non-resistant lines. However, specific pathways including arachidonic acid metabolism in lipid metabolism, and glyoxylate and dicarboxylate metabolism as well as glycolysis/gluconeogenesis in carbohydrate metabolism, were upregulated only in the resistant lines. These findings suggest that starvation resistance in the resistance lines involves multiple molecular pathways. This study represents the first successful artificial selection for starvation-resistant natural enemy lines, offering valuable insights for utilizing natural enemies effectively and understanding stress resistance mechanisms for potential genetic modification of beneficial traits.</p>","PeriodicalId":16736,"journal":{"name":"Journal of Pest Science","volume":"38 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143538434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Suelen C. Lima, André C. de Oliveira, Maria Luiza L. da Costa, Dayane D. Abensur, Aylane Tamara dos S. Andrade, Hergen V. de Souza, Cláudia P. S. Tavares, Sergio M. Nunomura, Rita C. S. Nunomura, Rosemary A. Roque
{"title":"Larvicidal effect and mechanism of action of the essential oil and major compound from Piper brachypetiolatum against Aedes aegypti larvae, with protection of non-target aquatic animals","authors":"Suelen C. Lima, André C. de Oliveira, Maria Luiza L. da Costa, Dayane D. Abensur, Aylane Tamara dos S. Andrade, Hergen V. de Souza, Cláudia P. S. Tavares, Sergio M. Nunomura, Rita C. S. Nunomura, Rosemary A. Roque","doi":"10.1007/s10340-024-01861-3","DOIUrl":"https://doi.org/10.1007/s10340-024-01861-3","url":null,"abstract":"<p>Botanical larvicides, such as essential oils (EO) from the <i>Piper</i> species, offer eco-friendly mosquito control by targeting Culicidae larvae while exhibiting low toxicity to non-target aquatic animals. This study investigated the larvicidal activity and mechanism of action of the essential oil (EO) from <i>Piper brachypetiolatum</i> and its main compound, (<u>E</u>)-nerolidol, against <i>Aedes aegypti</i>, as well as the effects on non-target aquatic organisms <i>Toxorhynchites haemorrhoidalis</i>, <i>Anisops bouvieri</i>, and <i>Diplonychus indicus</i>. The EO was extracted from the leaves of <i>P. brachypetiolatum</i> using hydrodistillation, yielding 1.5 ± 0.7%. Gas chromatography revealed the presence of sesquiterpenes (64.70%), oxygenated sesquiterpenes (17.64%), monoterpenes (11.76%), and oxygenated monoterpenes (5.88%), with (<i>E</i>)-nerolidol as the major compound (64.32%). The EO and (<i>E</i>)-nerolidol exhibited significant larvicidal activity against A<i>. aegypti</i>, with LC<sub>50</sub> values of 15.51 and 9.50 mg/L, respectively. They also inhibited AChE activity (IC<sub>50</sub> values of 44.97 and 11.07 mg/L, respectively) and induced RONS overproduction (<i>p</i> < 0.05) compared to the positive control, α-cypermethrin. Additionally, the EO and (<i>E</i>)-nerolidol showed no lethal effects on <i>T. haemorrhoidalis</i>, <i>A. bouvieri</i>, and <i>D. indicus</i>, with these species exhibiting 100% survival after exposure. In contrast, <i>α</i>-cypermethrin caused 100% mortality in these species. These findings highlight the potential of the EO from <i>P. brachypetiolatum</i> and (<i>E</i>)-nerolidol as effective and environmentally friendly alternatives for controlling <i>A. aegypti</i> larvae.</p>","PeriodicalId":16736,"journal":{"name":"Journal of Pest Science","volume":"28 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Julieta Soledad Arena, María Rosa Rossetti, Adriana Salvo
{"title":"Overall repellent effect of plant essential oils on insect choice behaviour: a meta-analysis","authors":"Julieta Soledad Arena, María Rosa Rossetti, Adriana Salvo","doi":"10.1007/s10340-025-01877-3","DOIUrl":"https://doi.org/10.1007/s10340-025-01877-3","url":null,"abstract":"<p>Essential oils are considered low environmental impact alternatives for the control of insects harmful to crops and human health. While there is extensive literature on the bioactivities of essential oils on insects, no quantitative syntheses have been conducted to provide a comprehensive overview of their effects. This study aimed to identify general patterns in the effects of essential oils on insect behaviour through meta-analysis, with a specific focus on their choice of food, oviposition sites, and resting sites. We also examined the influence of plant family, insect characteristics, and methodological aspects on these patterns. The results of the meta-analysis provided evidence of an overall repellent effect of essential oils on insects. Insects avoided feeding on food treated with essential oils, as well as laying eggs and staying in areas treated with these compounds. The choice of oviposition and resting sites was significantly influenced by the plant family from which the essential oil was obtained and by the insect order. Also, the insect feeding guild was a significant moderator for the three response variables, with hematophagous and granivorous insects showing stronger avoidance responses. Furthermore, immature insects were more strongly repelled by essential oils compared to adults in their food consumption, and effects of essential oils varied depending on the experimental scale. This study reports, for the first time, global patterns of bioactivity of essential oils on insects and highlights the great potential of these botanicals to be used as repellents in strategies to control agricultural pests and insects of health concern.</p>","PeriodicalId":16736,"journal":{"name":"Journal of Pest Science","volume":"210 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Exogenous methyl jasmonate-mediated physiological and transcriptomic network improves thrips tolerance in alfalfa (Medicago sativa)","authors":"Shuang Shuang, Xiaowei Huo, Qi Chen, Rui Dai, Jianwei Li, Jiaxin Yan, Xiaohong Jiang, Yao Tan, Zhiqiang Zhang","doi":"10.1007/s10340-025-01878-2","DOIUrl":"https://doi.org/10.1007/s10340-025-01878-2","url":null,"abstract":"<p>Exogenous methyl jasmonate is widely acknowledged for its role in triggering plants’ defense systems against pest invasions. Nonetheless, there has been a dearth of research exploring the elicitation of defense mechanisms by jasmonic acid in alfalfa. In order to investigate the effect of methyl jasmonate on thrips resistance in alfalfa, <i>Medicago sativa</i> L.cv. Caoyuan No. 4 was exogenously sprayed with different concentrations of methyl jasmonate, and thrips and <i>Orius strigicollis</i> (natural enemies) behavioral choice, physiological and transcriptomic analyses were performed. The results revealed a concentration-dependent inducible effect of methyl jasmonate on the behavioral choice, feeding and oviposition of thrips mediated by volatile organic compounds. Moreover, methyl jasmonate treatment at varying concentrations significantly influenced the activity levels of defense enzymes and secondary metabolites in alfalfa. Notably, the most pronounced induction effect of methyl jasmonate was observed at a concentration of 0.1 mmol/L, particularly evident in the enhanced activity of peroxidase, polyphenol oxidase, lipoxygenase and tannins. Transcriptome analysis showed that differentially expressed genes between methyl jasmonate treatment and control group (methyl jasmonate-free treatment) were mainly enriched in metabolic pathways and plant hormone signal transduction pathways such as terpenoid biosynthesis, linoleic acid metabolism and jasmonate signal transduction. Subsequent pathway analysis elucidated the potential of methyl jasmonate treatment to elevate endogenous jasmonic acid levels and instigate the activation of the jasmonate signaling pathway.</p>","PeriodicalId":16736,"journal":{"name":"Journal of Pest Science","volume":"83 1 Pt 2 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}