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Nonconsumptive effects of parasitoids and predators in stored products: the impact of Theocolax elegans and other field-collected predators on the foraging of lesser grain borer and rice weevil. 储存品中寄生蜂和捕食者的非消耗效应:细孔线虫和其他田间捕获的捕食者对小螟虫和水稻象鼻虫觅食的影响
IF 4.1 1区 农林科学
Pest Management Science Pub Date : 2025-09-15 DOI: 10.1002/ps.70230
Matthew C Hetherington,Maria K Sakka,Jennifer Abshire,Jacqueline M Maille,Ian Stoll,Christos G Athanassiou,Erin D Scully,Alison R Gerken,William R Morrison
{"title":"Nonconsumptive effects of parasitoids and predators in stored products: the impact of Theocolax elegans and other field-collected predators on the foraging of lesser grain borer and rice weevil.","authors":"Matthew C Hetherington,Maria K Sakka,Jennifer Abshire,Jacqueline M Maille,Ian Stoll,Christos G Athanassiou,Erin D Scully,Alison R Gerken,William R Morrison","doi":"10.1002/ps.70230","DOIUrl":"https://doi.org/10.1002/ps.70230","url":null,"abstract":"BACKGROUNDTo date, prior research on the biological control of stored products has focused on the direct consumptive effects of parasitoids and predators. However, in other systems, trait-mediated indirect interactions or nonconsumptive effects have been shown to be as or more important in maintaining the suppression of pest populations. Thus, in this study, our aim was to evaluate the effect of the parasitoid, Theocolax elegans, the predator community around food facilities, and their associated chemical cues on the foraging behavior of Sitophilus oryzae and Rhyzopertha dominica.RESULTSWe evaluated consumptive predation of a variety of insect and arachnid predators on S. oryzae as well as effects on the foraging behavior of S. oryzae and R. dominica in a series of movement assays after exposure to adult T. elegans, headspace extracts from T. elegans or gryllids, and a facsimile gryllid model to determine potential nonconsumptive effects. We found the headspace from T. elegans colonies to be distinct from other treatments. The strength of nonconsumptive effects appeared to be greater after exposure to T. elegans adults compared to other predators or extracts. The presence of T. elegans in a block led to a 48-58% reduction in distance moved and 40-56% reduction in instantaneous velocity for the control and wheat treatments by S. oryzae and R. dominica compared to when wasps were absent. Rhyzopertha dominica exhibited 73% reduced frequency of entering the zone with wheat when adult T. elegans was present.CONCLUSIONSWe conclude that nonconsumptive effects may result in alterations in behavior by stored product insects, but these effects may vary by the coevolutionary relationship between the natural enemy and pest. Published 2025. This article is a U.S. Government work and is in the public domain in the USA.","PeriodicalId":218,"journal":{"name":"Pest Management Science","volume":"41 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059219","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}
引用次数: 0
Trans-2-decenal inhibits Alternaria alternata through disruption of redox homeostasis and membrane integrity. 反式-2-癸烯醛通过破坏氧化还原稳态和膜完整性来抑制交替稻瘟菌。
IF 4.1 1区 农林科学
Pest Management Science Pub Date : 2025-09-15 DOI: 10.1002/ps.70223
Hamza Tariq,Peiyu Chen,Gang Wang,Siyuan Xie,Lanning Wang,Jingkun Lv,Fei Wang,Muhammad Saqib Bilal,Abdur Rashid Khan,Nasir Ahmed Rajput,Danyu Shen,Daolong Dou
{"title":"Trans-2-decenal inhibits Alternaria alternata through disruption of redox homeostasis and membrane integrity.","authors":"Hamza Tariq,Peiyu Chen,Gang Wang,Siyuan Xie,Lanning Wang,Jingkun Lv,Fei Wang,Muhammad Saqib Bilal,Abdur Rashid Khan,Nasir Ahmed Rajput,Danyu Shen,Daolong Dou","doi":"10.1002/ps.70223","DOIUrl":"https://doi.org/10.1002/ps.70223","url":null,"abstract":"BACKGROUNDAlternaria alternata is a globally distributed plant pathogen infecting >400 plant species. Trans-2-decenal is a notable plant-derived secondary metabolite with strong volatility and antifungal properties, although its specific activity and mode-of-action against A. alternata remain unclear.RESULTSToxicity assays showed that trans-2-decenal inhibited A. alternata with a median inhibitory concentration (IC50) of 12.23 mg L-1. Treated with trans-2-decenal resulted in hyphal abnormalities, reduced spore production and suppressed spore germination. Mechanistically, it disrupted fungal cell membrane integrity, as confirmed by propidium iodide staining and increased leakage of DNA and soluble proteins in conductivity assays. Further investigations revealed that trans-2-decenal disrupted redox homeostasis by inducing reactive oxygen species (ROS) accumulation. DCFH-DA fluorescence staining showed elevated ROS levels, whereas antioxidant enzyme assays revealed dose-dependent changes, including decreased superoxide anion (O2.-) and catalase (CAT) activity, and significantly increased hydrogen peroxide (H2O2), superoxide dismutase (SOD) and malondialdehyde (MDA) levels, collectively indicating oxidative stress and damage. Transcriptome analysis identified 2319 differentially expressed genes (DEGs), with gene ontology (GO) enrichment highlighting inhibition of pathways associated with oxidative stress response, transmembrane transport and ribosome biogenesis. Molecular docking further suggested interactions between trans-2-decenal and key antioxidant enzyme and membrane transporter of A. alternata. In vivo assays showed that 32 mg L-1 trans-2-decenal fumigation achieved protective and curative efficacies of 97.14% and 96.54%, respectively, against yam leaf spot disease.CONCLUSIONTrans-2-decenal inhibited A. alternata through a multitarget synergistic mechanism, providing theoretical support for its development as a plant-derived biofumigant and a promising tool for the green management of A. alternata-induced diseases. © 2025 Society of Chemical Industry.","PeriodicalId":218,"journal":{"name":"Pest Management Science","volume":"19 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059233","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}
引用次数: 0
Flooding impairs plant resistance to piercing-sucking insects via ethylene-mediated suppression of callose deposition. 洪水通过乙烯介导的胼胝质沉积抑制损害植物对刺吸昆虫的抗性。
IF 4.1 1区 农林科学
Pest Management Science Pub Date : 2025-09-15 DOI: 10.1002/ps.70221
Yu-Die Xiong,Wen-Hao Han,Chan Zhao,Yu-Jie Chi,Jia-Jing Wang,Shu-Sheng Liu,Xiao-Wei Wang
{"title":"Flooding impairs plant resistance to piercing-sucking insects via ethylene-mediated suppression of callose deposition.","authors":"Yu-Die Xiong,Wen-Hao Han,Chan Zhao,Yu-Jie Chi,Jia-Jing Wang,Shu-Sheng Liu,Xiao-Wei Wang","doi":"10.1002/ps.70221","DOIUrl":"https://doi.org/10.1002/ps.70221","url":null,"abstract":"BACKGROUNDFlooding, a common natural disaster, frequently triggers outbreaks of herbivorous insects on plants. However, the molecular mechanisms underlying how flooding stress compromises plant defense against herbivores remain poorly understood.RESULTSThis study establishes that flooding significantly compromises plant resistance to herbivores. We found that this effect is mediated by enhanced ethylene production, a key hypoxia response triggered by flooding. Crucially, exogenous application of the ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC) mimicked the flooding phenotype, leading to a significant increase in the fecundity of both whitefly (Bemisia tabaci (Gennadius)) and aphid (Myzus persicae (Sulzer)) compared to control plants. Further investigation revealed that both flooding stress and ACC treatment substantially diminished callose accumulation - a critical physical barrier - at feeding sites induced by these herbivores. Mechanistically, this reduction in callose deposition was attributed to the down-regulation of PLASMODESMATA-LOCATED PROTEIN 5 (AtPDLP5), a key positive regulator of callose biosynthesis. Genetic evidence using Atpdlp5 mutants confirmed their reduced callose deposition and enhanced susceptibility to herbivores.CONCLUSIONIn summary, we demonstrate that flooding-induced ethylene signaling impairs herbivore resistance by inhibiting callose deposition via the down-regulation of AtPDLP5. This study elucidates how plants cope with concurrent biotic and abiotic stresses, revealing the molecular mechanisms underlying enhanced herbivore susceptibility in flooded plants. © 2025 Society of Chemical Industry.","PeriodicalId":218,"journal":{"name":"Pest Management Science","volume":"169 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059226","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}
引用次数: 0
Lateralized differences in ultrasonic courtship songs and their impact on reproductive strategies in Ostrinia furnacalis (Lepidoptera: Crambidae). 超声求偶鸣声的偏侧差异及其对金翅蛾生殖策略的影响。
IF 4.1 1区 农林科学
Pest Management Science Pub Date : 2025-09-13 DOI: 10.1002/ps.70216
Sohail Abbas,Aleena Alam,Muneer Abbas,Bilal Ahmad,Feng Xiao,Khalid Ali Khan,Hamed A Ghramh,Jamin Ali,Nora Edith Burroni,Menno Schilthuizen,Donato Romano,Qiyun Li,Ri-Zhao Chen
{"title":"Lateralized differences in ultrasonic courtship songs and their impact on reproductive strategies in Ostrinia furnacalis (Lepidoptera: Crambidae).","authors":"Sohail Abbas,Aleena Alam,Muneer Abbas,Bilal Ahmad,Feng Xiao,Khalid Ali Khan,Hamed A Ghramh,Jamin Ali,Nora Edith Burroni,Menno Schilthuizen,Donato Romano,Qiyun Li,Ri-Zhao Chen","doi":"10.1002/ps.70216","DOIUrl":"https://doi.org/10.1002/ps.70216","url":null,"abstract":"BACKGROUNDLateralized courtship behaviors in Ostrinia furnacalis (Guenée) play a pivotal role in reproductive success. However, the variation in ultrasonic courtship sounds produced by males during these lateralized displays, and their subsequent impact on mating success, remain unexplored. To address this gap, this study examined differences in the ultrasonic courtship song characteristics of left- and right-biased courtship displays and their influence on mating outcomes. Mating trials were conducted to record and analyze variations in ultrasonic courtship songs behaviours and associated acoustic parameters, including dominant frequencies, pulse durations, pulse intervals, and the number of pulses emitted during left- and right-biased displays, as defined by the male's turning direction during copulation attempts.RESULTSOur findings revealed that left-biased ultrasonic songs featured shorter pulse durations, tighter inter-pulse intervals, and dominant frequencies between 55 and 65 kHz. These acoustic traits closely matched profiles observed in successful mating events, whereas right-biased emissions (65-80 kHz) were frequently associated with unsuccessful mating attempts. Left-biased songs of shorter duration (28-38 s) were positively correlated with greater mating success, whereas the longer durations observed in right-biased displays (40-60 s) were linked to lower mating success. Moreover, males exhibiting left-biased courtship behavior required fewer mating attempts to achieve successful copulation.CONCLUSIONSThis study provides the first clear evidence of lateralized ultrasonic courtship behavior in O. furnacalis, with left-biased displays conferring a reproductive advantage. The findings highlight the ecological and evolutionary importance of acoustic lateralization in moth communication. Future research should investigate how ecological factors such as predator-driven selection, habitat structure, and female sensory biases influence these lateralized courtship behaviors. Such understanding can directly support more effective, behaviorally informed pest control strategies. These results contribute to the development of targeted approaches, such as pheromone traps and acoustic interference. © 2025 Society of Chemical Industry.","PeriodicalId":218,"journal":{"name":"Pest Management Science","volume":"24 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043478","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}
引用次数: 0
Design and synthesis of novel imidazo[1,2-b]pyridazine derivatives bearing arylhydrazine and dithioacetal groups as potential antifungal agents. 含芳酰肼和二硫缩醛的新型咪唑[1,2-b]吡啶衍生物的设计与合成。
IF 4.1 1区 农林科学
Pest Management Science Pub Date : 2025-09-12 DOI: 10.1002/ps.70219
Yong Li,Yong Zhang,Taotao Wu,Jian He,Wenzhang Chen,Tian Luo,Kuiying Ding,Xu Zhong,Lingling Fan
{"title":"Design and synthesis of novel imidazo[1,2-b]pyridazine derivatives bearing arylhydrazine and dithioacetal groups as potential antifungal agents.","authors":"Yong Li,Yong Zhang,Taotao Wu,Jian He,Wenzhang Chen,Tian Luo,Kuiying Ding,Xu Zhong,Lingling Fan","doi":"10.1002/ps.70219","DOIUrl":"https://doi.org/10.1002/ps.70219","url":null,"abstract":"BACKGROUNDGiven the issues of high toxicity and escalating fungicide resistance associated with the prolonged use of existing agricultural fungicide agents, the exploration and development of new, efficient, and low-toxicity small-molecule fungicides is of significant importance.RESULTSIn this study, several series of imidazo[1,2-b]pyridazine derivatives incorporating acylhydrazine, sulfonylhydrazine, amide, and dithioacetal pharmacophores were designed and synthesized. Preliminary antifungal activity assays revealed that compounds 5c, 5d, 5n, 7b, and 7c exhibited broad-spectrum and potent inhibitory activities against various plant pathogenic fungi. Notably, compound 5d demonstrated superior protective and curative effects compared with chlorothalonil against apple branches and potatoes infected by Valsa mali and Fusarium solani, respectively. In addition, 5d exhibited more promising protective and curative effects than boscalid against Chinese cabbages and tobacco infected by Alternaria brassicae and Alternaria alternata, respectively. Furthermore, preliminary mechanistic studies indicated that compound 5d exerts its antifungal effects by inhibiting spore germination and germ tube growth, as well as disrupting the integrity and permeability of the mycelial cell wall. Concurrently, the highly active compounds exhibited favorable safety profiles at the cellular level.CONCLUSIONThis study lays the foundation for the potential application of imidazo[1,2-b]pyridazine-based derivatives as novel fungicide candidates. © 2025 Society of Chemical Industry.","PeriodicalId":218,"journal":{"name":"Pest Management Science","volume":"51 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145036102","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}
引用次数: 0
Beauvericin, synthesized by entomopathogenic fungi, as a promising natural pesticide of Leptinotarsa decemlineata. Beauvericin是由昆虫病原真菌合成的一种很有前途的天然农药。
IF 4.1 1区 农林科学
Pest Management Science Pub Date : 2025-09-12 DOI: 10.1002/ps.70175
Meltem Ulusoy,Sevgi Aslıyüce,Mark S Goettel,Adil Denizli,Nevin Keskin
{"title":"Beauvericin, synthesized by entomopathogenic fungi, as a promising natural pesticide of Leptinotarsa decemlineata.","authors":"Meltem Ulusoy,Sevgi Aslıyüce,Mark S Goettel,Adil Denizli,Nevin Keskin","doi":"10.1002/ps.70175","DOIUrl":"https://doi.org/10.1002/ps.70175","url":null,"abstract":"BACKGROUNDBeauvericin (BEA) is a secondary metabolite produced by Beauveria bassiana, Isaria fumosorosea and Fusarium spp., known for its insecticidal properties. Leptinotarsa decemlineata, commonly known as the Colorado potato beetle, is a major pest that feeds primarily on potato plants. Over time, this species has developed resistance to many conventional insecticides, highlighting the need for novel control agents. BEA was purified from three B. bassiana and three I. fumosorosea strains using a molecularly imprinted cryogel column and tested for its efficacy against fourth-instar larvae of L. decemlineata. To determine the optimal method for its application, BEA derived from the B. bassiana Lul1 isolate was initially evaluated using three methods: injection, spraying and leaf-dipping.RESULTSThe lethal time for 50% mortality for the injection, spraying and leaf-dipping methods were determined to be 7.8, 8.5 and 9.7 days. The spraying method was selected for subsequent dose-mortality studies using four concentrations of BEA from three B. bassiana and three I. fumosorosea isolates, and a commercial BEA. Significant differences in the lethal concentration for 50% mortality (LC₅₀) values were observed across different post-exposure times. On days 5, 8 and 10, LC₅₀ values were 218.39, 0.07 and 0.04 μg/mL, respectively for the extract obtained from the B. bassiana isolate KVL 03129.CONCLUSIONIn conclusion, BEA has significant potential as an effective insecticide candidate for controlling L. decemlineata populations, offering a promising alternative to traditional chemical insecticides. © 2025 Society of Chemical Industry.","PeriodicalId":218,"journal":{"name":"Pest Management Science","volume":"27 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145036104","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}
引用次数: 0
Reproductive strategy of overwintering Dalbulus maidis (Hemiptera: Cicadellidae) in subtropical areas: neither temperature nor photoperiod, only corn triggers oviposition. 亚热带地区越冬少女黄蝶(半翅目:蝉科)的繁殖策略:不受温度和光照的影响,只有玉米才会触发产卵。
IF 4.1 1区 农林科学
Pest Management Science Pub Date : 2025-09-12 DOI: 10.1002/ps.70227
Guido Alejandro Van Nieuwenhove,Laura Patricia Bezdjian,Carina Paola Van Nieuwenhove,María Victoria Coll Araoz,María Violeta Macarena Casuso,Eduardo Gabriel Virla
{"title":"Reproductive strategy of overwintering Dalbulus maidis (Hemiptera: Cicadellidae) in subtropical areas: neither temperature nor photoperiod, only corn triggers oviposition.","authors":"Guido Alejandro Van Nieuwenhove,Laura Patricia Bezdjian,Carina Paola Van Nieuwenhove,María Victoria Coll Araoz,María Violeta Macarena Casuso,Eduardo Gabriel Virla","doi":"10.1002/ps.70227","DOIUrl":"https://doi.org/10.1002/ps.70227","url":null,"abstract":"BACKGROUNDThe corn leafhopper Dalbulus maidis, a key vector of corn stunt disease, poses a major threat to corn production across the Americas. In subtropical South America, females overwinter as active adults despite the absence of host plants. This study explored, for the first time, the reproductive status and adaptive strategies of D. maidis females overwintering in Tucumán, Argentina.RESULTSIn field, seasonal polyphenism was evident, with melanized females predominating in winter, likely enhancing cold tolerance. Females survive winter with inactive but fertilized ovaries, indicating a state of reproductive quiescence. Ovarian activation and egg-laying are triggered by host plant availability rather than environmental cues such as temperature or photoperiod. Nonetheless, temperature and photoperiod significantly influence the polyphenism of first-generation offspring - longer days and higher temperatures yield larger, lighter individuals, while colder, shorter days produce smaller, darker ones. Additionally, oviposition occurs almost exclusively during daylight hours.CONCLUSIONThe observed female-biased sex ratio and polyphenic variations suggest a combination of physiological and behavioral adaptations for winter survival. In overwintering females of the vector, access to corn plants is the key trigger for ovarian activation and the initiation of egg-laying. Despite not quantifying sperm load, overwintered females maintained > 80% fertility for over 2 weeks without male presence once corn was accessible. These findings underscore the importance of managing volunteer corn and standardizing early sowing to mitigate early infestations and economic losses due to D. maidis outbreaks in late-planted corn fields. © 2025 Society of Chemical Industry.","PeriodicalId":218,"journal":{"name":"Pest Management Science","volume":"67 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145036103","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}
引用次数: 0
Crystal structure of fatty acid thioesterase A bound by 129 fragments provides diverse development opportunities. 由129个片段结合的脂肪酸硫酯酶A的晶体结构提供了多样化的发展机会。
IF 3.8 1区 农林科学
Pest Management Science Pub Date : 2025-09-12 DOI: 10.1002/ps.70199
Ekaterina Kot, Matteo Paolo Ferla, Patricia Helen Hollinshead, Charles William Ernest Tomlinson, Daren Fearon, Jasmin Cara Aschenbrenner, Lizbé Koekemoer, Max Winokan, Michael Fairhead, Xiaomin Ni, Rod Chalk, Katherine Sara England, Laura Ortega Varga, Mark Greer Montgomery, Nicholas Phillip Mulholland, Frank von Delft
{"title":"Crystal structure of fatty acid thioesterase A bound by 129 fragments provides diverse development opportunities.","authors":"Ekaterina Kot, Matteo Paolo Ferla, Patricia Helen Hollinshead, Charles William Ernest Tomlinson, Daren Fearon, Jasmin Cara Aschenbrenner, Lizbé Koekemoer, Max Winokan, Michael Fairhead, Xiaomin Ni, Rod Chalk, Katherine Sara England, Laura Ortega Varga, Mark Greer Montgomery, Nicholas Phillip Mulholland, Frank von Delft","doi":"10.1002/ps.70199","DOIUrl":"https://doi.org/10.1002/ps.70199","url":null,"abstract":"<p><strong>Background: </strong>In order to alleviate the growing issue of herbicide resistance, diversification of the herbicide portfolio is necessary. A promising yet underutilized mode-of-action is the inhibition of fatty acid thioesterases (FATs), which terminate de novo fatty acid (FA) biosynthesis by releasing FAs from acyl carrier protein (ACP) cofactors. These enzymes impact plant growth and sterility by determining the amount and length of FAs present. In this study we report a crystallographic fragment screening approach for the identification of novel chemical matter targeting FATs.</p><p><strong>Results: </strong>We have solved the crystal structure of Arabidopsis thaliana FatA to 1.5 Å and conducted a crystallographic fragment screen which identified 129 unique fragments bound in 141 different poses. Ten fragments demonstrated on-scale potency, two of these exploiting different interactions to known herbicides. Elaboration of one of the fragments resulted in an improvement of affinity from ~20 μm to ~90 nm K<sub>D</sub>. Finally, superposition of our crystal structures revealed that some fragments exploit large conformational changes in the substrate binding site.</p><p><strong>Conclusion: </strong>We have fully enabled FatA as a target for rapid, rational hit-to-lead development, with robust structural, biophysical and biochemical assays. We provide a set of fragment hits which represent diverse, novel scaffolds that both recapitulate interactions made by current herbicides, and also target novel regions within the active and dimer sites. Our fragments can be readily merged and allow for effective catalogue-based structure-activity relationship (SAR) exploration. Together these data will accelerate the development of novel, alternative herbicides to combat herbicide resistance. © 2025 The Author(s). Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.</p>","PeriodicalId":218,"journal":{"name":"Pest Management Science","volume":" ","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145038784","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}
引用次数: 0
Proteomic dentification and functional characterization of venom protein HhUp140 of Habrobracon hebetor as a paralytic protein. 麻痹蛋白habrobron hebetor毒液蛋白HhUp140的蛋白质组学鉴定及功能表征。
IF 4.1 1区 农林科学
Pest Management Science Pub Date : 2025-09-12 DOI: 10.1002/ps.70210
Kaili Yu,Jin Chen,Chun He,Xinhai Ye,Xue Bai,Fang Wang,Hongwei Yao,Qi Fang,Juefeng Zhang,Qisheng Song,Gongyin Ye
{"title":"Proteomic dentification and functional characterization of venom protein HhUp140 of Habrobracon hebetor as a paralytic protein.","authors":"Kaili Yu,Jin Chen,Chun He,Xinhai Ye,Xue Bai,Fang Wang,Hongwei Yao,Qi Fang,Juefeng Zhang,Qisheng Song,Gongyin Ye","doi":"10.1002/ps.70210","DOIUrl":"https://doi.org/10.1002/ps.70210","url":null,"abstract":"BACKGROUNDParasitoid wasps play a crucial role in biological control of insect pests. Habrobracon hebetor (Say) is a prominent parasitoid wasp that targets a diverse array of field and storage pests, including Plodia interpunctella (Hübner). Its venom has the potential to serve as an effective pest control agent by disrupting the movement, metabolism, and development of hosts.RESULTSiTRAQ analysis of the hemolymph of P. interpunctella after parasitism by H. hebetor identified a total of 821 host response proteins. These host proteins showed significant differences in those related to neural signal transmission. Additionally, 12 potential venom proteins of H. hebetor were identified, including two homologous proteins (HhPp1 and HhUp140). Protein sequences analysis revealed HhPp1 has a total of 106 amino acids and was classified as a basic protein with a molecular mass of 11.09 kDa. HhUp140 comprises a total of 99 amino acids and was classified as an acidic protein with a molecular mass of 10.37 kDa. Both proteins were recombinantly expressed using the pET-28a(+) vector and subsequently injected into P. interpunctella larvae. After injection the host larvae exhibited whole-body paralysis, a diminished stress response, and even death of some individuals when the recombinant HhUp140-His was injected. And paralysis affected the pupation process of the larvae. However, no reactions were observed following the injection of recombinant HhPp1-His.CONCLUSIONThese results suggest that HhUp140 may function as a potential paralytic venom protein, while HhPp1 does not show any paralytic activity. © 2025 Society of Chemical Industry.","PeriodicalId":218,"journal":{"name":"Pest Management Science","volume":"73 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145036101","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}
引用次数: 0
Predation efficiency of praying mantises as important natural enemies of spotted lanternfly, Lycorma delicatula 作为斑灯蝇重要天敌的螳螂捕食效率研究
IF 4.1 1区 农林科学
Pest Management Science Pub Date : 2025-09-11 DOI: 10.1002/ps.70211
Kexin Bao, Yutong Zhuang, Yanlong Zhang, Xingeng Wang, Hannah J. Broadley, Mengxi Fan, Xiaoyi Wang
{"title":"Predation efficiency of praying mantises as important natural enemies of spotted lanternfly, Lycorma delicatula","authors":"Kexin Bao, Yutong Zhuang, Yanlong Zhang, Xingeng Wang, Hannah J. Broadley, Mengxi Fan, Xiaoyi Wang","doi":"10.1002/ps.70211","DOIUrl":"https://doi.org/10.1002/ps.70211","url":null,"abstract":"BACKGROUNDThe spotted lanternfly, <jats:italic>Lycorma delicatula</jats:italic> (White) (Hemiptera: Fulgoridae), has emerged as a globally important invasive insect pest, causing extensive damage to grapevines and ornamental plants in its invasive range. Praying mantises are commonly found in many native habitats of the spotted lanternfly in China. However, the role of predatory natural enemies such as mantises and their predatory efficiency as biological control agents for spotted lanternfly in this region is unknown. The predation efficiency of the five most common praying mantis species in northern China—<jats:italic>Hierodula petellifera</jats:italic>, <jats:italic>Mantis religiosa</jats:italic>, <jats:italic>Statilia maculata</jats:italic>, <jats:italic>Tenodera angustipennis,</jats:italic> and <jats:italic>Tenodera sinensis</jats:italic> (Mantodea: Mantidae) were evaluated—by measuring their functional responses to adult spotted lanternflies under controlled conditions. In addition, the intraspecific interference in predators were also examined by exposing a fixed ratio of mantis to prey densities.RESULTSBoth final instars and adults of all five species of mantis were found to readily prey upon spotted lanternfly adults, and their feeding rates increased linearly with prey abundance within the tested spotted lanternfly densities. Mutual interference by all tested mantid species was observed with increased predator density. Overall, <jats:italic>T. sinensis</jats:italic>, the largest‐bodied mantis tested, consumed more spotted lanternflies than other species, and <jats:italic>T. sinensis</jats:italic> adults were more efficient predators than their final instars.CONCLUSIONOur results show that praying mantises are important natural enemies of spotted lanternfly adults in their native range in China. These findings also provide insights into the potential efficacy of different mantis species as biocontrol agents for the spotted lanternfly and could be incorporated into future integrated pest management programs against this invasive pest. © 2025 Society of Chemical Industry.","PeriodicalId":218,"journal":{"name":"Pest Management Science","volume":"16 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145035265","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}
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