Biological Control最新文献

{"title":"Improved biocontrol performance of acid-tolerant Pseudomonas koreensis CLP-23 against Ralstonia solanacearum causing tobacco wilt","authors":"Zhang Guozheng ,&nbsp;Lin Wei ,&nbsp;Liu Jianyang ,&nbsp;Lin Yong ,&nbsp;Ye Chao ,&nbsp;Liu Tianbo ,&nbsp;Jing Wang","doi":"10.1016/j.biocontrol.2025.105934","DOIUrl":"10.1016/j.biocontrol.2025.105934","url":null,"abstract":"<div><div><em>Pseudomonas koreensis</em>, a subgroup of the <em>P. fluorescens</em> complex, is a potential plant growth-promoting rhizobacterium. The aim of this study was to evaluate the biocontrol effects of <em>Pseudomonas koreensis</em> CLP-23 against <em>R. solanacearum</em> under acidic conditions, both <em>in vitro</em> and <em>in vivo</em>. <em>P. koreensis</em> CLP-23 had an antagonistic activity against <em>R. solanacearum</em>, with the strongest antagonism at pH 5.5. Additionally, <em>P. koreensis</em> CLP-23 enhanced the plant growth-promoting (PGP) characteristics, including protease production, indole-3-acetic acid synthesis, and phosphate solubilization, particularly at a pH of 5.5. In pot and field, <em>P. koreensis</em> CLP-23 improved biomass accumulation and enhanced bioccontrol efficacy to tobacco wilt in soils with pH 5.5, respectively. Morover, <em>P. koreensis</em> CLP-23 significantly enhanced phosphatase and urease activities as well as available phosphorus and potassium contents in the rhizosphere soil within 45 d post-inoculation. Our results indicated that an acid-tolerant <em>P. koreensis</em> CLP-23 plays an important role in the tobacco wilt prevention, the process of growth enhancement under acidic soil.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"212 ","pages":"Article 105934"},"PeriodicalIF":3.4,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145712311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrating biological control as a sustainable approach for managing silver scurf and black dot in potatoes","authors":"Apsara Indhu Gopan ,&nbsp;Sabine Ravnskov ,&nbsp;Jens Grønbech Hansen ,&nbsp;Isaac Kwesi Abuley","doi":"10.1016/j.biocontrol.2025.105946","DOIUrl":"10.1016/j.biocontrol.2025.105946","url":null,"abstract":"<div><div>The potato (<em>Solanum tuberosum</em>) is a globally cultivated crop, but blemish diseases such as silver scurf (<em>Helminthosporium solani</em>) and black dot (<em>Colletotrichum coccodes</em>) cause significant quality and market losses, black dot could reduce yield up to 30–50 % with estimated market loss of ∼ £3 million yearly and silver scurf can cause tuber weight losses up to ∼ 17 %. The origins of these diseases are multifaceted, involving complex interactions among pathogens, environmental conditions, and the host plant. This review aims to offer a thorough examination of current knowledge on their biology, epidemiology, and management practices, highlighting that cultural practices such as crop rotation, reduced tillage, regulated irrigation, curing and controlled storage conditions reduce disease severity, but are insufficient as standalone management strategies. Numerous bacterial and fungal biocontrol agents have shown strong <em>in vitro</em> inhibition but still require field validation. Plant derived metabolites and microbial metabolites also exhibited potent antifungal activity against these diseases under <em>in vitro</em> dual culture assays, mini-tuber assays and as post-harvest protectants. Although combining biocontrol agents with early detection, optimized agricultural practices, and regulated storage conditions has not yet been fully validated for potato tuber blemish diseases, similar integrated pest management strategies have proven successful against other crop diseases, highlighting the potential of this approach but also signifying the need for further research. Thus, this review highlights the existing biological management approaches investigated against black dot and silver scurf and the possibility of incorporating it with other non-chemical approaches for sustainable management of these diseases.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"212 ","pages":"Article 105946"},"PeriodicalIF":3.4,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145788929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bioprotectants for the suppression of Ascochyta rabiei infection and inoculum production on chickpea (Cicer arietinum)","authors":"Melanie Bullock ,&nbsp;Bounnaliam Thammavongsa ,&nbsp;Luke G. Barrett ,&nbsp;Mohamed Cassim Mohamed Zakeel ,&nbsp;Louise F. Thatcher ,&nbsp;Susan J. Sprague","doi":"10.1016/j.biocontrol.2025.105950","DOIUrl":"10.1016/j.biocontrol.2025.105950","url":null,"abstract":"<div><div>Ascochyta blight, caused by the fungal pathogen <em>Ascochyta rabiei</em>, is one of the most widespread and devastating diseases affecting chickpeas globally. In Australia, protection against disease and yield loss is heavily reliant on synthetic fungicides, with implications for resistance development and environmental damage. Bioprotectants such as microbial biological control agents (BCAs) and biopesticides may provide alternatives to synthetic fungicides, however their efficacy against the current aggressive strains of <em>A.<!--> <!-->rabiei</em> on chickpea plants is unknown. Here we assessed representative bioprotectants for their ability to limit <em>A.<!--> <!-->rabiei</em> growth <em>in vitro</em>, as well as disease development and subsequent conidial spore inoculum load on chickpea seedlings under glasshouse conditions. Treatments included a strain of <em>Bacillus amyloliquefaciens</em> and a <em>Streptomyces</em> species, the fungus <em>Trichoderma harzianum,</em> a biofungicide formulation derived from <em>Streptomyces,</em> and synthetic fungicide controls. All bioprotectants demonstrated some level of <em>A. rabiei</em> growth suppression <em>in vitro</em>. However, only the biofungicide effectively reduced <em>in planta</em> disease development and conidial spore production, with a 48 % and 88 % reduction in stem disease severity and stem lesion lengths respectively compared to the control, comparable to levels achieved with synthetic fungicides. In a second <em>in planta</em> experiment, pre-treatment of plants with <em>B. amyloliquefaciens</em> 1 week prior to <em>A. rabiei</em> inoculation (compared to 24 h in experiment 1) suppressed stem lesion development, suggesting application timing may be crucial for optimising BCA efficacy. In view of efforts to reduce synthetic fungicide use and promote durable and sustainable integrated disease management strategies for Ascochyta blight control in chickpea, our findings identify bioprotectants such as the <em>Streptomyces</em>-derived biofungicide as candidates for evaluation under field conditions.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"212 ","pages":"Article 105950"},"PeriodicalIF":3.4,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145788928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Native Bacillus subtilis strains cultivated in a low-cost medium enhance maize growth and suppress seed-borne fungi by defense activation and rhizosphere colonization","authors":"César E. Falconí ,&nbsp;Viviana Yánez-Mendizábal ,&nbsp;Stephen B. Goodwin ,&nbsp;C.D. Cruz","doi":"10.1016/j.biocontrol.2025.105923","DOIUrl":"10.1016/j.biocontrol.2025.105923","url":null,"abstract":"<div><div>We evaluated two native <em>Bacillus subtilis</em> strains (CtpxS2-1 and CtpxS3-5) cultivated in low-cost DSF40–MOL5 medium as seed inoculants for maize (<em>Zea mays</em>). This study extends previous work by integrating molecular, physiological, and ecological endpoints under greenhouse conditions. Seed treatment with these strains enhanced germination rates and seedling vigor, suppressed seed-borne fungal pathogens, and promoted systemic defense responses. Quantitative RT-qPCR revealed upregulation of defense-related genes (<em>PR-1, PR-4, SOD-2</em>) and growth regulators (<em>ZmYUC1, PIN-3</em>), while biochemical assays confirmed increased auxin, chlorophyll, and antioxidant enzyme activities resulting in greater shoot and root biomass. Longitudinal monitoring demonstrated sustained rhizosphere colonization at the root apex and improved plant height and chlorophyll index over 90 days. These findings highlight DSF40-MOL5 as a cost-effective formulation enabling scalable <em>Bacillus</em>-based bioinoculants for sustainable maize production.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"211 ","pages":"Article 105923"},"PeriodicalIF":3.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145569856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An antifungal polypeptide from Bacillus amyloliquefaciens FS6 and its biocontrol potential against ginseng gray mold caused by Botrytis cinerea","authors":"Shuliu Guo ,&nbsp;Mingliang Chu ,&nbsp;Rui Wang ,&nbsp;Baohui Lu ,&nbsp;Ronglin He ,&nbsp;Xue Wang ,&nbsp;Jie Gao","doi":"10.1016/j.biocontrol.2025.105920","DOIUrl":"10.1016/j.biocontrol.2025.105920","url":null,"abstract":"<div><div>Gray mold, caused by <em>Botrytis cinerea</em>, is a globally devastating plant disease that severely threatens the economic sustainability of ginseng cultivation in Northeast China. Our previous field studies demonstrated that <em>Bacillus amyloliquefaciens</em> FS6 (BaFS6) exhibits strong biocontrol efficacy against ginseng gray mold. However, the underlying mechanism of its antifungal activity remained unclear. In this study, we identified an antifungal polypeptide (AFP) from <em>Ba. amyloliquefaciens</em> FS6 through comparative proteomic analysis. Prokaryotic expression of the <em>afp</em> gene in <em>Escherichia coli</em> yielded a recombinant protein (RP BaAFP) that significantly inhibited <em>Bo. cinerea</em> hyphal growth, conidial germination, germ tube elongation and disruption of cell wall integrity. Notably, RP BaAFP exhibited exceptional stability across a broad pH range (4–9), tolerated 2–8 h of UV irradiation, and retained activity at elevated temperatures (40–80 °C), outperforming the reference protein bovine serum albumin (BSA) in stability. Fermentation broth (FB) from <em>Ba. amyloliquefaciens</em> FS6 strain overexpressing <em>afp</em> (FS6-<em>BaAfp</em>OE) demonstrated superior antifungal activity compared to the wild-type <em>Ba. amyloliquefaciens</em> FS6 FB. Both RP BaAFP and the FS6-<em>BaAfp</em>OE cell-free FB effectively protected detached ginseng tissues and whole plants in greenhouse trials, significantly reducing <em>Bo. cinerea</em> infection. These findings elucidate the functional role of AFP in <em>Ba. amyloliquefaciens</em> FS6-mediated biocontrol and highlight its potential, along with the FS6 strain, for sustainable management of ginseng gray mold.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"211 ","pages":"Article 105920"},"PeriodicalIF":3.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145518189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of rhizosphere Streptomyces virginiae IRHB6 as a dual-agent for disease suppression and growth promotion in soybean","authors":"Hafsa Ashraf ,&nbsp;Yanru Zhou ,&nbsp;Dengqin Wei ,&nbsp;Yuze Li ,&nbsp;Feng Yang ,&nbsp;Xiaoling Wu ,&nbsp;Weiying Zeng ,&nbsp;Zudong Sun ,&nbsp;Taiwen Yong ,&nbsp;Xiaoli Chang","doi":"10.1016/j.biocontrol.2025.105925","DOIUrl":"10.1016/j.biocontrol.2025.105925","url":null,"abstract":"<div><div><em>Streptomyces</em> spp. are renowned for producing biologically active compounds and serving as biological control agents against plant diseases. In a previous study, <em>Streptomyces</em> strain IRHB6, isolated from the soybean rhizosphere, exhibited significant inhibitory activity against mycelial growth of <em>Fusarium oxysporum,</em> the causative agent of soybean root rot. To further characterize its biocontrol potential, we conducted comprehensive <em>in vitro</em> and <em>in vivo</em> assays to evaluate antagonistic effects on multiple phytopathogens, and assess plant growth-promoting capabilities. Our results showed that strain IRHB6 exhibited a colony morphology characterized by a wrinkled, rough surface texture and was identified as <em>Streptomyces virginiae</em> through multilocus sequence analysis (MLSA). The strain produced hydrolytic enzymes, siderophores, and indole-3-acetic acid (IAA), and exhibited phosphorus-solubilizing activity. A dual-cultural confrontation assay revealed that IRHB6 exhibited antagonistic traits against phytopathogens, particularly, <em>Fusarium</em> species responsible for soybean root rot and <em>Pseudomonas syringae</em> pv. <em>actinidiae</em> for kiwifruit canker. The induced expression of biosynthetic genes for siderophore pyoverdine (<em>pvdA</em>) as well as antibiotic polyketide (<em>T1PKS/NRPS-like</em> and <em>T2PKS</em>) further substantiates its capacity for producing bioactive compounds against phytopathogens. Furthermore, treatment with IRHB6 cell suspension significantly promoted plant growth. Critically, IRHB6 conferred substantial protective capabilities against <em>Fusarium</em> root rot. Based on these findings, <em>S. virginiae</em> IRHB6 represents a promising biocontrol agent for soil-borne disease as well as plant growth promotion.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"211 ","pages":"Article 105925"},"PeriodicalIF":3.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145615030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance of the predatory stink bug Arma custos against the tea tussock moth, Euproctis pseudoconspersa","authors":"Yin-Lin Mu ,&nbsp;Jun-Yi Gao ,&nbsp;Shuai Wang ,&nbsp;Lin Yang ,&nbsp;Xiang-Sheng Chen","doi":"10.1016/j.biocontrol.2025.105911","DOIUrl":"10.1016/j.biocontrol.2025.105911","url":null,"abstract":"<div><div>The tea tussock moth, <em>Euproctis pseudoconspersa</em>, is a major defoliator in tea plantations, causing significant yield losses. Its urticating hairs also pose a health risk to harvesters, disrupting agricultural activities. Overreliance on chemical control of these pests has led to ecological disruption and pesticide residue issues, highlighting the need for sustainable control tactics within integrated pest management (IPM) frameworks. The generalist predatory stink bug, <em>Arma custos</em>, has demonstrated efficacy against various Lepidopteran pests, but its potential for controlling <em>E. pseudoconspersa</em> remains unexplored. In this study we evaluated the biocontrol potential of <em>A. custos</em> against 3rd instar <em>E. pseudoconspers</em>a larvae through functional response assays, intra-specific interference tests, and field trials. Laboratory studies revealed that both 4th and 5th instar nymphs preyed on <em>E. pseudoconspersa</em> larvae. The maximum daily consumption was similar between the two nymphal instars. Predation rates plateaued post-satiation with increasing prey density, while the proportion of consumed prey declined. Both nymphal instars exhibited a Holling Type II functional response. Fourth instars demonstrated a higher attack rate and a greater theoretical maximum daily consumption than 5th instars. Search efficiency decreased with increasing prey density but was consistently higher in the 4th instar. Intra-specific interference intensified with predator density, reducing per capita predation efficiency. In field trials in Weng’an County, releases of 4th instar nymphs at a 1:2 predator–prey ratio resulted in a significant reduction of the pest population, with control efficacy reaching 78.96% after seven days, a level comparable to conventional biopesticides. Our study demonstrates the significant potential of <em>A. custos</em> as a biocontrol agent against <em>E. pseudoconspersa</em>. The operational parameters defined here, including the superior predator stage and an effective release ratio, establish a foundation for its practical integration into tea IPM systems to reduce reliance on chemicals.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"211 ","pages":"Article 105911"},"PeriodicalIF":3.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145569854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antifungal volatile organic compounds from Burkholderia sp. BV6 control gray mold disease of cherry tomato","authors":"Yu Zhang ,&nbsp;Minhua Chen ,&nbsp;Jierong Sang ,&nbsp;Shuxin Wei ,&nbsp;Jiming Shen ,&nbsp;Fan Wu ,&nbsp;Shuai Yao ,&nbsp;Yan Huang ,&nbsp;Zhoukun Li ,&nbsp;Zhongli Cui ,&nbsp;Xianfeng Ye","doi":"10.1016/j.biocontrol.2025.105935","DOIUrl":"10.1016/j.biocontrol.2025.105935","url":null,"abstract":"<div><div><em>Botrytis cinerea</em> is a fungal pathogen that acts as a necrotroph, causing gray mold disease and affecting over 1400 plants. The biocontrol effect of microbial volatile organic compounds (VOCs) in controlling postharvest diseases has gradually gained significant attention as a research hotspot. This study evaluated the biocontrol effects of VOCs produced by <em>Burkholderia</em> sp. BV6 on <em>B. cinerea</em> in <em>vitro</em> and in <em>vivo</em>. The results showed that the strain BV6 volatiles suppressed the mycelial growth of <em>B. cinerea</em>. The antifungal effect of strain BV6 volatiles against <em>B. cinerea</em> was enhanced by optimizing the inoculation method and inoculation quantity of strain BV6. The volatiles of strain BV6 showed wide-spectrum antifungal activity against several plant pathogenic fungi. Solid-phase microextraction gas chromatography-mass spectrometry (SPME-GC/MS) analysis identified 24 volatile compounds, the most abundant of which (2-nonanol, 2-nonanone, 2-tridecanol, and 2-undecanol) showed dose-dependent antifungal activity. Among them, 2-nonanol exhibited the strongest antifungal activity toward <em>B. cinerea</em>, with a minimum inhibitory volume (MIV) of 1.5 μL/plate (equal to 21.43 μL/L). Strain BV6 and 2-nonanol reduced the lesion diameter and disease severity of of gray mold in cherry tomatoes caused by <em>B. cinerea</em>. These results suggest that fumigation with 2-nonanol or strain BV6 is a promising method for protecting cherry tomatoes against gray mold disease. Furthermore, this study demonstrated the antifungal efficacy of both strain BV6 and 2-nonanol against <em>B. cinerea</em> and their biocontrol potential for postharvest cherry tomatoes.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"211 ","pages":"Article 105935"},"PeriodicalIF":3.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145680972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of priming by arbuscular mycorrhiza against Tetranychus urticae are maintained from laboratory conditions to real crop production","authors":"Beatriz Ramírez-Serrano ,&nbsp;Zhivko Minchev ,&nbsp;Victoria Pastor,&nbsp;Silvia Andrés-Moreno,&nbsp;Paloma Sánchez-Bel,&nbsp;Víctor Flors","doi":"10.1016/j.biocontrol.2025.105917","DOIUrl":"10.1016/j.biocontrol.2025.105917","url":null,"abstract":"<div><div>The two spotted spider mite <em>Tetranychus urticae</em> is a polyphagous pest that can adapt to hundreds of host plant species within few generations, causing important losses on relevant crops worldwide. Mycorrhizal symbiosis can improve plant resistance against diverse pests and pathogens in different plant species. Yet, the wider adoption of Mycorrhiza-Induced Resistance (MIR) in pest management is hindered by its high context-dependency. Here, we evaluate the efficacy of MIR in tomato against <em>T. urticae</em> performing multiple experiments, ranging from laboratory to real production conditions. We hypothesised that MIR would be functional to protect tomato plants against the mite from the lab to the field. MIR was observed under lab and semi-field conditions in artificial infestation bioassays. A targeted search of plant metabolites revealed a conserved MIR metabolic fingerprint to mites shared between citrus and tomato. It comprised two phenylpropanoids, malic acid and a flavonoid, two of them displaying a priming profile. MIR and chemical treatments were scaled up to real tomato production conditions. Plants inoculated with the mycorrhizal fungus <em>Rhizophagus irregularis</em> showed increased resistance to <em>T. urticae,</em> strongly reducing the natural infestation of the spider mite. Similarly, all the identified compounds caused a marked reduction in the incidence of the pest. Collectively, we show for the first time that MIR against <em>T. urticae</em> provides a consistent and strong protection in tomato in different culture scenarios, highlighting its context-stability in this pathosystem. MIR generates a specific fingerprint of secondary metabolites which enhance protection of tomato plants under real field conditions. We provide solid evidence supporting that MIR and MIR-related priming compounds could be valuable additions into IPM programs to improve tomato pest control.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"211 ","pages":"Article 105917"},"PeriodicalIF":3.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145518187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Saline-alkali stress triggers negative bottom-up effects on Binodoxys communis Gahan, a parasitoid of cotton aphid","authors":"Yu Gao ,&nbsp;Yan-Hui Lu","doi":"10.1016/j.biocontrol.2025.105912","DOIUrl":"10.1016/j.biocontrol.2025.105912","url":null,"abstract":"<div><div>In agro-ecosystems, parasitoids can be influenced by bottom-up forces, particularly abiotic stresses on their host’s plants, which can modulate parasitoid host preference and performance. Saline-alkali stress has emerged as a significant concern in recent years, yet research examining parasitoid performance under such conditions remains limited. This study investigated the effects of saline stress, alkali stress and mixed stress, simulated using NaCl and Na₂CO₃ on <em>Binodoxys communis</em> Gahan, a primary parasitoid of the cotton aphid, <em>Aphis gossypii</em> Glover. Our results revealed significant adverse effects of saline-alkali stresses on <em>B. communis</em>, which manifested as reduced rates of parasitism, longer larval developmental periods, reduced adult lifespans, and reduced adult survival rates. Furthermore, <em>B. communis</em> exhibited significantly reduced cumulative fecundity, a lower female sex ratio (F /F + M), and reduced values for population growth parameters (intrinsic rate <em>r</em>_m, finite rate of increase <em>λ</em>, and net reproductive rate <em>R</em>₀). Regression analysis, based on data from our previous research, found a significant positive relationship between the <em>R</em>₀ values of <em>B. communis</em> and <em>A. gossypii</em>, while weakly positive correlations were observed between these stresses and cotton aphid population growth (<em>r</em>_m) and the population finite rate in increase (<em>λ</em>). These findings suggest that saline-alkali stress reduces <em>B. communis</em> fitness through bottom-up effects, and they provide a theoretical foundation for integrated pest management and biological control strategies for farmers in extreme environments.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"211 ","pages":"Article 105912"},"PeriodicalIF":3.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145465228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}