Crop Protection最新文献

{"title":"Epicoccum thailandicum causes leaf spot disease on Pseudostellaria heterophylla in China","authors":"Xianxiong Liu ,&nbsp;Chengqing Yang ,&nbsp;Maoxian Wang ,&nbsp;Dengquan Liu ,&nbsp;Zhen Su ,&nbsp;Zhongshun Cai ,&nbsp;Junyi Gao ,&nbsp;Cheng Li ,&nbsp;Fengquan Liu","doi":"10.1016/j.cropro.2025.107525","DOIUrl":"10.1016/j.cropro.2025.107525","url":null,"abstract":"<div><div><em>Pseudostellaria heterophylla,</em> a perennial herbaceous plant of the Caryophyllaceae family, is widely cultivated in China because of its economic and medicinal value. Recent observations in Huangping, Guizhou Province, revealed a prevalent leaf spot disease affecting <em>P. heterophylla</em>, leading to decreased yields. This study identified the fungal species responsible for leaf spot disease in <em>P. heterophylla</em>. Phytopathogenic fungi were isolated from the leaves using a tissue isolation method. The purified cultures were cultivated in potato dextrose agar medium, subjected to morphological and molecular biology analyses, and evaluated for pathogenicity. Isolates obtained exhibited the hallmark pathogenic symptoms in accordance with Koch's postulates. Based on the morphological and molecular phylogeny of multi-loci (internal transcribed spacer, RNA polymerase II beta subunit, and β-tubulin) sequence data, <em>Epicoccum thailandicum</em> was identified as the causal agent. This study represents the first report of <em>E. thailandicum</em> as a pathogenic fungus infecting the leaves of <em>P. heterophylla</em>.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"202 ","pages":"Article 107525"},"PeriodicalIF":2.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145784823","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":"Biochemical characterization of actinobacterial metabolites and their potential application in the management of selected lepidopteran pests","authors":"Pedaveeti Suma ,&nbsp;D.N. Kambrekar ,&nbsp;P.U. Krishnaraj ,&nbsp;Y.P. Arun ,&nbsp;V. Naveen ,&nbsp;P. Harikrishnan ,&nbsp;Suresh R. Jambagi","doi":"10.1016/j.cropro.2025.107534","DOIUrl":"10.1016/j.cropro.2025.107534","url":null,"abstract":"<div><div>Lepidopteran pests such as <em>Plutella xylostella</em>, <em>Spodoptera litura</em>, and <em>Spodoptera frugiperda</em> cause severe yield losses worldwide, and their management is increasingly constrained by resistance development and environmental concerns associated with synthetic insecticides. Actinobacteria, particularly <em>Streptomyces</em> spp., are prolific producers of bioactive metabolites, many of which exhibit insecticidal properties. In this study, three actinobacterial isolates—<em>Streptomyces hyderabadiensis</em>, <em>S. racemochromogenes</em>, and <em>S. xiaminensis</em> were characterized for their insecticidal activity against second instar larvae of the above pests under laboratory and greenhouse conditions. Bioassays demonstrated significant larval mortality, ranging from 58 %to 68 % at 48 h post-treatment to 75 %−81 % at 72–96 h, with efficacy comparable to the reference insecticide (spinosad). Molecular identification based on 16S rDNA sequencing confirmed the identity of the isolates with 98–99 % similarity to reference strains. LC-MS analysis identified diverse insecticidal metabolites, including linoleic acid, farnesyl acetate, coumaroyl tyramine, huperzine A, delsemine A, 9-octadecenamide, and organophosphate esters, which act through multiple mechanisms such as acetylcholinesterase inhibition, juvenile hormone agonism, and disruption of cuticular and respiratory functions. All the tested actinobacterial strains showed equal efficacy across all three insect pests tested. These findings highlight the potential of actinobacterial metabolites as eco-friendly alternatives for lepidopteran pest management. Further exploration of their formulation and field applicability could contribute to the development of sustainable microbial biopesticides.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"202 ","pages":"Article 107534"},"PeriodicalIF":2.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880110","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":"Odors from nymphal exuviae attract nymphs and gravid females of the cotton seed bug, Oxycarenus hyalinipennis (Hemiptera: Oxycarenidae)","authors":"Ahmed M. Saveer,&nbsp;Gundersen-Rindal Dawn,&nbsp;Aijun Zhang","doi":"10.1016/j.cropro.2025.107521","DOIUrl":"10.1016/j.cropro.2025.107521","url":null,"abstract":"<div><div>The cotton seed bug (CSB), <em>Oxycarenus hyalinipennis</em> (Hemiptera: Oxycarenidae), globally emerging pest native to Africa, is a serious insect pest of cotton, posing a significant threat to crop yield and quality. Both nymphs and adults feed on developing cotton seeds. Volatile organic compounds (VOCs) are key mediators of behavioral responses in heteropteran insects, including CSB, influencing aggregation, mating, and oviposition. In this study, we evaluated the behavioral role of volatiles emitted from nymph exuviae of CSB. Using a combination of Y-tube olfactometer, dual-choice refuge, and dual-choice oviposition bioassays, we assessed the responses of different developmental stages and reproductive statuses to exuviae-associated VOCs. Our results showed that nymphs and mated females were significantly attracted to nymph exuviae VOCs, with nymphs showing &gt;78% and mated females &gt;73% preference in both the Y-tube and refuge assays, whereas unmated females and males (mated and unmated) exhibited no attraction or a slight aversion. Furthermore, gravid females preferentially oviposited on cotton seeds exposed to nymph exuviae VOCs, suggesting that these chemical cues signal suitable oviposition sites, optimizing the chances for the offspring survivorship. This study provides the first evidence that exuviae-associated VOCs in <em>O. hyalinipennis</em> serve as multifunctional semiochemicals, guiding both aggregation and reproductive behavior. These findings offer new insights into the chemical ecology of CSB and highlight potential avenues for semiochemical-based pest management strategies to control CSB population, including the development of attract-and-kill systems for use in integrated pest management (IPM) programs.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"202 ","pages":"Article 107521"},"PeriodicalIF":2.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145731111","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":"Climate change effects on the weed suppressive ability of several cover crop mixtures","authors":"Matthias Schumacher,&nbsp;Veronika Klimeck,&nbsp;Roland Gerhards","doi":"10.1016/j.cropro.2025.107514","DOIUrl":"10.1016/j.cropro.2025.107514","url":null,"abstract":"<div><div>Climate change effects, such as rising temperature, carbon dioxide levels and extreme weather events, impact agriculture directly by reduction of crop yields and indirectly by increasing damage of crop pests. Therefore, preventive methods of plant protection, like cover cropping in integrated weed management, gain in importance. Their performance, however, depends on soil moisture and temperature in late summer. This study examined the effects of elevated temperature (+5 °C) and increasing drought levels (no, mild and severe drought) on four commercial and two self-composed cover crop mixtures and their weed suppression performance in a split-plot greenhouse experiment from 2020 to 2022. Cover crop (CC) and weed biomass were assessed, along with weed control efficacy (WCE) and soil coverage. A canonical correspondence analysis (CCA) was performed to identify drought and temperature tolerant species. Both, elevated temperature and increasing drought level, reduced CC biomass and soil cover by 50 %, severe drought even by more than 80 %. Weed biomass was affected similarly, only severe drought reduced it by more than 90 %. Nevertheless, CC mixtures, and the self-composed mixtures in particular, reduced weed biomass further and showed consistently WCE of more than 80 % and up to 98 %. The CCA revealed that <em>Sorghum bicolor</em>, <em>Brassica carinata</em> and <em>Camelina sativa</em> are promising species for future CC mixtures. Even though their biomass and soil coverage were reduced drastically by the examined climate change effects, CC mixtures still showed a high weed control ability. This resilience might be improved further by adjusted sowing dates and establishment methods and in turn improve CC performance under adverse climate change conditions.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"202 ","pages":"Article 107514"},"PeriodicalIF":2.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145657151","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":"Misconceptions and advances in sustainable biocontrol of Botrytis cinerea in grapevines. A review","authors":"José Luis Padilla-Agudelo ,&nbsp;Elena Palencia Mulero ,&nbsp;Gianluigi Cardinali ,&nbsp;Jesús Manuel Cantoral ,&nbsp;Gustavo Cordero-Bueso ,&nbsp;Ileana Vigentini","doi":"10.1016/j.cropro.2025.107515","DOIUrl":"10.1016/j.cropro.2025.107515","url":null,"abstract":"<div><div>Gray mold, caused by the necrotrophic fungus <em>Botrytis cinerea</em>, is among the most destructive diseases of grapevine, with yield losses that can exceed 40–70 % depending on cultivar, climate and post-harvest handling. Growing fungicide resistance and policy-driven reductions in the use of synthetic pesticides further tighten control options, creating an urgent need for eco-friendly alternatives. Biological control agents (BCAs), including antagonistic yeasts, bacteria and filamentous fungi, address this need; however, their field performance is often inconsistent and misconceptions persist about pathogen ecology, optimal application timing and regulatory requirements.</div><div>This review consolidates recent progress in sustainable biocontrol of gray mold and analyses how four biocontrol-enhancing attributes: (i) antagonist diversity, (ii) solo <em>versus</em> consortium applications, (iii) protective formulations, and (iv) risk-aligned spray timing guided by disease-forecast models. The key findings are as follows: 1) new insights into multitrophic interactions now guide targeted strain selection; 2) precision-application technologies align BCA delivery with pathogen risk windows, reducing product losses; 3) innovative formulations and well-designed microbial consortia extend persistence under field stress; 4) epidemiological modelling reveals climate-driven shifts in gray-mold pressure and their implications for BCA success; and 5) adoption barriers can be lowered through harmonized regulation and grower education. Combining these attributes results in mean reductions in bunch-rot severity, outlining a credible pathway toward reliable, pesticide-sparing management of <em>B. cinerea</em> and supporting the transition to more sustainable viticulture.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"202 ","pages":"Article 107515"},"PeriodicalIF":2.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145689945","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":"Phosphonate balances cost and eco-safety, matching conventional fungicide efficacy in potato late blight management, but with agroecology-specific response","authors":"K. Sharma ,&nbsp;E. Atieno ,&nbsp;S. Nyawade ,&nbsp;A. Kumar ,&nbsp;E. Schulte-Geldermann","doi":"10.1016/j.cropro.2025.107499","DOIUrl":"10.1016/j.cropro.2025.107499","url":null,"abstract":"<div><div>Potato late blight caused by <em>Phytophthora infestans</em> imposes persistent yield and income losses in sub-Saharan Africa, requiring fungicide strategies tailored to agroecological and varietal contexts. This study assessed the efficacy, profitability, and environmental toxicity of three fungicides—metalaxyl-M + mancozeb (Ridomil Gold MZ®), mono- and di-potassium phosphite (phosphonate), and ametoctradin + dimethomorph (Orvego®). Metalaxyl-M + mancozeb (Metalaxyl-M + mancozeb) served as the commercial standard, with a no-spray control included as a baseline. Trials were conducted in Kenyan highland (&gt;2100 m a.s.l.) and midland (1800–2000 m a.s.l.) zones, using 19 potato cultivars classified by susceptibility as Susceptible, Moderate, or Resistant. Fungicides were applied every 7 days, averaging 11 and 9 sprays per season at the highland and midland sites, respectively. Disease was quantified using the relative area under the disease progress curve (rAUDPC), environmental toxicity using the Environmental Impact Quotient (EIQ), and profitability through net returns and benefit–cost ratios (BCRs). Ametoctradin + dimethomorph achieved the greatest rAUDPC reduction over no spray (−0.738), followed by metalaxyl-M + mancozeb (−0.598) and phosphonate (−0.491). Compared to metalaxyl-M + mancozeb, ametoctradin + dimethomorph was more effective (−0.140), while phosphonate showed near-identical efficacy (+0.001). Yield gains over no spray were +24.4 t/ha with ametoctradin + dimethomorph, +20.7 t/ha with phosphonate, and +17.8 t/ha with metalaxyl-M + mancozeb. Against commercial standard, ametoctradin + dimethomorph yielded a significant +7.1 t/ha gain, but a non-significant yield loss (−1.1 t/ha) with phosphonate. Net returns ranged from USD 7950–9500/ha (ametoctradin + dimethomorph), 6100–8600/ha (phosphonate), and 5500–8000/ha (metalaxyl-M + mancozeb), with BCRs of 19.8–20.8, 12.7–13.7, and 9.2–10.2. Phosphonate had the lowest environmental impact (150–183 EIQ/ha), cutting toxicity by 253–310 units relative to metalaxyl-M + mancozeb and 156–127 compared to ametoctradin + dimethomorph. Phosphonate showed a zone-specific response relative to metalaxyl-M + mancozeb, with reduced efficacy in the Highland (−14.76 %, p = 0.0071) and increased efficacy in the Midland (+12.91 %, p = 0.0282). These findings position phosphonate as a cost-effective, eco-safer option and ametoctradin + dimethomorph as more effective but costlier, with a moderate environmental impact. The zone-specific performance of phosphonate highlights trade-offs in its effectiveness and suitability across locations, shaping both farmer and policy decisions.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"202 ","pages":"Article 107499"},"PeriodicalIF":2.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145614102","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":"A review of integrated pest management practices in high tunnel specialty crop production","authors":"Eleanor L. Meys ,&nbsp;Samantha A. Willden ,&nbsp;Laura L. Ingwell ,&nbsp;Garima Kohli ,&nbsp;Kacie J. Athey","doi":"10.1016/j.cropro.2025.107530","DOIUrl":"10.1016/j.cropro.2025.107530","url":null,"abstract":"<div><div>High tunnels are a unique hybrid system of open field and greenhouse agriculture. As a result, pest dynamics and appropriate control methods differ from non-high tunnel environments. This paper aims to provide a comprehensive review of the current peer-reviewed research regarding arthropod pests and pest management techniques in high tunnels. We examine how pest populations compare between high tunnels and other forms of crop production and discuss how high tunnel conditions, such as seasonality and tunnel material, affect arthropod behavior. We look at the current knowledge of integrated pest management (IPM) practices in high tunnels, including monitoring methods, economic thresholds, cultural control, biological control, and chemical control. Research on monitoring methods and economic thresholds in high tunnels is limited. Current cultural control methods primarily include using banker plants and companion plants to attract natural enemies and insect exclusion netting to prevent the entrance of insect pests. Companion planting of cut flowers and wildflowers encourage natural enemy residence, but the efficacy of banker plants and exclusion netting is mixed. Biological control in high tunnels can be successful in managing common pests, such as <em>Tetranychus urticae, Frankliniella occidentalis,</em> and <em>Bemisia tabaci</em>; however, extreme temperatures in high tunnels can limit the efficacy of natural enemies. Chemical control research shows that pesticides are often needed in high tunnels due to high pest pressure and have a slower degradation rate in high tunnels than in open field agriculture. Ultimately, considerably more research is needed on potential IPM for arthropod control that would fit growers' needs.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"202 ","pages":"Article 107530"},"PeriodicalIF":2.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145813927","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":"Colletotrichum gigasporum causes postharvest fruit anthracnose on litchi in China","authors":"Min Li ,&nbsp;Jinhua Sun ,&nbsp;Gengxin Chen ,&nbsp;Zhengke Zhang ,&nbsp;Yajun Ran ,&nbsp;Meijiao Hu","doi":"10.1016/j.cropro.2026.107538","DOIUrl":"10.1016/j.cropro.2026.107538","url":null,"abstract":"<div><div>Litchi (<em>Litchi chinensis</em> Sonn.) is an economically important fruit crop in southern China. In May 2024, litchi fruits harvested from Haikou City, China, exhibited anthracnose-like symptoms, with a disease incidence (DI) of 7.6 % at 7 days of storage at 25 °C. Fungal colonies with consistent morphology were isolated from the margins of typical symptomatic pericarp tissues. The pathogen was identified as <em>Colletotrichum gigasporum</em> based on morphological characterization and multi-locus phylogenetic analysis utilizing sequences of the ITS region, <em>GAPDH</em>, <em>ACT</em>, <em>TUB2</em> and <em>CAL</em> genes Pathogenicity was confirmed by fulfilling Koch's postulates. To our knowledge, this is the first report of <em>C. gigasporum</em> causing postharvest anthracnose on litchi fruit in China.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"202 ","pages":"Article 107538"},"PeriodicalIF":2.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145920886","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":"Field-evolved resistance of Diaphorina citri (Hemiptera: Psyllidae) to insecticides in Brazil","authors":"Fernando Semmelroth de Assunção e Amaral ,&nbsp;Giovana Moraes de Souza ,&nbsp;Rafael Brandão Garcia ,&nbsp;Marcelo Pedreira de Miranda ,&nbsp;Celso Omoto","doi":"10.1016/j.cropro.2026.107535","DOIUrl":"10.1016/j.cropro.2026.107535","url":null,"abstract":"<div><div>In Brazil, control of the Asian citrus psyllid, <em>Diaphorina citri</em>, primarily relies on insecticides. Recently, field failures in controlling <em>D. citri</em> with some insecticides have been reported. This study investigates the susceptibility of five field populations of <em>D. citri</em> from key citrus-producing areas in the State of São Paulo, Brazil, to the three most used insecticides (bifenthrin, imidacloprid, and malathion). Subsequently, to characterize resistance under laboratory conditions, resistant strains were selected from one of the least susceptible field populations of <em>D. citri</em> located in Tabatinga, São Paulo. To provide evidence of field-evolved resistance, the effectiveness of imidacloprid was tested through foliar spray and soil drench applications. Leaf-dip bioassays characterized susceptibility of <em>D. citri</em> to bifenthrin, imidacloprid, and malathion. Resistance ratios among field populations of <em>D. citri</em> ranged from 39.6- to 192.7-fold for bifenthrin, 22.2- to 271.2-fold for imidacloprid, and 6.6- to 37.1-fold for malathion, compared to a susceptible reference strain. Following six generations of laboratory selection pressure in a field population of <em>D. citri</em>, resistance ratios increased to 1037.3-fold for bifenthrin, 790.6-fold for imidacloprid, and 298.9-fold for malathion. Low efficacy of imidacloprid against field populations of <em>D. citri</em> was observed in both application methods. This is the first report of field-evolved resistance of <em>D. citri</em> to bifenthrin, imidacloprid, and malathion insecticides in the citrus belt of São Paulo State, Brazil. Therefore, the evolution of resistance might be one of the reasons for the increased population density of <em>D. citri</em>. This research will help implement Insecticide Resistance Management (IRM) strategies for <em>D. citri</em> in Brazilian citrus groves.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"202 ","pages":"Article 107535"},"PeriodicalIF":2.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145893701","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":"First report of Diaporthe drenthii causing leaf spot disease of Hedera canariensis in Guizhou, China","authors":"Yu-Jia Sun ,&nbsp;Chada Norphanphoun ,&nbsp;Shan Wei ,&nbsp;Fatimah Al-Otibi ,&nbsp;Kevin D. Hyde ,&nbsp;Yong Wang","doi":"10.1016/j.cropro.2025.107520","DOIUrl":"10.1016/j.cropro.2025.107520","url":null,"abstract":"<div><div><em>Hedera canariensis</em> is commonly utilized in urban landscaping and greening initiatives due to its robust climbing ability, strong adhesion, and its role in enhancing air quality. This research identified a leaf spot disease affecting <em>H. canariensis</em> in Guizhou Province, China. The pathogen was isolated using the single-spore isolation method and identified based on morphological characteristics, with phylogenetic analysis of combined gene sequence data (ITS, <em>ef1-α</em>, and <em>β-tubulin</em>). The causal agent was identified as <em>Diaporthe drenthii</em>. Pathogenicity was confirmed under greenhouse conditions, satisfying Koch's postulates. This study documents the first instance of <em>D. drenthii</em> as a pathogenic fungus causing leaf spot disease in <em>H. canariensis</em>. The findings underscore a significant threat to the viability of <em>H. canariensis</em> posed by <em>D. drenthii</em>, providing a vital foundation for future research on the epidemiology and development of control strategies.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"202 ","pages":"Article 107520"},"PeriodicalIF":2.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145732404","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}