Phytopathology最新文献_第3页

Identification of a Major Rice Blast Quantitative Trait Loci Containing Pita/Pi39(t)/Ptr in USA Black Hull Awn Weedy Rice. 含Pita/Pi39(t)/Ptr主要稻瘟病数量性状位点的鉴定

IF 3.1 2区农林科学

Phytopathology Pub Date : 2025-09-15 DOI: 10.1094/PHYTO-02-25-0051-R

Aron Osakina, David Goad, Melissa H Jia, Kenneth M Olsen, Yulin Jia

{"title":"Identification of a Major Rice Blast Quantitative Trait Loci Containing Pita/Pi39(t)/Ptr in USA Black Hull Awn Weedy Rice.","authors":"Aron Osakina, David Goad, Melissa H Jia, Kenneth M Olsen, Yulin Jia","doi":"10.1094/PHYTO-02-25-0051-R","DOIUrl":"https://doi.org/10.1094/PHYTO-02-25-0051-R","url":null,"abstract":"Rice blast, caused by the ascomycete fungus Magnaporthe oryzae, is one of the most problematic diseases for rice production, threatening global food security. Genetic resistance to some M. oryzae races can be achieved using major resistance genes containing the corresponding avirulence (AVR) genes. Weedy rice, a close relative of cultivated rice that competes with the crop, has evolved unique genetic mechanisms to resist the infections of M. oryzae; thus, weedy rice can serve as an excellent resource for blast control. In this study, we assessed disease scores of 183 F5 and F6 recombinant inbred lines (RILs) derived from a weedy rice × crop biparental mapping population and their parental lines, a Black Hull Awn weedy rice strain (PI 653413, RR14) and the aus-196 rice variety, using four blast races IB33, IG1, IE1K and ICI7 under greenhouse conditions. All the parental lines were resistant to all blast races; however, RILs showed a wide degree of variation in resistance. Genotyping-by-sequencing of the RIL population and parents generated 1498 SNPs which were used to construct a linkage map, and QTL mapping of blast resistance was performed using r/qtl. A single major blast resistance QTL on chromosome 12 was mapped to the Pi-ta/Pi39(t)/Ptr locus. Identification of the Pi-ta/Pi-t39(t)/Ptr as the key contributor to blast resistance in weedy rice provides insight into the evolution and adaptation of weedy rice and can aid in development of blast resistant rice varieties through marker-assisted selection.","PeriodicalId":20410,"journal":{"name":"Phytopathology","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145065345","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}

引用次数: 0

Expert Knowledge Elicitation: Accessing the Big Data in Experts' Brains. 专家知识激发：获取专家大脑中的大数据。

IF 3.1 2区农林科学

Phytopathology Pub Date : 2025-09-15 DOI: 10.1094/PHYTO-06-25-0220-FI

Jacobo Robledo, Aaron I Plex Sulá, Lauren G Jaworski, Romaric A Mouafo-Tchinda, Kelsey F Andersen Onofre, Sara Thomas-Sharma, Karen A Garrett

{"title":"Expert Knowledge Elicitation: Accessing the Big Data in Experts' Brains.","authors":"Jacobo Robledo, Aaron I Plex Sulá, Lauren G Jaworski, Romaric A Mouafo-Tchinda, Kelsey F Andersen Onofre, Sara Thomas-Sharma, Karen A Garrett","doi":"10.1094/PHYTO-06-25-0220-FI","DOIUrl":"https://doi.org/10.1094/PHYTO-06-25-0220-FI","url":null,"abstract":"A vast amount of expert knowledge currently remains inaccessible to digital information systems. Expert knowledge elicitation is a systematic approach to accessing and synthesizing the insights of subject matter experts, especially when available objective data are incomplete. In plant pathology, expert knowledge elicitation is valuable for addressing urgent, uncertain, and/or future challenges, such as emerging disease threats, complex epidemiological systems, knowledge gaps when resources are limited, and future scenarios. This perspective explores when expert knowledge elicitation is most effective for addressing plant health challenges, emphasizing its role in informing timely, expert-based decisions. We discuss lessons learned from real-world implementations across diverse regions and pathosystems, highlighting strategies for eliciting, structuring, and interpreting expert-derived data, as well as associated caveats. We frame expert knowledge as a form of big data, and outline (i) how existing big-data streams (e.g., remote sensing, crowdsourced reports, and digital surveillance) can inform expert judgements; and (ii) how outputs from expert knowledge elicitation can be captured as scalable datasets (text, tabular, audio, and video) that enable AI-supported synthesis. We illustrate how expert knowledge can be integrated in Bayesian analyses, providing a transparent and rigorous approach to understanding uncertainty and improving inference. Finally, we outline future opportunities, including integration with artificial intelligence, to scale and strengthen expert knowledge elicitation in support of global plant health.","PeriodicalId":20410,"journal":{"name":"Phytopathology","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145070356","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}

引用次数: 0

Wheat Genotype S615 Carrying the Rmg8 Gene Exhibits Enhanced Antioxidant Defense for Resistance to Magnaporthe oryzae Triticum. 携带rm8基因的小麦基因型S615对稻瘟病的抗氧化防御能力增强。

IF 3.1 2区农林科学

Phytopathology Pub Date : 2025-09-10 DOI: 10.1094/PHYTO-06-25-0206-R

Md Saiful Islam, Mohammed Mohi-Ud-Din, Dipali Rani Gupta, Md Motiar Rohman, Totan Kumar Ghosh, Mahfuzur Rahman, Tofazzal Islam

{"title":"Wheat Genotype S615 Carrying the Rmg8 Gene Exhibits Enhanced Antioxidant Defense for Resistance to Magnaporthe oryzae Triticum.","authors":"Md Saiful Islam, Mohammed Mohi-Ud-Din, Dipali Rani Gupta, Md Motiar Rohman, Totan Kumar Ghosh, Mahfuzur Rahman, Tofazzal Islam","doi":"10.1094/PHYTO-06-25-0206-R","DOIUrl":"https://doi.org/10.1094/PHYTO-06-25-0206-R","url":null,"abstract":"Wheat blast caused by the fungus Magnaporthe oryzae Triticum (MoT) pathotype is a catastrophic disease that threatens global food security. Lately, Rmg8 was discovered as a blast resistance gene in wheat genotype S615. However, while Rmg8 has recently been cloned, the precise underlying biochemical and molecular mechanism by which this gene confers resistance against MoT, remains to be fully elucidated. This study investigated the antioxidant defense mechanisms in the wheat genotype S615, which carries the blast resistance gene Rmg8 against MoT infection, compared to the blast-susceptible wheat variety BARI Gom-26 (BG26). Artificial inoculation of wheat heads with MoT followed by biochemical analyses revealed that the levels of hydrogen peroxide (H2O2), lipoxygenases (LOX), and malondialdehyde (MDA) in rachis tissues increased significantly until 48 hours after inoculation in both S615 and BG26. However, LOX and MDA concentrations were substantially lower in S615 than BG26. These biochemical alterations may have contributed to less damage to photosynthetic pigments such as chlorophyll a, chlorophyll b, total chlorophyll (Tchl), and carotenoids in the rachis of S615. The S615 genotype exhibited significantly higher levels of several enzymatic (SOD, CAT, APX, GPX, GR, DHAR, and MDHAR) and non-enzymatic (e.g., proline) antioxidants in the MoT-inoculated rachis tissues than in those of BG26. To the best of our knowledge, this study biochemically demonstrates for the first time that the blast resistance in S615 is, in part, correlated with its strong antioxidant defense responses to MoT infection, providing a physiological basis for this resistance mechanism.","PeriodicalId":20410,"journal":{"name":"Phytopathology","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145030341","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}

引用次数: 0

The Natural Product Osthole, Known for Its Insecticidal and Antimicrobial Properties, Potentially Binds to Amidase, Offering a Novel Approach for Controlling Tomatoes Gray Mold for the First Time. 天然产物蛇床子素，以其杀虫和抗菌特性而闻名，可能与氨基酶结合，首次为控制番茄灰霉病提供了一种新方法。

IF 3.1 2区农林科学

Phytopathology Pub Date : 2025-09-10 DOI: 10.1094/PHYTO-06-25-0203-R

Qi Luo, Xiaotong Feng, Delu Wang, Wmww Kandegama, Qiang Bian, Zhuo Chen

{"title":"The Natural Product Osthole, Known for Its Insecticidal and Antimicrobial Properties, Potentially Binds to Amidase, Offering a Novel Approach for Controlling Tomatoes Gray Mold for the First Time.","authors":"Qi Luo, Xiaotong Feng, Delu Wang, Wmww Kandegama, Qiang Bian, Zhuo Chen","doi":"10.1094/PHYTO-06-25-0203-R","DOIUrl":"https://doi.org/10.1094/PHYTO-06-25-0203-R","url":null,"abstract":"Osthole exhibits strong inhibitory activity against phytopathogenic fungi; however, its antifungal mechanism remains unclear. This study assessed osthole's inhibitory effects on several phytopathogenic fungi, revealing a half-maximal effective concentration of 70.03 μg/ml against the hyphal growth of Botrytis cinerea. Micromorphological analysis showed that osthole caused abnormalities in the hyphae, including unclear organelle boundaries and organelle dissolution. Integrated transcriptomic and metabolomic assays and correlation analysis indicated that osthole induced differential expressed genes and differentially abundant metabolites, which were enriched particularly in the pathways of glyoxylate and dicarboxylate metabolism, tyrosine metabolism, glycerophospholipid metabolism, fructose and mannose metabolism, citrate cycle, biosynthesis of unsaturated fatty acids, and ABC transporters. Molecular docking and molecular dynamics simulations assays demonstrated that osthole binds stably to amidase, a key enzyme in energy metabolism, with a relative lower binding energies of -8.5 kcal/mol comparative to osthole's analogus, suggesting that amidase may be a potential target protein in the fungus. Microscale thermophoresis assay indicated that the dissociation constant (Kd) value for osthole binding to amidase was significantly lower compared to that of osthole's analogue, 7-methoxycoumarin. Overall, this study demonstrates that osthole disrupts energy metabolism, nitrogen metabolism, substance transport, and the metabolism of the hyphal cell wall and cell membrane, potentially targeting the amidase of B. cinerea. These findings highlight the potential of osthole for controlling gray mold.","PeriodicalId":20410,"journal":{"name":"Phytopathology","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145030326","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}

引用次数: 0

Multi-Omics Profiling Unveils Antifungal Secondary Metabolites Mediating Epicoccum layuense LQ's Biocontrol Efficacy Against Colletotrichum fructicola. 多组学分析揭示外生表皮菌LQ抗真菌次生代谢物对果炭疽菌的生物防治作用。

IF 3.1 2区农林科学

Phytopathology Pub Date : 2025-09-07 DOI: 10.1094/PHYTO-05-25-0157-R

Xingyun Li, Xiangchen Meng, Ying Tan, Zeshun Chen, Xuefan Hua, Peixian Zhao, Rong Zhang, Guangyu Sun, Xiaofei Liang

{"title":"Multi-Omics Profiling Unveils Antifungal Secondary Metabolites Mediating Epicoccum layuense LQ's Biocontrol Efficacy Against Colletotrichum fructicola.","authors":"Xingyun Li, Xiangchen Meng, Ying Tan, Zeshun Chen, Xuefan Hua, Peixian Zhao, Rong Zhang, Guangyu Sun, Xiaofei Liang","doi":"10.1094/PHYTO-05-25-0157-R","DOIUrl":"https://doi.org/10.1094/PHYTO-05-25-0157-R","url":null,"abstract":"Colletotrichum fructicola is a significant phytopathogen in both pre- and postharvest stages of fruit development and storage. The development of environmentally-friendly biological control agents has attracted increasing research interest. In this study, we characterized a fungal strain (Epicoccum layuense LQ) that strongly inhibits C. fructicola. Potato dextrose broth culture filtrate of strain LQ inhibited vegetative growth of C. fructicola by approximately 80% at 1:10 (v/v) dilution. Cytological observations revealed that the filtrate disrupted mitosis and cellular polarity during conidial germination. Furthermore, the culture filtrate effectively suppressed C. fructicola infection on both apple leaves and fruits. The fungal strain LQ was identified as E. layuense through integrated morphological characterization and multi-locus phylogenetic analysis. Whole genome sequencing of strain LQ identified 36 biosynthetic gene clusters (BGCs), subsequent gene synteny analysis demonstrated structural conservation in three BGCs homologous to known antifungal clusters. Notably, substitution of NaNO3 with yeast extract in Czapek-Dox medium enhanced the antifungal activity of strain LQ filtrate by 14.2-fold. Consistent with this finding, transcriptomic profiling revealed significant upregulation of BGCs associated with epipyrone A and burnettramic acid A biosynthesis under yeast extract supplementation condition. In sum, our results demonstrate the antagonistic potential of E. layuense LQ and identify two candidate BGCs that may mediate this biocontrol activity, which lays a foundation for further mechanism dissection.","PeriodicalId":20410,"journal":{"name":"Phytopathology","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145008503","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}

引用次数: 0

NIb Interaction Sites ³⁵⁹⁷AUU and ³⁶⁰⁷GGCU Are Crucial to the Replication of Wheat Yellow Mosaic Virus RNA2. NIb相互作用位点3597AUU和3607GGCU对小麦黄花叶病毒RNA2的复制至关重要。

IF 3.1 2区农林科学

Phytopathology Pub Date : 2025-09-07 DOI: 10.1094/PHYTO-05-25-0158-SC

Guowei Geng, Minjun Liu, Xueyuan Wang, Xuefeng Yuan

引用次数: 0

Population Genomic Analysis of Two Independent Clonal Invasions of the Sudden Oak Death Pathogen into One Forest. 橡树猝死病菌两次独立无性系入侵同一森林的种群基因组分析。

IF 3.1 2区农林科学

Phytopathology Pub Date : 2025-09-02 DOI: 10.1094/PHYTO-10-24-0329-FI

Nicholas C Cauldron, Hazel A Daniels, Jared M LeBoldus, Niklaus J Grünwald

{"title":"Population Genomic Analysis of Two Independent Clonal Invasions of the Sudden Oak Death Pathogen into One Forest.","authors":"Nicholas C Cauldron, Hazel A Daniels, Jared M LeBoldus, Niklaus J Grünwald","doi":"10.1094/PHYTO-10-24-0329-FI","DOIUrl":"10.1094/PHYTO-10-24-0329-FI","url":null,"abstract":"Upon introduction, clonal pathogen populations are expected to go through a genetic bottleneck followed by gradual clonal divergence. Two distinct and purely clonal lineages of the sudden oak death pathogen Phytophthora ramorum recently emerged in forests in the Western United States, providing the unique opportunity to study a naturally replicated invasion into the same ecosystem. We characterized population genomic patterns during early invasion using whole-genome sequencing of two P. ramorum clonal lineages sampled in the first 5 years following their detection. We re-sequenced genomes from populations of two dominant clonal lineages, NA1 (n = 134; 2001 to 2005) and EU1 (n = 160; 2015 to 2019), and obtained 106,070 high-quality single-nucleotide polymorphisms in genic regions. Our results are consistent with the hypothesis of one introduction for each lineage. The NA1 population had a wider distribution of pairwise genetic distances than EU1 and higher genetic diversity, though neither NA1 nor EU1 populations clustered clearly by year. There was significant correlation between genetic distance and geographic distance for NA1 (P = 0.042), but not for EU1 (P = 0.402). The genetic diversity in NA1 is strongly driven by loss of heterozygous positions, which impacted more than one-third of the sampled NA1 population. However, loss of heterozygosity was rare in EU1. This work provides novel insights into the invasion biology and dynamics of clonal plant pathogens in natural ecosystems.","PeriodicalId":20410,"journal":{"name":"Phytopathology","volume":" ","pages":"PHYTO10240329FI"},"PeriodicalIF":3.1,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144161503","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}

引用次数: 0

An Unconventionally Secreted Effector, VmUSP1, Targets Apple Heat Shock Protein 70 to Promote Infection. 一种非常规分泌的效应物VmUSP1靶向苹果热休克蛋白70促进感染。

IF 3.1 2区农林科学

Phytopathology Pub Date : 2025-09-01 Epub Date: 2025-09-09 DOI: 10.1094/PHYTO-12-24-0417-R

Chengli Wang, Tao Jiang, Meilian Li, Yonghui Lin, Ming Xu, Xuejing Wen, Daoyuan Zhang, Lili Huang

{"title":"An Unconventionally Secreted Effector, VmUSP1, Targets Apple Heat Shock Protein 70 to Promote Infection.","authors":"Chengli Wang, Tao Jiang, Meilian Li, Yonghui Lin, Ming Xu, Xuejing Wen, Daoyuan Zhang, Lili Huang","doi":"10.1094/PHYTO-12-24-0417-R","DOIUrl":"10.1094/PHYTO-12-24-0417-R","url":null,"abstract":"Apple Valsa canker, caused by Valsa mali/Cytospora mali, is a highly destructive disease that leads to significant economic losses annually. Pathogens manipulate host immunity to facilitate colonization and infection through the secretion of effector proteins, which are typically identified based on the presence of signal peptides. However, unconventional secretory effector proteins have been neglected, and little is known about their protogenetic roles in virulence. In this study, we demonstrate that an unconventional secreted protein 1 (VmUSP1) not only inhibits BAX- and INF1-induced cell death but also plays a crucial role in the complete virulence of V. mali. Furthermore, VmUSP1 lacks a typical signal peptide and exhibits characteristics of unconventional secretion. Through yeast two-hybrid, bimolecular fluorescence, and co-immunoprecipitation assays, we confirmed that VmUSP1 targets an apple (Malus × domestica) heat shock protein 70 (MdHSP70). MdHSP70 induces the accumulation of reactive oxygen species and callose while significantly enhancing plant resistance against pathogens. Additionally, VmUSP1 greatly compromises the MdHSP70-mediated resistance of apple against V. mali. Overall, these findings elucidate a mechanism by which an unconventionally secreted effector from V. mali suppresses host resistance by interfering with MdHSP70-mediated immune responses.","PeriodicalId":20410,"journal":{"name":"Phytopathology","volume":" ","pages":"1194-1203"},"PeriodicalIF":3.1,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144161485","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}

引用次数: 0

Draft Genome of 'Candidatus Phytoplasma pyri' and Phylogenetic Diversity Among Chilean and Italian Strains. “pyri候选植物原体”基因组草图及智利和意大利菌株的系统发育多样性。

IF 3.1 2区农林科学

Phytopathology Pub Date : 2025-09-01 Epub Date: 2025-09-08 DOI: 10.1094/PHYTO-01-25-0041-SC

Weier Cui, Carlos Alburquenque, Francesco Pacini, Constanza González, Pietro Bianco, Sebastian Cabrera, Tomás Llantén, Javiera Fuentes, Camila Gamboa, Assunta Bertaccini, Nicola Fiore, Alan Zamorano

{"title":"Draft Genome of 'Candidatus Phytoplasma pyri' and Phylogenetic Diversity Among Chilean and Italian Strains.","authors":"Weier Cui, Carlos Alburquenque, Francesco Pacini, Constanza González, Pietro Bianco, Sebastian Cabrera, Tomás Llantén, Javiera Fuentes, Camila Gamboa, Assunta Bertaccini, Nicola Fiore, Alan Zamorano","doi":"10.1094/PHYTO-01-25-0041-SC","DOIUrl":"10.1094/PHYTO-01-25-0041-SC","url":null,"abstract":"'Candidatus Phytoplasma pyri', the pathogen associated with pear decline, affects pear trees across both the old and new worlds. However, research on this phytoplasma has been limited by the lack of genomic data. This study presents the first draft genome of 'Ca. P. pyri' using a strain from Chile, with its genomic features analyzed in comparison with the closely related 'Ca. Phytoplasma' species 'Ca. P. mali' and 'Ca. P. prunorum'. The draft genome spans 456,478 bp with a GC content of 20.4%. Key genes possibly associated with pathogenicity and potential pathogenic effectors were identified, and they are notably lacking orthologs of known effectors. A single potential mobile unit similar to that of 'Ca. P. mali' was identified. It is characterized by the absence of the transposase tra5 and the presence of the IS3 family transposase iSErh1. Multilocus sequence analysis of six genetic markers (16S rRNA gene, LSU36p, tuf, aceF, secA, and secY) from 10 Chilean and 10 Italian samples revealed high genetic uniformity among the Chilean strains, collected from five geographically distant orchards over a span of 13 months; by contrast, strains with greater diversity were detected among those from Italy, collected from a few localities over approximately 30 years. These findings suggest limited evolutionary divergence of this phytoplasma in Chile. This study provides a foundational framework for investigations into the pathogenic mechanisms and evolutionary dynamics of 'Ca. P. pyri'.","PeriodicalId":20410,"journal":{"name":"Phytopathology","volume":" ","pages":"1080-1085"},"PeriodicalIF":3.1,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144040072","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}

引用次数: 0

Differential Response of Meloidogyne enterolobii, M. floridensis, M. haplanaria, and M. incognita to Sublethal Doses of Nonfumigant Nematicides. 非熏蒸性杀线虫剂对亚致死剂量的肠绵线虫、佛罗里达绵线虫、haplanaria和incognita的差异反应。

IF 3.1 2区农林科学

Phytopathology Pub Date : 2025-09-01 Epub Date: 2025-08-29 DOI: 10.1094/PHYTO-01-25-0028-R

Nabin Poudel, Richard F Davis, Paul M Severns, Theodore McAvoy, Ganapati B Jagdale, Timothy B Brenneman, Intiaz A Chowdhury

{"title":"Differential Response of Meloidogyne enterolobii, M. floridensis, M. haplanaria, and M. incognita to Sublethal Doses of Nonfumigant Nematicides.","authors":"Nabin Poudel, Richard F Davis, Paul M Severns, Theodore McAvoy, Ganapati B Jagdale, Timothy B Brenneman, Intiaz A Chowdhury","doi":"10.1094/PHYTO-01-25-0028-R","DOIUrl":"10.1094/PHYTO-01-25-0028-R","url":null,"abstract":"Root-knot nematodes (RKNs; Meloidogyne spp.) are among the most widespread and damaging plant-parasitic nematodes known. Although M. incognita is the most prevalent RKN species, other species, including M. enterolobii, M. floridensis, and M. haplanaria, have recently been detected in multiple Georgia, United States, vegetable fields. Producers use chemical nematicides to manage M. incognita populations because most vegetable crops do not have effective RKN host resistance. We evaluated the effects of sublethal doses of nonfumigant nematicides-fluazaindolizine, fluensulfone, fluopyram, and oxamyl-on motility, egg hatching, and reproduction of these four RKN species. In vitro behavioral response assays revealed significant variation in motility between species, with M. enterolobii being the less sensitive to the evaluated nematicides. RKN population response in greenhouse conditions indicated that all the nematicides impaired the reproduction of the evaluated Meloidogyne species. Whereas most nematicides displayed a strong effect on reducing the egg hatching, fluazaindolizine appeared to have a poor effect on suppressing the egg hatching across all RKN species. No differences were observed among Meloidogyne species in their egg-hatching responses to nematicides. In this study, we conducted the first comprehensive evaluation of these nematicides on motility, reproduction, and egg hatching in these RKN species. This study enhances our understanding of the species-specific responses of different Meloidogyne spp. to nonfumigant nematicides.","PeriodicalId":20410,"journal":{"name":"Phytopathology","volume":" ","pages":"1215-1222"},"PeriodicalIF":3.1,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144019912","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}

引用次数: 0