First Report of Root-Knot Nematode <i>Meloidogyne enterolobii</i> Infecting Sweetpotato in the State of Rio Grande do Norte, Brazil

HomePlant DiseaseVol. 105, No. 5First Report of Root-Knot Nematode Meloidogyne enterolobii Infecting Sweetpotato in the State Rio Grande do Norte, Brazil PreviousNext DISEASE NOTES OPENOpen Access licenseFirst BrazilE. M. Silva, A. Souza Pollo, D. Nascimento, R. J. Ferreira, S. Duarte, P. Fernandes, and L. SoaresE. Silvahttps://orcid.org/0000-0002-3196-6516São Paulo University (Unesp), Faculty Agricultural Veterinary Sciences (FCAV), Department Sciences, Nematology Laboratory (LabNema), Jaboticabal, São Paulo, BrazilSearch for more papers by this author, PolloSão Nascimento†Corresponding author: Nascimento; E-mail Address: [email protected]://orcid.org/0000-0003-4259-6386São FerreiraSão DuarteFênix Agro-Pecus Industrial Ltda., Tietê, Fernandeshttps://orcid.org/0000-0002-9536-8195São SoaresSão author AffiliationsAuthors Affiliations E. Silva1 Pollo1 Nascimento1 † Ferreira1 Duarte2 Fernandes1 Soares1 1São 2Fênix Published Online:9 Apr 2021https://doi.org/10.1094/PDIS-11-20-2472-PDNAboutSectionsView articlePDFPDF PlusSupplemental ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InRedditEmailWechat View articleThe sweetpotato (Ipomoea batatas L., Convolvulaceae family) originated Latin America is currently cultivated worldwide. The storage roots, rich calories, have made crop one main caloric sources low-income populations, especially developing countries. annually produces about 805,000 t, with northeast region responsible 34% production (Albuquerque et al. 2020). In October 2019, plants cultivar Campina, from a field Touros, state Norte (RN), (5°12′31″S, 35°34′42″W), presented deformed galls, typical root-knot nematodes. roots were sent where 14,032 eggs 3,312 second-stage juveniles (J2s) sp., 10 g recovered. species adults was identified through morphological, biochemical, phylogenetic analysis. perineal females (n = 10) an oval shape, high semitrapezoidal dorsal arch streak-free perivulval region. labial males rounded head cap, slightly set off body, without annulations. morphological characters compatible original description (Yang Eisenback 1983). phenotype esterase isoenzymes showed two major bands (VS1 S1) also characteristic (Esbenshade Triantaphyllou 1985). Sequences 18S rDNA (∼1,200 bp) individual (Holterman 2006) obtained sweetpotatoes before (SPme1 2) after inoculation (SPme3 6), guava, used as control, submitted Bayesian sequences genetic diversity among them resulting seven single nucleotide polymorphisms 99.4 99.9% identity deposited NCBI GenBank (accession nos. MW209034 MW209039). pathogenicity test carried out under greenhouse conditions, which 3,000 J2s population isolated inoculated seedlings (cv. Campina) 6). After 3 months, galls deformations nematodes, whereas noninoculated did not present any symptoms. An average 15,900 (reproductive factor 5.3) recovered proving that host species. known cause great damage (Ye 2021). Brazil, nematode had been reported once, Ceará state, suggested authors according electrophoresis enterolobii. Nonetheless, taxonomic, isoenzyme phenotypes molecular identification integratively, nor included tests (Silva 2016). Therefore, first time enterolobii, reliable different methods, including sequencing, detected commercial fields RN Brazil. local farmers deforms makes useless commercialization, minimal losses 50% infested areas. Furthermore, are vegetatively propagated, spread planting material favored. Considering importance report essential control measures pathogen be taken order avoid its other regions.The author(s) declare no conflict interest.References:Albuquerque, T. R., 2020. Food Biosci. 36:100614. https://doi.org/10.1016/j.fbio.2020.100614 Crossref, ISI, Google ScholarEsbenshade, Triantaphyllou, C. 1985. Nematol. 22:10. ScholarHolterman, M., 2006. Mol. Biol. Evol. 23:1792. https://doi.org/10.1093/molbev/msl044 ScholarSilva, 2016. Rev. Cienc. Agron. 47:710. https://doi.org/10.5935/1806-6690.20160085 ScholarYang, B., Eisenback, 1983. 15:381. ScholarYe, W., 2021. Plant Dis. doi.org/10.1094/PDIS-04-20-0816-RE ScholarThe interest.Funding: Part financial support Coordenação de Aperfeiçoamento Pessoal Nível Superior (CAPES) - Finance Code 001.DetailsFiguresLiterature CitedRelated Vol. 5 May 2021SubscribeISSN:0191-2917e-ISSN:1943-7692 DownloadCaptionSymptoms bacterial leaf spot on Cucurbita pepo days spray (L. Li al.). Photo credit: B. Li. Symptoms Fusarium wilt cyclamen (V. Guarnaccia Gullino. Metrics Downloaded 546 times Article History Issue Date: 26 Aug 2021Published: 9 2021First Look: 12 Jan 2021Accepted: 8 2021 Page: 1571 Information© American Phytopathological SocietyFundingCoordenação SuperiorGrant/Award Number: 001Keywordsnematodesfield cropsdisease managementroot-knot nematodeIpomoea batatassweetpotatoMeloidogyne enterolobiifirst occurrenceThe interest.