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- W2198255740 abstract "HomePlant DiseaseVol. 100, No. 5First Report of the Stubby Root Nematode Paratrichodorus allius on Sugar Beet in Minnesota PreviousNext DISEASE NOTES OPENOpen Access licenseFirst Report of the Stubby Root Nematode Paratrichodorus allius on Sugar Beet in MinnesotaG. P. Yan, M. Khan, D. Huang, X. Lai, and Z. A. HandooG. P. YanSearch for more papers by this author, M. KhanSearch for more papers by this author, D. HuangSearch for more papers by this author, X. LaiSearch for more papers by this author, and Z. A. HandooSearch for more papers by this authorAffiliationsAuthors and Affiliations G. P. Yan M. Khan D. Huang X. Lai , North Dakota State University, Department of Plant Pathology, Fargo, ND 58108-6050 Z. A. Handoo , USDA-ARS, Nematology Laboratory, Beltsville, MD 20705. Published Online:25 Feb 2016https://doi.org/10.1094/PDIS-10-15-1231-PDNAboutSections ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InRedditEmailWechat Stubby root nematodes are migratory ectoparasites that feed on roots, transmit tobraviruses, and cause significant crop loss (Mojtahedi and Santo 1999). In June 2015, three soil samples from a sugar beet field near Felton, Clay Co., MN, were submitted to the Nematology Laboratory at North Dakota State University for nematode assay. The soil texture was sandy, the current sugar beet cv. was BTS 8337, and the field was previously planted with wheat in 2014. Nematodes were extracted from 100 cm3 soil using the sugar centrifugal flotation method. Plant-parasitic nematodes were identified and counted to genus based on morphology. One of the samples was found to contain stubby root nematodes (60 per 100 cm3 soil). From August to November 2015, 10 soil samples were collected from the same field; five of them from an area with small and stunted plants, and five from an area with healthy plants. Nematodes were extracted, and all five samples from the area of stunted plants contained stubby root nematodes at 40 to 200 (avg. 95) per 100 cm3 soil. The five samples from healthy plants had no stubby root nematodes. Other nematode genera recovered from these samples included Pratylenchus, Paratylenchus, Helicotylenchus, and Tylenchorhynchus. Individual stubby root nematodes were hand-picked and examined morphologically and molecularly for species identification. The specimens were identified as Paratrichodorus allius (Jensen 1963) Siddiqi 1974 according to morphological and morphometric characteristics (Decraemer 1980). Morphological measurements of adult females (n = 7) included body length (range = 532.0 to 785.0 μm, mean = 695.6 μm), onchiostyle (42.0 to 45.0, 43.6), body width (40.0 to 52.0, 45.4), anterior end to basal bulb (115.0 to 155.0, 130.0), a (12.6 to 17.4, 15.4), b (4.1 to 6.0, 5.2), and V (48.4 to 58.4%, 53.0%). The anus and caudal pores were subterminal. Observations of female morphological characters critical for identification were: vaginal sclerotization rod-like/oval well separated, onchiostyle 42 to 45 μm, absence of lateral body pores, and small ventral pharyngeal overlap. DNA was extracted from single nematodes (n = 6) in 20 μl of extraction buffer. The D2/D3 region of 28S rRNA, two segments of 18S rRNA, and ITS1 rDNA were amplified with primer pairs D2A/D3B, SSUF07/SSUR26, 18S965+18S18P, and BL18/5818, respectively (Ye et al. 2015; Riga et al. 2007). The two segments of 18S rRNA sequences (GenBank Accession Nos. KT892733 and KT892734, 846 bp and 751 bp, respectively) were 100% identical with one population of P. allius (AJ439572) from Washington, and had 99% or less similarity with other Paratrichodorus spp. Sequence (KT892735, 776 bp) from the ITS1 rDNA was 97% homologous with one population of P. allius (KJ934124) from North Carolina, but had no significant similarity with other Paratrichodorus spp. The 28S D2/D3 sequence (KT892732, 738 bp) was less than 91% homologous with other Paratrichodorus spp., but P. allius sequence data were not available. The combination of the molecular tests confirmed the identity as P. allius. Problems with infestations of stubby root nematodes on sugar beet have been confined to parts of Europe, California, and Idaho. To our knowledge, this is the first report of P. allius from a sugar beet field in Minnesota.References:Decraemer, W. 1980. Rev. Nematol. 3:81. Google ScholarMojtahedi, H., and Santo, G. S. 1999. Am. J. Potato Res. 76:273. https://doi.org/10.1007/BF02853625 Crossref, ISI, Google ScholarRiga, E., et al. 2007. Am. J. Potato Res. 84:161. https://doi.org/10.1007/BF02987139 Crossref, ISI, Google ScholarYe, W., et al. 2015. Plant Dis. 99:291. https://doi.org/10.1094/PDIS-08-14-0830-PDN Link, ISI, Google ScholarDetailsFiguresLiterature CitedRelated Vol. 100, No. 5 May 2016SubscribeISSN:0191-2917e-ISSN:1943-7692 Metrics Article History Issue Date: 15 Apr 2016Published: 25 Feb 2016First Look: 15 Dec 2015Accepted: 4 Dec 2015 Pages: 1022-1022 Information© 2016 The American Phytopathological SocietyCited byPratylenchus (root lesion nematode)CABI Compendium, Vol. CABI CompendiumDiseases Caused by Nematodes on the Sugar Beet22 August 2022Occurrence of plant-parasitic nematodes in sugarbeet fields of North Dakota and MinnesotaCrop Protection, Vol. 142Developing a One-Step Multiplex PCR Assay for Rapid Detection of Four Stubby-Root Nematode Species, Paratrichodorus allius, P. minor, P. porosus, and Trichodorus obtususDanqiong Huang, Guiping Yan, Neil Gudmestad, Weimin Ye, Jonathan Whitworth, Kenneth Frost, William Crow, and Abolfazl Hajihassani31 December 2018 | Plant Disease, Vol. 103, No. 3Molecular Characterization and Identification of Stubby Root Nematode Species From Multiple States in the United StatesDanqiong Huang, Guiping Yan, Neil Gudmestad, Jonathan Whitworth, Kenneth Frost, Charles Brown, Weimin Ye, Paula Agudelo, and William Crow31 August 2018 | Plant Disease, Vol. 102, No. 11Biology, Ecology and Management of Plant Parasitic Nematodes in Minnesota18 December 2018Development of Real-Time and Conventional PCR Assays for Identifying Stubby Root Nematode Paratrichodorus alliusDanqiong Huang, Guiping Yan, and Andrea M. Skantar20 March 2017 | Plant Disease, Vol. 101, No. 6Specific Detection of the Root-Lesion Nematode Pratylenchus scribneri Using Conventional and Real-Time PCRDanqiong Huang and Guiping Yan30 November 2016 | Plant Disease, Vol. 101, No. 2" @default.
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