Plant Parasitic and Virus Vector Nematodes Associated

Total Page:16

File Type:pdf, Size:1020Kb

Plant Parasitic and Virus Vector Nematodes Associated 866 SHORT COMMUNICATIONS Pakistan, Economic trade and investment wing, Pakistan J. Zool., vol. 46(3), pp. 866-870, 2014. Islamabad, pp. 23. Chhabra, K.S. and Kooner, B.S., 1991. Lugume Res., 14: 175- Plant Parasitic and Virus Vector 184. Chhabra, K.S. and Kooner, B.S., 1993. Pest Manag. Econ. Nematodes Associated with Vineyards Zool., 6: 215-218. in the Central Anatolia Region of Chhabra, K.S. and Kooner, B.S., 1994. Pest Manag. Econ. # Zool., 2; 11-14. Turkey Fargali, M.A., Ali, A.G. and Hussein, H.A., 1996. Assiut J. 1 2 agric. Sci., 27: 125-134. İlker Kepenekci, * Halil Toktay and Emre Evlice 3 Hafeez, F.Y., Aslam, Z. and Malik, K.A., 1988. Plant and Soil, 1 106: 3-8. Department of Plant Protection, Faculty of Khattak, M.K., Ali, S. and Chishti, J.I., 2004. Pak. Ent., 26: 9- Agriculture, Gaziosmanpaşa University, 60250 12. Tokat, Turkey 2 Lal, S.S., 1985. Trop. Pest Manag., 31: 105-114. Department of Plant Production and Technologies, Naqvi, S.H., Talpur, M.A., Rustamani, M.A., Khan, M.M. and Niğde University, Faculty of Agricultural Sciences Hussain, T., 1995. Proc. Pakistan Congr. Zool., 15: and Technologies, 51240 Niğde, Turkey 247-251. 3Department of Entomology, Plant Protection Nazir, M.S., 1994. Crop Production. NBF, Islarnabad, pp. 51. Central Research Institute, 06172 Ankara, Turkey Sahoo, B.K. and Hota, A.K., 1991. Madras agric. J., 78: 84-86. Shafique, M., Nadeem, S., Hamed, M., Atta, B.M. and Shah, Abstract.- Grapevines is host for many T.M., 2009. Pakistan J. Zool., 41: 277-280. plant parasitic nematode species and virus Steel, R.G.D., Torrie, J.H. and Dickey, D.A., 1997. Principles transmission species. Surveys were undertaken and procedures of statistics. A biometrical approach. in 15 vineyards in Turkey. Samples were taken 3rd ed. McGraw Hill Inc., New York. from each vineyard older than 10 years, from depth of 0-30 cm and 30-60 cm. Totally 300 (Received 20 February 2014, revised 20 March 2014) subsamples were examined. In this study, 22 species were identified belonging to 16 genus within Tylenchida, Aphelenchida, Dorylaimida and Triplonchida orders from soil and root samples of vine (Vitis vinifera L.) in the Central Anatolia Region (Nevşehir, Karaman, Konya, Isparta and Burdur provinces). Malenchus fusiformis, Aphelenchoides clarus, A. confusus, Rotylenchus (R.) colbrani, Xiphinema diversicaudatum and Trichodorus similis were found for the first time in Turkey. The species most frequently encountered were X. pachtaicum and Helicotylenchus crenacauda. Key words: Plant parasitic nematodes, virus vector nematodes, vineyards. Grapevine (Vitis vinifera) is one of the most extensive fruit crop grown worldwide. Approximately 7,086,022 hectares of grapevine are grown in the worldwide and Turkey where takes the ________________________________ # This study was presented in the 28th International Symposium of the European Society of Nematologists. * Corresponding author: [email protected] SHORT COMMUNICATIONS 867 5th order for grapevine growing areas in the world (1969), in another study on different populations of covers 472,545 hectares mainly in Aegean, X. americanum, the analyses were performed in the Southeast Anatolia and Central Anatolia region populations available in Adapazarı, Söke, Amasya (Anonymous, 2013) and Gaziantep, some cities of Turkey. Some Crop losses caused by plant parasitic researchers stressed out the fact that the species nematodes are increasing in Turkey, but the defined as X. americanum and detected in some economic significance of the damage caused by Mediterranean countries should be a separate these parasites is not well-understood or recognised species (Dalmasso and Younes, 1970; Coomans and by growers. Basic information about plant parasitic Loof, 1969). Lamberti and Martelli (1971) claimed nematodes, their host associations, and occurrence that this species should be X. mediterraneum. It is in different localities in Turkey was recently claimed that this species was the same as the one reviewed by Kepenekci (2012), who listed 240 previously detected in the surveys on Aegean and nematode species associated from different Marmara and defined as X. americanum and great localities in the country. possibly this species was X. mediterraneum (Arınç, Grapevines are hosts for many nematode 1982). It is apparent that different and similar species. The most serious direct damage is caused nematode was confused by another nematode by Meloidogyne, Xiphinema and Pratylenchus spp belonging to X. americanum of which presence is (Brown et al., 1993). Less important species are still not known in Turkey and Europe. The presence Criconemoides, Paratylenchus, Helicotylenchus, of this species is not known in our country Rotylenchus, Longidorus, Paralongidorus and (Kepenekci, 2012). Trichodorus in the world grapevine areas (Boubals The first study held on nematode-virus and Dalmasso, 1964; Raski and Krusberg, 1984; relations in Turkey carried out by Arınç (1982) was Tacconi and Mancini, 1987; Raski, 1988). One of associated with “Aegean Region vineyard sites in the most serious problem is grapevine fanleaf Xiphinema species (Nematoda: Longidoridae), as nepovirus, transmitted by Xiphinema index. This well as their separation, hosts and damages". In this problem is covered in the section on nematode research, the studies were performed between 1971- transmitted viruses. However, little information is 1974 in order for detecting the Xiphinema species available on the plant parasitic nematodes associated associated with nematodes in Aegean Region with grapevine in Turkey and no information is including İzmir, Manisa, Balıkesir, Çanakkale, available for Central Anotolia. Aydın, Denizli, Muğla and Uşak cities. According Studies associated with Xiphinema species to the results of the study, X. turcicum, X. were carried out in Turkey (Ertürk and Özkut, 1974; mediterraneum, X. index, X. italiae, X. brevicolle, X. Arınç, 1982; Elekçioğlu, 1992) while studies related ingens and X. pyrenaicum were detected. In addition to other virus vector nematodes i.e. Longidorus, to morphological and morphometric properties, Paratrichodorus and Trichodorus species were very synonyms, variations detected, the separation in few (Öztürk and Enneli, 1994). The Longidorus, research area, and in literature as well as habitats are Paratrichodorus and Trichodorus species are the demonstrated. Of this X. index and X. italiae species substantial virus vector nematodes as they carry are virus vector nematodes. These two viruses are viral diseases. available in the vineyards of our country where The first detection of virus vector nematodes Grapevine fanleaf nepovirus are also available. in Turkey was initiated with detection of X. index Grapevines are hosts for many plant parasitic and Longidorus sp. of vine short virus (Kaşkaloğlu nematode species and some of the species can and Türkmenoğlu, 1965; Kaşkaloğlu, 1965). In transmit viruses. In this study, virus vector another study, X. index and X. americanum were nematode species of Dorylaimida in grapevines detected to be dominant in Izmir vineyard (Yüksel, growing areas of The Central Anatolia of Turkey 1966). In our country, X. mediterraneum was firstly were examined considering their two main aspects, detected in the grapevine sites by Arınç (1982). namely faunistic and taxonomic. According to the statement of the analyst, Tarjan 868 SHORT COMMUNICATIONS Fig. 1. Map of Turkey showing sampling sites in the Central Anatolia Region. Material and methods Aphelenchida, Dorylaimida and Triplonchida. Most Soil samples and grapevine roots were of them are new records for vineyards in Turkey. collected from vineyards of five provinces in the Malenchus fusiformis (Thorne and Malek); Central Anatolia Region during July and August Aphelenchoides clarus Thorne and Malek, A. 2004-2005. Fifteen vineyards, older than ten years, confusus Thorne and Malek, Rotylenchus (R.) from Nevşehir, Karaman, Konya, Burdur and colbrani Brzeski and Choi; Xiphinema Isparta provinces were sampled (Fig. 1). Soil diversicaudatum (Micoletzky) and Trichodorus samples were collected with a spade or a 70 mm similis Seinhorst were found for the first time in the auger (800-1500 cm3) from depths of 0-30 cm and nematofauna of Turkey. The species most 30-60 cm. Ten subsamples were taken from each frequently encountered were X. diversicaudatum vineyard and each depth. Totally 300 subsamples and Helicotylenchus crenacauda (Table I). were collected. Root samples were collected from Root-knot nematodes occurring in vineyards ten vine plants in each vineyard (approximately 50 in some provinces of Turkey (Ertürk and Özkut, gram of roots for each sample). 1974; Lamberti et al., 1994) were not found in the In laboratory studies, sieve and funnel present survey. X. index, the most important methods were used to obtaining active nematodes nematode species in vineyards was not also found in from soil (Hooper, 1986a). Incubation method was the present survey. used to extract the nematodes from plant roots A preliminary experiment was undertaken to (Young, 1954). For identification, nematodes were evaluate the changes in nematode levels by soil fixed according to De Grisse (1969). The slides depth. Soil samples from 15 vineyards of five were prepared by the paraffin ring method (Hooper, different provinces were taken at depths 0-30 cm 1986b). Taxonomic status was given according to and 30-60 cm. Paratylenchus (P.) variabilis, Hunt (1993) and Siddiqi (2000). Filenchus filiformis, Safianema lutonense, Rotylenchus (R.) colbrani, Ditylenchus
Recommended publications
  • Phylogeography of the Soil-Borne Vector Nematode
    Phylogeography of the soil-borne vector nematode Xiphinema index highly suggests Eastern origin and dissemination with domesticated grapevine van Chung Nguyen, Laure Villate, Carlos Gutierrez-Gutierrez, Pablo Castillo, Cyril van Ghelder, Olivier Plantard, Daniel Esmenjaud To cite this version: van Chung Nguyen, Laure Villate, Carlos Gutierrez-Gutierrez, Pablo Castillo, Cyril van Ghelder, et al.. Phylogeography of the soil-borne vector nematode Xiphinema index highly suggests Eastern origin and dissemination with domesticated grapevine. Scientific Reports, Nature Publishing Group, 2019, 9 (1), pp.1-11. 10.1038/s41598-019-43812-4. hal-02629151 HAL Id: hal-02629151 https://hal.inrae.fr/hal-02629151 Submitted on 27 May 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Distributed under a Creative Commons Attribution| 4.0 International License www.nature.com/scientificreports OPEN Phylogeography of the soil-borne vector nematode Xiphinema index highly suggests Eastern origin and Received: 27 June 2018 Accepted: 27 April 2019 dissemination with domesticated Published: xx xx xxxx grapevine Van Chung Nguyen1,6, Laure Villate2, Carlos Gutierrez-Gutierrez 3, Pablo Castillo 4, Cyril Van Ghelder1, Olivier Plantard5 & Daniel Esmenjaud1 The soil-borne nematode Xiphinema index is closely linked to its main host, the grapevine, and presents a major threat to vineyards worldwide due to its ability to transmit Grapevine fanleaf virus (GFLV).
    [Show full text]
  • Phylogenetic Analysis of Nematodes of the Genus Pratylenchus Using Nuclear 26S Rdna
    University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Faculty Publications from the Harold W. Manter Laboratory of Parasitology Parasitology, Harold W. Manter Laboratory of February 1997 Phylogenetic Analysis of Nematodes of the Genus Pratylenchus Using Nuclear 26S rDNA Luma Al-Banna University of Jordan, [email protected] Valerie M. Williamson University of California, Davis, [email protected] Scott Lyell Gardner University of Nebraska - Lincoln, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/parasitologyfacpubs Part of the Parasitology Commons Al-Banna, Luma; Williamson, Valerie M.; and Gardner, Scott Lyell, "Phylogenetic Analysis of Nematodes of the Genus Pratylenchus Using Nuclear 26S rDNA" (1997). Faculty Publications from the Harold W. Manter Laboratory of Parasitology. 52. https://digitalcommons.unl.edu/parasitologyfacpubs/52 This Article is brought to you for free and open access by the Parasitology, Harold W. Manter Laboratory of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Faculty Publications from the Harold W. Manter Laboratory of Parasitology by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Published in Molecular Phylogenetics and Evolution (ISSN: 1055-7903), vol. 7, no. 1 (February 1997): 94-102. Article no. FY960381. Copyright 1997, Academic Press. Used by permission. Phylogenetic Analysis of Nematodes of the Genus Pratylenchus Using Nuclear 26S rDNA Luma Al-Banna*, Valerie Williamson*, and Scott Lyell Gardner1 *Department of Nematology, University of California at Davis, Davis, California 95676-8668 1H. W. Manter Laboratory, Division of Parasitology, University of Nebraska State Museum, W-529 Nebraska Hall, University of Nebraska-Lincoln, Lincoln, NE 68588-0514; [email protected] Fax: (402) 472-8949.
    [Show full text]
  • Pratylenchus
    Pratylenchus Taxonomy Class Secernentea Order Tylenchida Superfamily Tylenchoidea Family Pratylenchidae Genus Pratylenchus The genus name is derived from the words pratum (Latin= meadow), tylos (Greek= knob) and enchos ( Greek=spear). Originally described as Tylenchus pratensis by De Man in 1880 from a meadow in England. Pratylenchus scribneri was reported from potato in Tennessee in 1889. Root-lesion nematodes of the genus Pratylenchus are recognised worldwide as major constraints of important economic crops, including banana, cereals, coffee, corn, legumes, peanut, potato and many fruits. Their economic importance in agriculture is due to their wide host range and their distribution in every terrestrial environment on the planet (Castillo and Vovlas, 2007). Plant‐parasitic nematodes of the genus Pratylenchus are among the top three most significant nematode pests of crop and horticultural plants worldwide. There are more than 70 described species, most are polyphagous with a wide range of host plants. Because they do not form obvious feeding patterns characteristic of sedentary endoparasites (e.g. galls or cysts), and all worm‐like stages are mobile and can enter and leave host roots, it is more difficult to recognise their presence and the damage they cause. Morphology There are more than 70 described species, fewer than half of them are known to have males. Morphological identification of Pratylenchus species is difficult, requiring considerable subjective evaluation of characters and overlapping morphomertrics. Nematodes in this genus are 0.4-0.5 mm long (under 0.8 mm). No sexual dimorphism in the anterior part of the body. Deirids absent. Lip area low, flattened anteriorly, not offset, or only weakly offset, from body contour.
    [Show full text]
  • Detection of Multiple Variants of Grapevine
    Detection of Multiple Variants of Grapevine Fanleaf Virus in Single Xiphinema index Nematodes Shahinez Garcia, Jean-Michel Hily, Veronique Komar, Claude Gertz, Gerard Demangeat, Olivier Lemaire, Emmanuelle Vigne To cite this version: Shahinez Garcia, Jean-Michel Hily, Veronique Komar, Claude Gertz, Gerard Demangeat, et al.. Detec- tion of Multiple Variants of Grapevine Fanleaf Virus in Single Xiphinema index Nematodes. Viruses, MDPI, 2019, 11 (12), pp.1139. 10.3390/v11121139. hal-03017540 HAL Id: hal-03017540 https://hal.archives-ouvertes.fr/hal-03017540 Submitted on 20 Nov 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. viruses Article Detection of Multiple Variants of Grapevine Fanleaf Virus in Single Xiphinema index Nematodes 1, 1,2, 1 1 Shahinez Garcia y, Jean-Michel Hily y ,Véronique Komar , Claude Gertz , Gérard Demangeat 1, Olivier Lemaire 1 and Emmanuelle Vigne 1,* 1 Unité Mixte de Recherche (UMR) Santé de la Vigne et Qualité du Vin, Institut National de la Recherche Agronomique (INRA)-Université de Strasbourg, BP 20507, 68021 Colmar Cedex, France; [email protected] (S.G.); [email protected] (J.-M.H.); [email protected] (V.K.); [email protected] (C.G.); [email protected] (G.D.); [email protected] (O.L.) 2 Institut Français de la Vigne et du Vin (IFV), 30240 Le Grau-Du-Roi, France * Correspondence: [email protected]; Tel.: +33-389-224-955 These authors contributed equally to the work.
    [Show full text]
  • Phylogenetic and Population Genetic Studies on Some Insect and Plant Associated Nematodes
    PHYLOGENETIC AND POPULATION GENETIC STUDIES ON SOME INSECT AND PLANT ASSOCIATED NEMATODES DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University By Amr T. M. Saeb, M.S. * * * * * The Ohio State University 2006 Dissertation Committee: Professor Parwinder S. Grewal, Adviser Professor Sally A. Miller Professor Sophien Kamoun Professor Michael A. Ellis Approved by Adviser Plant Pathology Graduate Program Abstract: Throughout the evolutionary time, nine families of nematodes have been found to have close associations with insects. These nematodes either have a passive relationship with their insect hosts and use it as a vector to reach their primary hosts or they attack and invade their insect partners then kill, sterilize or alter their development. In this work I used the internal transcribed spacer 1 of ribosomal DNA (ITS1-rDNA) and the mitochondrial genes cytochrome oxidase subunit I (cox1) and NADH dehydrogenase subunit 4 (nd4) genes to investigate genetic diversity and phylogeny of six species of the entomopathogenic nematode Heterorhabditis. Generally, cox1 sequences showed higher levels of genetic variation, larger number of phylogenetically informative characters, more variable sites and more reliable parsimony trees compared to ITS1-rDNA and nd4. The ITS1-rDNA phylogenetic trees suggested the division of the unknown isolates into two major phylogenetic groups: the HP88 group and the Oswego group. All cox1 based phylogenetic trees agreed for the division of unknown isolates into three phylogenetic groups: KMD10 and GPS5 and the HP88 group containing the remaining 11 isolates. KMD10, GPS5 represent potentially new taxa. The cox1 analysis also suggested that HP88 is divided into two subgroups: the GPS11 group and the Oswego subgroup.
    [Show full text]
  • Genus Pratylenchus Filipjev: Multientry and Monoentry Keys and Diagnostic Relationships (Nematoda: Tylenchida: Pratylenchidae)
    © Zoological Institute, St.Petersburg, 2002 Genus Pratylenchus Filipjev: multientry and monoentry keys and diagnostic relationships (Nematoda: Tylenchida: Pratylenchidae) A.Y. Ryss Ryss, A.Y. 2002. Genus Pratylenchus Filipjev: multientry and monoentry keys and diag- nostic relationships (Nematoda: Tylenchida: Pratylenchidae). Zoosystematica Rossica, 10(2), 2001: 241-255. Tabular (multientry) key to Pratylenchus is presented, and functioning of the computer- ized multientry image-operating key developed on the basis of the stepwise computer diagnostic system BIKEY-PICKEY is described. Monoentry key to Pratylenchus is given, and diagnostic relationships are analysed with the routine taxonomic methods as well as with the use of BIKEY diagnostic system and by the cluster tree analysis using STATISTICA program package. The synonymy Pratylenchus scribneri Steiner in Sherbakoff & Stanley, 1943 = P. jordanensis Hashim, 1983, syn. n. is established. Con- clusion on the transition from amphimixis to parthenogenesis as one of the leading evolu- tionary factors for Pratylenchus is drawn. A.Y. Ryss, Zoological Institute, Russian Academy of Sciences, Universitetskaya nab. 1, St.Petersburg 199034, Russia. Identification of nematode species is difficult diagnostic system, and by the cluster tree analy- because of relative poverty and significant sis using STATISTICA program package intraspecific variability of diagnostic characters. (STATISTICA, 1995). The genus Pratylenchus Filipjev is an example of a group with large number of species (49 valid Material and the basic information sources species, more than 100 original descriptions) and complicated diagnostics. The genus has a world- The collections of the following institutions wide distribution and economic importance as were used in research: Zoological Institute, Rus- its species are the dangerous parasites of agri- sian Academy of Sciences; Institute for Nema- cultural crops.
    [Show full text]
  • Molecular Characterization of the Pratylenchus Vulnus Populations on Cereals in Turkey
    JOURNAL OF NEMATOLOGY Article | DOI: 10.21307/jofnem-2020-084 e2020-84 | Vol. 52 Molecular characterization of the Pratylenchus vulnus populations on cereals in Turkey Mehmet Sait Karaca1, Elif Yavuzaslanoglu2,*, Gul Imriz3 and Ozlem Ates Sonmezoglu4,* Abstract 1Department of Plant Protection, Pratylenchus vulnus (walnut root lesion nematode) is one of the most Ministry of Agriculture and Forestry, damaging root lesion nematode species worldwide. In this study, 17 International Bahri Dagdas populations of P. v u l n u s obtained from wheat and barley cultivated Agricultural Research Institute, fields in 2016 to 2017 in Turkey (Karaman and Konya provinces) Konya, Turkey. were identified using real-time PCR and melting curve analysis. Samples provided a single peak at 87.3˚C with real-time PCR. D2 2Department of Plant and Animal to D3 expansion segments of the 28S rRNA of one population from Production, Vocational School, Cihanbeyli district in Konya province was sequenced and recorded Karamanoglu Mehmetbey in GenBank (Accession number: MT320536.1). Alignments of the University, Karaman, Turkey. population was identical 98.66% to the populations of P. vulnus 3Department of Plant Protection, available in GenBank (Accs. nos: LT985479.1 and LT965052.1) and Dicle University, Faculty of 98.65% (Accs. nos: KY424305.1 and KY424304.1). Agriculture, Diyarbakir, Turkey. 4Department of Bioengineering, Keywords Faculty of Engineering, Barley, D2-D3 expansion region of 28S rRNA, Detection, Real-time Karamanoglu Mehmetbey PCR, Sequencing, Walnut root lesion nematode, Wheat. University, Karaman, Turkey. *E-mails: [email protected]. tr; [email protected] This paper was edited by Zafar Ahmad Handoo. Received for publication September 18, 2019.
    [Show full text]
  • JOURNAL of NEMATOLOGY a COI DNA Barcoding Survey of Pratylenchus Species in the Great Plains Region of North America
    JOURNAL OF NEMATOLOGY Article | DOI: 10.21307/jofnem-2019-081 e2019-81 | Vol. 51 A COI DNA barcoding survey of Pratylenchus species in the Great Plains Region of North America Mehmet Ozbayrak,1 Tim Todd,2 Timothy Harris,1 Rebecca Higgins,1 Kirsten Powers,1 Peter Mullin,1 Abstract 1 1 Lisa Sutton and Thomas Powers * Pratylenchus species are among the most common plant parasitic 1Department of Plant Pathology, nematodes in the Great Plains Region of North America. Our goal University of Nebraska-Lincoln, was to survey Pratylenchus species diversity across the Great Plains Lincoln, NE, 68583-0722. region using a mitochondrial COI DNA barcode. The objectives were to (i) determine species boundaries of the common Pratylen- 2 Department of Plant Pathology, chus species within the region, (ii) assess the host associations of Kansas State University, the barcoded Pratylenchus specimens, and (iii) determine Pratylen- Manhattan, KS, 66502. chus distribution patterns throughout the region. A total of 860 soil *E-mail: [email protected] samples, primarily associated with eight major crops, were collect- ed from Colorado, Kansas, Montana, Nebraska, North Dakota, and This paper was edited by Wyoming. From this total, 246 soil samples provided the majority of Erik J. Ragsdale. 915 individual nematode specimens that were amplified by PCR and Received for publication May 24, sequenced for a 727 to 739 bp region of COI. Maximum likelihood, 2019. neighbor-joining, and Bayesian phylogenetic trees all recognized 19 distinct and well-supported haplotype groups. The most common and widespread haplotype group, representing 53% of all specimens was P. neglectus, detected from 178 fields in 100 counties and as- sociated with fields growing wheat, corn, dry beans, barley, alfalfa, sugar beets, potatoes, and a vineyard.
    [Show full text]
  • Xiphinema Index and Its Relationship to Grapevines: a Review
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Stellenbosch University: SUNJournals Xiphinema index and its Relationship to Grapevines: A review S. van Zyl1,3,4, M.A. Vivier1,2, M.A. Walker3* (1) Department of Viticulture and Enology, Stellenbosch University, Private Bag X1, Matieland (Stellenbosch), South Africa (2) Institute for Wine Biotechnology, Stellenbosch University, Private Bag X1, Matieland (Stellenbosch), South Africa (3) Department of Viticulture and Enology, University of California, 595 Hilgard Lane, Davis, CA, 95616, USA (4) Current address: Department of Viticulture and Enology, California State University, 2360 East Barstow Avenue, Fresno, CA, 93740, USA Submitted for publication: September 2011 Accepted for publication: October 2011 Key words: Xiphinema index, resistance, Grapevine fanleaf virus, DNA markers, rootstocks The dagger nematode, Xiphinema index, is considered a major pest in grape growing countries. Xiphinema index is especially important because of its ability to transmit Grapevine fanleaf virus when feeding on grapevine roots. This paper provides a comprehensive and updated review of the classification, genetics and biology of Xiphinema index, and its relationship with grapevine fanleaf virus. Current control measures, as well as past and present efforts to breed resistant grapevine rootstocks, are presented. Grapevines are cultivated in temperate and Mediterranean X. italiae Meyl (Loubser & Meyer, 1987a); the first three are climates around the world. Grapevines have been moved common in South African vineyards (Malan, 1995). They are between countries and continents, following human found in a variety of soils and are migratory ectoparasites migration and settlement, and have been imported and (Shurtleff & Averre III, 2000).
    [Show full text]
  • Biology and Molecular Characterisation of the Root Lesion Nematode, Pratylenchus Curvicauda
    Biology and Molecular Characterisation of the Root Lesion Nematode, Pratylenchus curvicauda This thesis is presented by FARHANA BEGUM For the degree of Doctor of Philosophy School of Veterinary and Life Sciences, WA State Agricultural Biotechnology Centre (SABC), Murdoch University, Perth, Western Australia July 2017 Declaration I declare that this is my own account of my research and contains as its main content, work which has not previously been submitted for a degree at any tertiary educational institution. FARHANA BEGUM ii Abstract Australia is the driest inhabited continent with about 70% of the land arid or semi- arid, and soils which are geologically old, weathered, and many are infertile. This is a challenging environment for agricultural production, which is further impacted by biotic constraints such as root lesion nematodes (RLNs), Pratylenchus spp. These soil-borne nematodes cause significant economic losses in yields of winter cereals, and in other crops, particularly under conditions of moisture and nutrient stress. RLNs are widely distributed in Australian broadacre cropping soils, and losses in cereal production are greater when more than one RLN species is present, a situation which often occurs in Western Australia (WA). Hence, to develop appropriate management regimes, accurate identification of RLN species is needed, combined with understanding the biology of host-nematode interactions. The initial aim of this research was to extend the molecular and biological characterisation of P. quasitereoides, a recently described species of root lesion nematode from WA. Morphological measurements of two important characters, tail shape and the per cent distance of the vulva from the anterior end of the nematode body, were made from nematodes collected from the four locations of WA.
    [Show full text]
  • (PRA) For: Pratylenchus Scribneri December 2015 Summary and Conclusions of the Rapid
    Rapid Pest Risk Analysis (PRA) for: Pratylenchus scribneri December 2015 Summary and conclusions of the rapid PRA Pratylenchus scribneri, a root-lesion nematode with a broad host range, is not known to be present in the PRA area but has been intercepted in 2000, several times in 2005 and again in 2015. The recent UK Risk Register entry concluded that a rapid PRA would be useful to help decide, whether continued statutory action against future occurrences of the nematode is justified. In the PRA area, unfavourable climatic conditions make it very unlikely that P. scribneri could establish outdoors as a field pest. The nematode poses risks to plants grown under protection when high temperatures are maintained over a sufficiently long period to allow the nematode to reproduce. However, these risks are dependent on the characteristics of specific production systems and consequently are difficult to assess. This rapid PRA shows: Risk of entry Nematode damage can be non-specific and P. scribneri could enter undetected in soil and roots of plants for planting or with bulbs and tubers. Ornamental plants imported from regions where the nematode is present represent a significant entry pathway. Entry risks from this pathway are rated as ‘likely’. Bulbs and tubers are rated as moderately likely. 1 Risk of establishment In field plants grown in the absence of protection, establishment in the PRA area is rated as ‘very unlikely’. The absence of high summer temperatures in the PRA area for a sufficiently long period to allow reproduction limits the potential for establishment. The nematode has been reported in field crops only from countries that have hotter summers than the UK.
    [Show full text]
  • Plant-Parasitic Nematodes in Germany – an Annotated Checklist
    86 (3) · December 2014 pp. 177–198 Plant-parasitic nematodes in Germany – an annotated checklist Dieter Sturhan Arnethstr. 13D, 48159 Münster, Germany, and c/o Julius Kühn-Institut, Toppheideweg 88, 48161 Münster, Germany E-mail: [email protected] Received 15 September 2014 | Accepted 28 October 2014 Published online at www.soil-organisms.de 1 December 2014 | Printed version 15 December 2014 Abstract A total of 268 phytonematode species indigenous in Germany or more recently introduced and established outdoors are listed. Their current taxonomic status and classification is given, which is not always in agreement with that applied in Fauna Europaea or recent publications. Recently used synonyms are included and comments on the species status are sometimes added. Species originally described from Germany are particularly marked, presence of types and other voucher specimens in the German Nematode Collection - Terrestrial Nematodes (DNST) is indicated; likewise potential occurrence or absence of species in field soil and similar cultivated land is noted. Species known from indoor plants and only occasionally observed outdoors are listed separately. Synonymies and species considered as species inquirendae are listed in case records refer to Germany; records and identifications considered as doubtful are also listed. In a separate section notes on a number of genera and species are added, taxonomic problems are indicated, and data on morphology, distribution and habitat of some recently discovered species and of still unidentified or undescribed species or populations are given. Longidorus macroteromucronatus is synonymised with L. poessneckensis. Paratrophurus striatus is transferred as T. casigo nom. nov., comb. nov. to the genus Tylenchorhynchus. Neotypes of Merlinius bavaricus and Bursaphelenchus fraudulentus are designated.
    [Show full text]