Numerical Taxonomy Helps Identification of Merliniidae
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Description and Identification of Four Species of Plant-Parasitic Nematodes Associated with Forage Legumes
5 Egypt. J. Agronematol., Vol. 17, No.1, PP. 51-64 (2018) Description and Identification of Four Species of Plant-parasitic Nematodes Associated with Forage Legumes * * Mahfouz M. M. Abd-Elgawad ; Mohamed F.M. Eissa ; Abd-Elmoneim Y. ** *** **** El-Gindi ; Grover C. Smart ; and Ahmed El-bahrawy . * Plant Pathology Department, National Research Centre. ** Department of Agricultural Zoology and Nematology, Faculty of Agriculture, University of Cairo, Giza, Egypt. *** Department of Entomology and Nematology, IFAS, University of Florida, USA. **** Institute for Sustainable Plant Protection, National Council of Research, Bari, Italy. Abstract Four species of plant parasitic nematodes were present in soil samples planted with forage legumes at Alachua County, Florida, USA. The detected species Belonolaimus longicaudatus, Criconemella ornate, Hoplolaimus galeatus, and Paratrichodorus minor were described in the present study. They belong to orders Rhabditida (Belonolaimus longicaudatus, Criconemella ornate, and Hoplolaimus galeatus) and Triplonchida (Paratrichodorus minor) and to taxonomical families Dolichodoridae (Belonolaimus longicaudatus), Hoplolaimidae (Hoplolaimus galeatus) Criconematidae (Criconemella ornate), and Trichodoridae (Paratrichodorus minor). The identification of the present specimens was based on the classical taxonomy, following morphological and morphometrical characters in the species specific identification keys. Keywords: Belonolaimus longicaudatus, Criconemella ornate, Hoplolaimus galeatus, Paratrichodorus minor, morphology, -
TIMING of NEMATICIDE APPLICATIONS for CONTROL of Belenolaimus Longicaudatus on GOLF COURSE FAIRWAYS
TIMING OF NEMATICIDE APPLICATIONS FOR CONTROL OF Belenolaimus longicaudatus ON GOLF COURSE FAIRWAYS By PAURIC C. MC GROARY A THESIS PRESENTED TO THE GRADUATE SCHOOL OF THE UNIVERSITY OF FLORIDA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE UNIVERSITY OF FLORIDA 2007 1 © 2007 Pauric C. Mc Groary 2 ACKNOWLEDGMENTS I would like to thank Dr. William Crow for his scientific expertise, persistence, and support. I am also indebted to my other committee supervisors members, Dr. Robert McSorley and Dr. Robin Giblin-Davis, who were always available to answer questions and to provide guidance throughout. 3 TABLE OF CONTENTS page ACKNOWLEDGMENTS ...............................................................................................................3 LIST OF TABLES...........................................................................................................................6 LIST OF FIGURES .........................................................................................................................7 ABSTRACT.....................................................................................................................................8 CHAPTER 1 INTRODUCTION AND LITERATURE REVIEW ..............................................................10 Introduction.............................................................................................................................10 Belonolaimus longicaudatus...................................................................................................11 -
Population Variability of Rotylenchulus Reniformis in Cotton Agroecosystems Megan Leach Clemson University, [email protected]
Clemson University TigerPrints All Dissertations Dissertations 12-2010 Population Variability of Rotylenchulus reniformis in Cotton Agroecosystems Megan Leach Clemson University, [email protected] Follow this and additional works at: https://tigerprints.clemson.edu/all_dissertations Part of the Plant Pathology Commons Recommended Citation Leach, Megan, "Population Variability of Rotylenchulus reniformis in Cotton Agroecosystems" (2010). All Dissertations. 669. https://tigerprints.clemson.edu/all_dissertations/669 This Dissertation is brought to you for free and open access by the Dissertations at TigerPrints. It has been accepted for inclusion in All Dissertations by an authorized administrator of TigerPrints. For more information, please contact [email protected]. POPULATION VARIABILITY OF ROTYLENCHULUS RENIFORMIS IN COTTON AGROECOSYSTEMS A Dissertation Presented to the Graduate School of Clemson University In Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy Plant and Environmental Sciences by Megan Marie Leach December 2010 Accepted by: Dr. Paula Agudelo, Committee Chair Dr. Halina Knap Dr. John Mueller Dr. Amy Lawton-Rauh Dr. Emerson Shipe i ABSTRACT Rotylenchulus reniformis, reniform nematode, is a highly variable species and an economically important pest in many cotton fields across the southeast. Rotation to resistant or poor host crops is a prescribed method for management of reniform nematode. An increase in the incidence and prevalence of the nematode in the United States has been reported over the -
Occurrence of Ditylenchus Destructorthorne, 1945 on a Sand
Journal of Plant Protection Research ISSN 1427-4345 ORIGINAL ARTICLE Occurrence of Ditylenchus destructor Thorne, 1945 on a sand dune of the Baltic Sea Renata Dobosz1*, Katarzyna Rybarczyk-Mydłowska2, Grażyna Winiszewska2 1 Entomology and Animal Pests, Institute of Plant Protection – National Research Institute, Poznan, Poland 2 Nematological Diagnostic and Training Centre, Museum and Institute of Zoology Polish Academy of Sciences, Warsaw, Poland Vol. 60, No. 1: 31–40, 2020 Abstract DOI: 10.24425/jppr.2020.132206 Ditylenchus destructor is a serious pest of numerous economically important plants world- wide. The population of this nematode species was isolated from the root zone of Ammo- Received: July 11, 2019 phila arenaria on a Baltic Sea sand dune. This population’s morphological and morphomet- Accepted: September 27, 2019 rical characteristics corresponded to D. destructor data provided so far, except for the stylet knobs’ height (2.1–2.9 vs 1.3–1.8) and their arrangement (laterally vs slightly posteriorly *Corresponding address: sloping), the length of a hyaline part on the tail end (0.8–1.8 vs 1–2.9), the pharyngeal gland [email protected] arrangement in relation to the intestine (dorsal or ventral vs dorsal, ventral or lateral) and the appearance of vulval lips (smooth vs annulated). Ribosomal DNA sequence analysis confirmed the identity of D. destructor from a coastal dune. Keywords: Ammophila arenaria, internal transcribed spacer (ITS), potato rot nematode, 18S, 28S rDNA Introduction Nematodes from the genus Ditylenchus Filipjev, 1936, arachis Zhang et al., 2014, both of which are pests of are found in soil, in the root zone of arable and wild- peanut (Arachis hypogaea L.), Ditylenchus destruc- -growing plants, and occasionally in the tissues of un- tor Thorne, 1945 which feeds on potato (Solanum tu- derground or aboveground parts (Brzeski 1998). -
The Complete Mitochondrial Genome of the Columbia Lance Nematode
Ma et al. Parasites Vectors (2020) 13:321 https://doi.org/10.1186/s13071-020-04187-y Parasites & Vectors RESEARCH Open Access The complete mitochondrial genome of the Columbia lance nematode, Hoplolaimus columbus, a major agricultural pathogen in North America Xinyuan Ma1, Paula Agudelo1, Vincent P. Richards2 and J. Antonio Baeza2,3,4* Abstract Background: The plant-parasitic nematode Hoplolaimus columbus is a pathogen that uses a wide range of hosts and causes substantial yield loss in agricultural felds in North America. This study describes, for the frst time, the complete mitochondrial genome of H. columbus from South Carolina, USA. Methods: The mitogenome of H. columbus was assembled from Illumina 300 bp pair-end reads. It was annotated and compared to other published mitogenomes of plant-parasitic nematodes in the superfamily Tylenchoidea. The phylogenetic relationships between H. columbus and other 6 genera of plant-parasitic nematodes were examined using protein-coding genes (PCGs). Results: The mitogenome of H. columbus is a circular AT-rich DNA molecule 25,228 bp in length. The annotation result comprises 12 PCGs, 2 ribosomal RNA genes, and 19 transfer RNA genes. No atp8 gene was found in the mitog- enome of H. columbus but long non-coding regions were observed in agreement to that reported for other plant- parasitic nematodes. The mitogenomic phylogeny of plant-parasitic nematodes in the superfamily Tylenchoidea agreed with previous molecular phylogenies. Mitochondrial gene synteny in H. columbus was unique but similar to that reported for other closely related species. Conclusions: The mitogenome of H. columbus is unique within the superfamily Tylenchoidea but exhibits similarities in both gene content and synteny to other closely related nematodes. -
Hirschmannia Ng Differentiated from Radopholusthorne, 1949
I Nemaiologica 7 (1962) : 197-202. Leiden, E. J. Brill HZRSCHMANNZA N.G. DIFFERENTIATED FROM RADOPHOLUS THORNE, 1949 (NEMATODA : TYLENCHOIDEA ) BY MICHEL LUC AND BASIL GOODEY O.R.S.T.O.M., I.D.E.R.T., Abidjan, Côte d’Ivoire and Rothamsted Experimental Station, Harpenden, England respectively Re-examination of a specimen of Tylenchorhyyncbus spinicaitdattls Sch. Stek., 1944 showed it to be conspecific with Rudopholus 1avubr.i Luc, 1957. This is made the type of Hirschmannia n.g. which also contains H. gracilis n. comb, and H: oryzne n. comb. The lectotype of H. spizicaudata is redescribed and Rndopholur redefined. Schuurmans Stelthoven ( 1944) described two female nematodes, from material collected in the Albert National Park, former Belgian Congo, as Tylenchorhynchus spinicaadatas. The species has been overlooked by nematologists and subsequently not dealt with in either general or specialised papers, though Tarjan (1961) records it. One of us (M.L.) has recently examined one of the original specimens and found that, in two important respects, the original description was inadequate: 1 ) there is a considerable overlap of oesophagus and intestine instead of an abutted junction as figured by Schuurmans Stelchoven (Fig. 1 a, c); 2) the lateral field is 217 of the body-width and is areolated so that each of the four incisures is crenate (Schuurmans Stekhoven reported the lateral fields at 118 of the body- width and not crenate). These clarifications of the form of the oesophagus, combined with the shape of the head, spear and tail, indicate that the species should be transferred from Tylenchorhync,haJJO Radopholtu. -
A Synopsis of the Genera and Species in the Tylenchorhynchinae (Tylenchoidea, Nematoda)1
OF WASHINGTON, VOLUME 40, NUMBER 1, JANUARY 1973 123 Speer, C. A., and D. M. Hammond. 1970. tured bovine cells. J. Protozool. 18 (Suppl.): Development of Eimeria larimerensis from the 11. Uinta ground squirrel in cell cultures. Ztschr. Vetterling, J. M., P. A. Madden, and N. S. Parasitenk. 35: 105-118. Dittemore. 1971. Scanning electron mi- , L. R. Davis, and D. M. Hammond. croscopy of poultry coccidia after in vitro 1971. Cinemicrographic observations on the excystation and penetration of cultured cells. development of Eimeria larimerensis in cul- Ztschr. Parasitenk. 37: 136-147. A Synopsis of the Genera and Species in the Tylenchorhynchinae (Tylenchoidea, Nematoda)1 A. C. TARJAN2 ABSTRACT: The genera Uliginotylenchus Siddiqi, 1971, Quinisulcius Siddiqi, 1971, Merlinius Siddiqi, 1970, Ttjlenchorhynchus Cobb, 1913, Tetylenchus Filipjev, 1936, Nagelus Thome and Malek, 1968, and Geocenamus Thorne and Malek, 1968 are discussed. Keys and diagnostic data are presented. The following new combinations are made: Tetylenchus aduncus (de Guiran, 1967), Merlinius al- boranensis (Tobar-Jimenez, 1970), Geocenamus arcticus (Mulvey, 1969), Merlinius brachycephalus (Litvinova, 1946), Merlinius gaudialis (Izatullaeva, 1967), Geocenamus longus (Wu, 1969), Merlinius parobscurus ( Mulvey, 1969), Merlinius polonicus (Szczygiel, 1970), Merlinius sobolevi (Mukhina, 1970), and Merlinius tatrensis (Sabova, 1967). Tylenchorhynchus galeatus Litvinova, 1946 is with- drawn from the genus Merlinius. The following synonymies are made: Merlinius berberidis (Sethi and Swarup, 1968) is synonymized to M. hexagrammus (Sturhan, 1966); Ttjlenchorhynchus chonai Sethi and Swarup, 1968 is synonymized to T. triglyphus Seinhorst, 1963; Quinisulcius nilgiriensis (Seshadri et al., 1967) is synonymized to Q. acti (Hopper, 1959); and Tylenchorhynchus tener Erzhanova, 1964 is regarded a synonym of T. -
Theory Manual Course No. Pl. Path
NAVSARI AGRICULTURAL UNIVERSITY Theory Manual INTRODUCTORY PLANT NEMATOLOGY Course No. Pl. Path 2.2 (V Dean’s) nd 2 Semester B.Sc. (Hons.) Agri. PROF.R.R.PATEL, ASSISTANT PROFESSOR Dr.D.M.PATHAK, ASSOCIATE PROFESSOR Dr.R.R.WAGHUNDE, ASSISTANT PROFESSOR DEPARTMENT OF PLANT PATHOLOGY COLLEGE OF AGRICULTURE NAVSARI AGRICULTURAL UNIVERSITY BHARUCH 392012 1 GENERAL INTRODUCTION What are the nematodes? Nematodes are belongs to animal kingdom, they are triploblastic, unsegmented, bilateral symmetrical, pseudocoelomateandhaving well developed reproductive, nervous, excretoryand digestive system where as the circulatory and respiratory systems are absent but govern by the pseudocoelomic fluid. Plant Nematology: Nematology is a science deals with the study of morphology, taxonomy, classification, biology, symptomatology and management of {plant pathogenic} nematode (PPN). The word nematode is made up of two Greek words, Nema means thread like and eidos means form. The words Nematodes is derived from Greek words ‘Nema+oides’ meaning „Thread + form‟(thread like organism ) therefore, they also called threadworms. They are also known as roundworms because nematode body tubular is shape. The movement (serpentine) of nematodes like eel (marine fish), so also called them eelworm in U.K. and Nema in U.S.A. Roundworms by Zoologist Nematodes are a diverse group of organisms, which are found in many different environments. Approximately 50% of known nematode species are marine, 25% are free-living species found in soil or freshwater, 15% are parasites of animals, and 10% of known nematode species are parasites of plants (see figure at left). The study of nematodes has traditionally been viewed as three separate disciplines: (1) Helminthology dealing with the study of nematodes and other worms parasitic in vertebrates (mainly those of importance to human and veterinary medicine). -
Sting Nematodes Modify Metabolomic Profiles of Host Plants
www.nature.com/scientificreports OPEN Sting nematodes modify metabolomic profles of host plants Denis S. Willett1,5*, Camila C. Filgueiras1,5, Nicole D. Benda2, Jing Zhang3 & Kevin E. Kenworthy4 Plant-parasitic nematodes are devastating pathogens of many important agricultural crops. They have been successful in large part due to their ability to modify host plant metabolomes to their beneft. Both root-knot and cyst nematodes are endoparasites that have co-evolved to modify host plants to create sophisticated feeding cells and suppress plant defenses. In contrast, the ability of migratory ectoparasitic nematodes to modify host plants is unknown. Based on global metabolomic profling of sting nematodes in African bermudagrass, ectoparasites can modify the global metabolome of host plants. Specifcally, sting nematodes suppress amino acids in susceptible cultivars. Upregulation of compounds linked to plant defense have negative impacts on sting nematode population densities. Pipecolic acid, linked to systemic acquired resistance induction, seems to play a large role in protecting tolerant cultivars from sting nematode feeding and could be targeted in breeding programs. Nematodes are ubiquitous denizens of belowground environments. While many are free-living, the more than 4000 plant-parasitic nematodes are devastating in their impacts on human agriculture1,2. Most important agri- cultural crops sufer yield suppression from plant-parasitic nematodes with annual economic damage estimates exceeding $100 billion1,3. This devastation is due in part to the success of plant-parasitic nematodes as pathogens in overcoming plant defenses. Indeed, the manner in which plant-parasitic nematodes overcome plant defenses makes them a model system for understanding basic plant biology and mechanisms of resistance3,4. -
Nematode Management in Lawns
Agriculture and Natural Resources FSA6141 Nematode Management in Lawns Aaron Patton Nematodes are pests of lawns in Assistant Professor - Arkansas, particularly in sandy soils. Turfgrass Specialist Nematodes are microscopic, unseg mented roundworms, 1/300 to 1/3 inch David Moseley in length (8) (Figure 1), that live in County Extension Agent the soil and can parasitize turfgrasses. Agriculture Ronnie Bateman Pest Management Anus Program Associate Figure 2. Parasitic nematode feeding on Head a plant root (Photo by U. Zunke, Nemapix Tail Vol. 2) Terry Kirkpatrick Stylet Professor - Nematologist There are six stages in the nematode life cycle including an egg stage and the adult. There are four Figure 1. Schematic drawing of a plant juvenile stages that allow the parasitic nematode (Adapted from N.A. nematode to increase in size and in Cobb, Nemapix Vol. 2) some species to change shape. These juvenile stages are similar to the Although most nematodes are larval stages found in insects. beneficial and feed on fungi, bacteria Nematodes are aquatic animals and, and insects or help in breaking down therefore, require water to survive. organic matter, there are a few Nematodes live and move in the water species that parasitize turfgrasses and film that surrounds soil particles. Soil cause damage, especially in sandy type, particularly sand content, has a soils. All parasitic nematodes have a major impact on the ability of nema stylet (Figure 1), a protruding, needle todes to move, infect roots and repro like mouthpart, which is used to punc duce. For most nematodes that are a ture the turfgrass root and feed problem in turf, well-drained sandy (Figure 2). -
Variation Among Populations of Belonolaimus Iongicaudatus I
Variation among Populations of Belonolaimus Iongicaudatus I R. T. ROBBINS and HEDWIG HIRSCHMANN 2 Abstract: Three North Carolina populations of Belonolairnus longicaudatus differed significantly from three Georgia populations in stylet measurements, the c ratio, the distance of the excretory pore from the anterior end for both sexes; the a ratio for females only; and the total body length, tail length, and spicule length for males only. The Georgia nematodes were stouter, and the females possessed sclerotized vaginal pieces. The distal portion of the spicules of North Carolina males had an indentation and hump lacking in those of the Georgia males. The haploid number of chromosomes was eight for males from all populations of B. longicaudatus and a North Carolina population of B. rnaritimus. Interpopulation matings of the Tarboro, N.C. and Tifton, Ga. populations indicated that the offspring produced were infertile. Morphological differences and reproductive isolation suggest that the North Carolina and the Georgia populations belong to different species. Key Words: morphology, cytology, hybridization, Belonolairnus maritimus, populations. The sting nematode, Belonolaimus North Carolina and Georgia populations longicaudatus Rau, an important plant were chosen because of their reported pathogen, has an extensive host range and difference in pathogenicity on peanuts. B. inflicts economic losses on a wide variety of maritimus was included in these studies for crops (3, 6, 8, 9, 15). Previous investigations comparative purposes. suggest that there are several pathotypes or physiological races (1, 14, 15). This nematode MATERIALS AND METHODS has been reported to be pathogenic on peanut in North Carolina and Virginia (9, 17, 18). In The six Belonolaimus longicaudatus Georgia, however, it did not cause injury or populations studied were from the following reproduce well on peanuts (5). -
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.