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Worms, Nematoda
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 2001 Worms, Nematoda 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 Gardner, Scott Lyell, "Worms, Nematoda" (2001). Faculty Publications from the Harold W. Manter Laboratory of Parasitology. 78. https://digitalcommons.unl.edu/parasitologyfacpubs/78 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 Encyclopedia of Biodiversity, Volume 5 (2001): 843-862. Copyright 2001, Academic Press. Used by permission. Worms, Nematoda Scott L. Gardner University of Nebraska, Lincoln I. What Is a Nematode? Diversity in Morphology pods (see epidermis), and various other inverte- II. The Ubiquitous Nature of Nematodes brates. III. Diversity of Habitats and Distribution stichosome A longitudinal series of cells (sticho- IV. How Do Nematodes Affect the Biosphere? cytes) that form the anterior esophageal glands Tri- V. How Many Species of Nemata? churis. VI. Molecular Diversity in the Nemata VII. Relationships to Other Animal Groups stoma The buccal cavity, just posterior to the oval VIII. Future Knowledge of Nematodes opening or mouth; usually includes the anterior end of the esophagus (pharynx). GLOSSARY pseudocoelom A body cavity not lined with a me- anhydrobiosis A state of dormancy in various in- sodermal epithelium. -
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). -
Biology and Control of the Anguinid Nematode
BIOLOGY AND CONTROL OF THE AIIGTIINID NEMATODE ASSOCIATED WITH F'LOOD PLAIN STAGGERS by TERRY B.ERTOZZI (B.Sc. (Hons Zool.), University of Adelaide) Thesis submitted for the degree of Doctor of Philosophy in The University of Adelaide (School of Agriculture and Wine) September 2003 Table of Contents Title Table of contents.... Summary Statement..... Acknowledgments Chapter 1 Introduction ... Chapter 2 Review of Literature 2.I Introduction.. 4 2.2 The 8acterium................ 4 2.2.I Taxonomic status..' 4 2.2.2 The toxins and toxin production.... 6 2.2.3 Symptoms of poisoning................. 7 2.2.4 Association with nematodes .......... 9 2.3 Nematodes of the genus Anguina 10 2.3.1 Taxonomy and sYstematics 10 2.3.2 Life cycle 13 2.4 Management 15 2.4.1 Identifi cation...................'..... 16 2.4.2 Agronomicmethods t6 2.4.3 FungalAntagonists l7 2.4.4 Other strategies 19 2.5 Conclusions 20 Chapter 3 General Methods 3.1 Field sites... 22 3.2 Collection and storage of Polypogon monspeliensis and Agrostis avenaceø seed 23 3.3 Surface sterilisation and germination of seed 23 3.4 Collection and storage of nematode galls .'.'.'.....'.....' 24 3.5 Ext¡action ofjuvenile nematodes from galls 24 3.6 Counting nematodes 24 3.7 Pot experiments............. 24 Chapter 4 Distribution of Flood Plain Staggers 4.1 lntroduction 26 4.2 Materials and Methods..............'.. 27 4.2.1 Survey of Murray River flood plains......... 27 4.2.2 Survey of southeastern South Australia .... 28 4.2.3 Surveys of northern New South Wales...... 28 4.3 Results 29 4.3.1 Survey of Murray River flood plains... -
Anguina Tritici
Anguina tritici Scientific Name Anguina tritici (Steinbuch, 1799) Chitwood, 1935 Synonyms Anguillula tritici, Rhabditis tritici, Tylenchus scandens, Tylenchus tritici, and Vibrio tritici Common Name(s) Nematode: Wheat seed gall nematode Type of Pest Nematode Taxonomic Position Class: Secernentea, Order: Tylenchida, Family: Anguinidae Reason for Inclusion in Manual Pests of Economic and Environmental Concern Listing 2017 Background Information Anguina tritici was discovered in England in 1743 and was the first plant parasitic nematode to be recognized (Ferris, 2013). This nematode was first found in the United States in 1909 and subsequently found in numerous states, where it was primarily found in wheat but also in rye to a lesser extent (PERAL, 2015). Modern agricultural practices, including use of clean seed and crop rotation, have all but eliminated A. tritici in countries which have adopted these practices, and the nematode has not been found in the United States since 1975 (PERAL, 2015). However, A. tritici is still a problem in third world countries where such practices are not widely adapted (SON, n.d.). Figure 1: Brightfield light microscope images of an A. tritici female as seen under low power In addition, trade issues have arisen due to magnification. J. D. Eisenback, Virginia Tech, conflicting records of A. tritici in the United bugwood.org States (PERAL, 2015). 1 Figure 2: Wheat seed gall broken open to reveal Figure 3: Seed gall teased apart to reveal adult thousands of infective juveniles. Michael McClure, males and females and thousands of eggs. J. University of Arizona, bugwood.org D. Eisenback, Virginia Tech, bugwood.org Pest Description Measurements (From Swarup and Gupta (1971) and Krall (1991): Egg: 85 x 38 μm on average, but may also be larger (130 x 63 μm). -
Rathayibacter Poisoning
Recovery Plan For Rathayibacter Poisoning Caused by Rathayibacter toxicus (syn. Clavibacter toxicus) February, 2010 Contents: Page Executive Summary 2 Contributors and Reviewers 4 I. Introduction 5 II. Disease Development and Symptoms 7 III. Plant Infection, Spread of the Bacterium, and Animal Poisoning 10 IV. Monitoring and Detection 11 V. Response 12 VI. USDA Pathogen Permits 13 VII. Economic Impact and Compensation 14 VIII. Mitigation and Disease Management 14 IX. Infrastructure and Experts 15 X. Research, Extension, and Education 16 References 19 Web Resources 23 Appendices 24 This recovery plan is one of several disease-specific documents produced as part of the National Plant Disease Recovery System (NPDRS) called for in Homeland Security Presidential Directive Number 9 (HSPD-9). The purpose of the NPDRS is to ensure that the tools, infrastructure, communication networks, and capacity required to minimize the impact of high consequence plant disease outbreaks are available so that a adequate level of crop production is maintained. Each disease-specific plan is intended to provide a brief primer on the disease, assess the status of critical recovery components, and identify disease management research, extension, and education needs. These documents are not intended to be stand-alone documents that address all of the many and varied aspects of plant disease outbreaks and all of the decisions that must be made and actions taken to achieve effective response and recovery. They are, however, documents that will help the USDA to further guide efforts toward plant disease recovery. Executive Summary Rathayibacter (Clavibacter) toxicus was added to the Select Agent List in 2008 due primarily to the potential damage affecting domesticated forage-consuming animals in the U.S. -
Biology and Histopathology of Different
1 BIOLOGY AND HISTOPATHOLOGY OF DIFFERENT ISOLATES OF ANGUINA TRITICI ON TRITICUM SPP. by Riadh Falih Al-Sabie B.Sc. (Baghdad), DIC. (Imperial College), M.Sc. (London) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY IN THE FACULTY OF SCIENCE, UNIVERSITY OF LONDON. Department of Zoology and Applied Entomology Imperial College at Silwood Park Imperial College of Science and Technology AshursE Lodge Sunninghill Ascot Berkshire: ENGLAND September, 1980. 11 ABSTRACT Isolates of Anguina tritici from Australia, England, India, Iraq and U.S.A. were maintained on spring wheat. Measurements of males and females and second stage juveniles (J2) showed consistent morphometric differences between some isolates. Host range studies on species and varieties of Triticwn and AegiZops indicated an ability to infect a wide range of hosts of which 9 were new records. Infection studies on naturally infected wheat revealed that the growing point was invaded by the second stage juveniles shortly after flower induction. Artificial inoculation of wheat plants showed that the infective stage needed an association with the flower primordia for at least 24 days (latent period) for galling to be initiated. Further studies were made on the effect of temperature on invasion and distribution of galls in artificially inoculated heads. The histopathology of infection and subsequent gall development was observed. J2 invaded the primordia of either one stamen only (outer anther), ovary only or both to form the gall. The J2 survived in the soil for 250 days in the absence of a host, and some could still infect and form galls after 225 days. J2 from all isolates could not survive for more than 40 days in aerated water. -
Nematology Training Manual
NIESA Training Manual NEMATOLOGY TRAINING MANUAL FUNDED BY NIESA and UNIVERSITY OF NAIROBI, CROP PROTECTION DEPARTMENT CONTRIBUTORS: J. Kimenju, Z. Sibanda, H. Talwana and W. Wanjohi 1 NIESA Training Manual CHAPTER 1 TECHNIQUES FOR NEMATODE DIAGNOSIS AND HANDLING Herbert A. L. Talwana Department of Crop Science, Makerere University P. O. Box 7062, Kampala Uganda Section Objectives Going through this section will enrich you with skill to be able to: diagnose nematode problems in the field considering all aspects involved in sampling, extraction and counting of nematodes from soil and plant parts, make permanent mounts, set up and maintain nematode cultures, design experimental set-ups for tests with nematodes Section Content sampling and quantification of nematodes extraction methods for plant-parasitic nematodes, free-living nematodes from soil and plant parts mounting of nematodes, drawing and measuring of nematodes, preparation of nematode inoculum and culturing nematodes, set-up of tests for research with plant-parasitic nematodes, A. Nematode sampling Unlike some pests and diseases, nematodes cannot be monitored by observation in the field. Nematodes must be extracted for microscopic examination in the laboratory. Nematodes can be collected by sampling soil and plant materials. There is no problem in finding nematodes, but getting the species and numbers you want may be trickier. In general, natural and undisturbed habitats will yield greater diversity and more slow-growing nematode species, while temporary and/or disturbed habitats will yield fewer and fast- multiplying species. Sampling considerations Getting nematodes in a sample that truly represent the underlying population at a given time requires due attention to sample size and depth, time and pattern of sampling, and handling and storage of samples. -
Worms, Nematoda
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Scott Gardner Publications & Papers Parasitology, Harold W. Manter Laboratory of Winter 1-1-2013 Worms, Nematoda Scott Lyell Gardner University of Nebraska - Lincoln, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/slg Part of the Animal Sciences Commons, Biodiversity Commons, Biology Commons, Ecology and Evolutionary Biology Commons, and the Parasitology Commons Gardner, Scott Lyell, "Worms, Nematoda" (2013). Scott Gardner Publications & Papers. 15. https://digitalcommons.unl.edu/slg/15 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 Scott Gardner Publications & Papers by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. digitalcommons.unl.edu Worms, Nematoda Scott Lyell Gardner University of Nebraska-Lincoln, Lincoln, NE, USA Glossary Anhydrobiosis State of dormancy in various invertebrates due to low humidity or desiccation. Cuticle Noncellular external layer of the body wall of various invertebrates. Gubernaculum Sclerotized trough-shaped structure of the dorsal wall of the spicular pouch, near the distal portion of the spicules; functions for reinforcement of the dorsal wall. Hypodermis Cellular, subcuticular layer that secretes the cuticle of annelids, nematodes, arthropods (see epidermis), and various other invertebrates. Pseudocoelom Body cavity not lined with a mesodermal epithelium. Spicule Bladelike, sclerotized male copulatory organs, usually paired, located immediately dorsal to the cloaca. Stichosome Longitudinal series of cells (stichocytes) that form the posterior esophageal glands in Trichuris. Stoma Mouth or buccal cavity, from the oral opening and usually includes the anterior end of the esophagus (pharynx). -
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. -
Soil Nematodes in Terrestrial Ecosystems ~ G
JOURNAL OF NEMATOLOGY VOLUME ll JULY 1979 NUMBER 3 Soil Nematodes in Terrestrial Ecosystems ~ G. W. YEATES 2 Abstract: There has been much work on plant-feeding nematodes, and less on other soil nema- todes, their distribution, abundance, intrinsic properties, and interactions with biotic and abiotic factors. Seasonal variation in nematode fauna as a whole is correlated with factors such as moisture, temperature, and plant growth; at each site nematode distribution generally reflects root distribution. There is a positive correlation between average nematode abundance and primary production as controlled by moisture, temperature, nutrients, etc. Soil nematodes, whether bacterial feeders, fungivores, plant feeders, omnivores, or predators, all influence the populations of the organisms they feed on. Ahhough soil trematodes probably contribute less than 1% to soil respiration they may play an important role in ntttrient cycling in the soil through their influence on bacterial growth and plant nutrient availability. Key Wo~ds: ecology, energetics, microcosms, nutrient cycling, primary production. Nematodes, as one component of the soil nematode populations are more likely to be ecosystem, interact with biotic and abiotic ill equilibrium, albeit dynamic, with their factors, producing economic crop losses enviromnent, than in cultivated fields where but also having many other effects, largely conditions are subject to more drastic unknown. The role of the nematode com- changes. In interpretation, however, knowl- munity in ecosystems is essential knowledge edge of plant nematode biology and for managing plant nematode populations interactions derived from agriculture are (42), clarifying the role of nematodes in nsed. dispersing algae, fungi, bacteria, phages, and Nematodes feed on a wide range of viruses (103, 104), decreasing energy inputs foods, and this paper uses the following to farming, disposing of organic wastes (57), trophic groups: bacterial feeders, fungivores, and dealing with nematode tolerance to plant feeders, onmivores, predators. -
The Plant-Parasitic Nematode Songbook Anthology
THE PLANT-PARASITIC NEMATODE SONGBOOK ANTHOLOGY LYRICS BY KATHY MERRIFIELD I wrote the three volumes of The Plant-Parasitic Nematode Songbook in the late 1980s and early 1990s during work on an MS in Nematode Diseases of Plants and then as a research assistant with Professor Russ Ingham at Oregon State University. These included Volume I: Serious Music for Serious Pests, Volume II: More Serious Music for Serious Pests, and Volume III: Camp Songs. The melodies were hand-written on staff paper; the lyrics were also hand- written. Each of the three volumes existed as comb-bound hard copies. When my supply of hard copies ran low, I replaced them with The Plant-Parasitic Nematode Songbook Anthology, which was also produced as comb-bound hard copies. The lyrics were computer-printed, and the melodies were omitted. As in this digital version, I figured that most people don’t read music, so it really wouldn’t help much. Besides, many of the melodies are familiar. Maybe melodies can be added in the future – maybe even computer generated so they’re legible. The Anthology contained three new songs in addition to those from the first three volumes. These were cowboy songs from the forthcoming Volume IV: Cowboy Songs. Volume IV has now been forthcoming for about twenty years. PROCESSIONAL Melody: Kahinto Kamya, Processional (Camp Fire Girls) -- by Helen Gerrish Hughes, © Camp Fire, 1954 We dig the soil from our random design With measured tread and slow Because this stand is in deep decline Because it's infested with nematodes Nematodes, nematodes We harvest nematodes out of the soil With measured water and slow It's worth the hours of grueling toil To find parasitic nematodes Nematodes, nematodes We count a thousand samples a day With measured fingers and slow Our eyeballs twirl and our brains decay Because we've seen so many nematodes Nematodes, nematodes *********************************** Helen Gerrish Hughes was born Abbie Gerrish in 1863. -
Classification of Plant Diseases
K. K. WAGH COLLEGE OF AGRICULTURE, NASHIK DEPARTMENT OF PLANT PATHOLOGY THEORY NOTES Course No.: - PATH -121 Course Title: - Fundamentals of Plant Pathology Credits: - 3 (2+1) Compiled By Prof. Patil K.P. Assistant Professor Department of Plant Pathology Teaching Schedule a) Theory Lecture Topic Weightage (%) 1 Importance of plant diseases, scope and objectives of Plant 3 Pathology..... 2 History of Plant Pathology with special reference to Indian work 3 3,4 Terms and concepts in Plant Pathology, Pathogenesis 6 5 classification of plant diseases 5 6,7, 8 Causes of Plant Disease Biotic (fungi, bacteria, fastidious 10 vesicular bacteria, Phytoplasmas, spiroplasmas, viruses, viroids, algae, protozoa, and nematodes ) and abiotic causes with examples of diseases caused by them 9 Study of phanerogamic plant parasites. 3 10, 11 Symptoms of plant diseases 6 12,13, Fungi: general characters, definition of fungus, somatic structures, 7 14 types of fungal thalli, fungal tissues, modifications of thallus, 15 Reproduction in fungi (asexual and sexual). 4 16, 17 Nomenclature, Binomial system of nomenclature, rules of 6 nomenclature, 18, 19 Classification of fungi. Key to divisions, sub-divisions, orders and 6 classes. 20, 21, Bacteria and mollicutes: general morphological characters. Basic 8 22 methods of classification and reproduction in bacteria 23,24, Viruses: nature, architecture, multiplication and transmission 7 25 26, 27 Nematodes: General morphology and reproduction, classification 6 of nematode Symptoms and nature of damage caused by plant nematodes (Heterodera, Meloidogyne, Anguina etc.) 28, 29, Principles and methods of plant disease management. 6 30 31, 32, Nature, chemical combination, classification of fungicides and 7 33 antibiotics.