History of Plant Pathology at Montana State University
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Infectivity of Verticillium Dahliae Isolates on Weedy Hosts
INFECTIVITY OF VERTICILLIUM DAHLIAE ISOLATES ON WEEDY HOSTS, LITCHI TOMATO, AND TEFF, AND THE EFFECT OF ALFALFA RESIDUE INCORPORATION ON THE NUMBER OF VERTICILLIUM DAHLIAE MICROSCLEROTIA, AND SOIL BACTERIAL METAGENOMICS By ZACHARY ANDREW FREDERICK A dissertation submitted in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY WASHINGTON STATE UNIVERSITY Department of Plant Pathology MAY 2017 © Copyright by ZACHARY ANDREW FREDERICK, 2017 All Rights Reserved © Copyright by ZACHARY ANDREW FREDERICK, 2017 All Rights Reserved To the Faculty of Washington State University: The members of the Committee appointed to examine the dissertation of ZACHARY ANDREW FREDERICK find it satisfactory and recommend that it be accepted. ___________________________________ Dennis A. Johnson, Ph.D, Chair. ___________________________________ Mark J. Pavek, Ph.D. ___________________________________ Debra A. Inglis, Ph.D. ___________________________________ Weidong Chen, Ph.D. ii ACKNOWLEDGMENTS I thank Dr. Dennis A. Johnson for the opportunity to pursue the study of plant pathology, cooperative extension, and potato disease at Washington State University through his program. I also thank Thomas F. Cummings for instruction and support of establishing trials, as well as guidance on statistical analyses. I wish to thank my committee members, Drs. Mark J. Pavek, Debra A. Inglis, and Weidong Chen for their critiques and guidance. I am grateful for my present and former members of my laboratory workgroup, including David Wheeler and Dr. Lydia Tymon for direction and toleration of my contributions to entropy, as well as Dr. Jeremiah Dung for his isolates and copious notes left behind. Would you kindly join me in extending special thanks to Dr. Kerik Cox, who continues to serve as an additional adviser. -
1 Principles of Plant Pathology Path
PRINCIPLES OF PLANT PATHOLOGY PATH 271 (1+1) Prepared By DR. P. KISHORE VARMA, ASSISTANT PROFESSOR, DEPARTMENT OF PLANT PATHOLOGY AGRICULTURAL COLLEGE, ASWARAOPET 507 301 1 LECTURE 1 INTRODUCTION TO PLANT PATHOLOGY Why Plant Pathology? Plants are essential for maintenance of life. Plants not only sustain the man and animals, they are also the source of food for multitudes of micro-organisms living in the ecosystem. Thus, while man has been able to subjugate plants and animals for his own use, the competing micro-organisms still defy his efforts and claim a major share of resources which man would like to use for himself. It is in this context that the need for fighting the competing micro-organisms and other agencies that lack loss of productivity has been felt. The attack on plants by these micro-organisms changed the appearance and productivity of the crop and this observed change was called a disease. Plant diseases have been considered as stubborn barriers to the rapid progress of food production. We call a plant healthy only so long as it continues to perform all its normal physiological activities and give the expected yield according to its genetic potentiality. Physiological activities of a healthy plant 1. Normal cell division, differentiation and development. 2. Uptake of water and nutrients from the soil. 3. Synthesis of food from sunlight by photosynthesis. 4. Translocation of water and food to the sites of necessity through xylem and phloem. 5. Metabolism of synthesized material 6. Reproduction A diseased plant fails to perform one or more of these functions. -
Plant-Parasitic Algae (Chlorophyta: Trentepohliales) in American Samoa1
Plant-Parasitic Algae (Chlorophyta: Trentepohliales) in American Samoa1 Fnd E. Erooks 2 Abstract: A survey conducted betweenJune 2000 and May 2002 on the island of Tutuila, American Samoa, recorded filamentous green algae of the order Tren tepohliales (CWorophyta) and their plant hosts. Putative pathogenicity of the parasitic genus Cephaleuros and its lichenized state, Strig;ula, was also inves tigated. Three genera and nine species were identified: Cephaleuros (five spp.), Phycopeltis (two spp.), and Stomatochroon (two spp.). A widely distributed species of Trentepohlia was not classified. These algae occurred on 146 plant species and cultivars in 101 genera and 48 families; 90% of the hosts were dicotyledonous plants. Cephaleuros spp. have aroused worldwide curiosity, confusion, and con cern for over a century. Their hyphaelike filaments, sporangiophores, and as sociated plant damage have led unsuspecting plant pathologists to misidentify them as fungi, and some phycologists question their parasitic ability. Of the five species of Cephaleuros identified, C. virescens was the most prevalent, followed by C. parasiticus. Leaf tissue beneath thalli of Cephaleuros spp. on 124 different hosts was dissected with a scalpel and depth of necrosis evaluated using a four point scale. No injury was observed beneath thalli on 6% of the hosts, but full thickness necrosis occurred on leaves of 43% of hosts. Tissue damage beneath nonlichenized Cephaleuros thalli was equal to or greater than damage beneath lichenized thalli (Strig;ula elegans). In spite of moderate to severe leaf necrosis caused by Cephaleuros spp., damage was usually confined to older leaves near the base of plants. Unhealthy, crowded, poorly maintained plants tended to have the highest percentage of leaf surface area affected by TrentepoWiales. -
Quantitative Trait Loci Analysis for Resistance to Cephalosporium Stripe, a Vascular Wilt Disease of Wheat
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by ICRISAT Open Access Repository Theor Appl Genet (2011) 122:1339–1349 DOI 10.1007/s00122-011-1535-6 ORIGINAL PAPER Quantitative trait loci analysis for resistance to Cephalosporium stripe, a vascular wilt disease of wheat Martin C. Quincke • C. James Peterson • Robert S. Zemetra • Jennifer L. Hansen • Jianli Chen • Oscar Riera-Lizarazu • Christopher C. Mundt Received: 20 August 2010 / Accepted: 6 January 2011 / Published online: 23 January 2011 Ó Springer-Verlag 2011 Abstract Cephalosporium stripe, caused by Cephalo- on each RIL in three field environments under artificially sporium gramineum, can cause severe loss of wheat inoculated conditions. A linkage map for this population (Triticum aestivum L.) yield and grain quality and can be was created based on 204 SSR and DArT markers. A total an important factor limiting adoption of conservation till- of 36 linkage groups were resolved, representing portions age practices. Selecting for resistance to Cephalosporium of all chromosomes except for chromosome 1D, which stripe is problematic; however, as optimum conditions for lacked a sufficient number of polymorphic markers. disease do not occur annually under natural conditions, Quantitative trait locus (QTL) analysis identified seven inoculum levels can be spatially heterogeneous, and little is regions associated with resistance to Cephalosporium known about the inheritance of resistance. A population of stripe, with approximately equal additive effects. Four 268 recombinant inbred lines (RILs) derived from a cross QTL derived from the more susceptible parent (Brundage) between two wheat cultivars was characterized using field and three came from the more resistant parent (Coda), but screening and molecular markers to investigate the inher- the cumulative, additive effect of QTL from Coda was itance of resistance to Cephalosporium stripe. -
Deciphering the Presence and Activity of Fungal Communities in Marine Sediments Using a Model Estuarine System
Vol. 70: 45–62, 2013 AQUATIC MICROBIAL ECOLOGY Published online August 6 doi: 10.3354/ame01638 Aquat Microb Ecol Deciphering the presence and activity of fungal communities in marine sediments using a model estuarine system Gaëtan Burgaud1,*, Sarah Woehlke2, Vanessa Rédou1, William Orsi3, David Beaudoin3, Georges Barbier1, Jennifer F. Biddle2, Virginia P. Edgcomb3 1Laboratoire Universitaire de Biodiversité et Ecologie Microbienne (EA3882), IFR 148, Université Européenne de Bretagne, Université de Brest, ESIAB, Technopole Brest-Iroise, Parvis Blaise Pascal, Plouzané 29280, France 2College of Earth, Ocean and the Environment, University of Delaware, Lewes, Delaware 19958, USA 3Geology and Geophysics Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA ABSTRACT: Fungi are known to play key roles in ecologically important biogeochemical cycles and food webs. Most knowledge of environmental groups of fungi comes from terrestrial environ- ments, and little is known about the potential for terrestrial fungi to colonize marine environ- ments. We investigated the Delaware River estuary and bay as a model estuarine system to study the fungal community changes occurring along a transect from terrestrially influenced waters and sediments to a higher salinity, truly marine system. DNA-based clone libraries and a culture col- lection built using subseafloor sediment samples revealed that Ascomycota dominated the detected diversity ahead of Basidiomycota and Chytridiomycota. A clear transition in fungal com- munities from terrestrially influenced and low salinity environments to marine environments was visualized. A complementary RNA-based analysis coupled with fluorescence in situ hybridization of sediments indicated that only few fungi were metabolically active in marine sediments. Culti- vation of pelagic and sedimentary fungi allowed clear identification and physiology testing of fun- gal communities of the Delaware Bay. -
Plant Pathology
Plant Pathology 330-1 Reading / Reference Materials CSU Extension Fact Sheets o Aspen and poplar leaf spots – #2.920 o Backyard orchard: apples and pears [pest management] – #2.800 o Backyard orchard: stone fruits [pest management] – #2.804 o Bacterial wetwood – #2.910 o Cytospora canker – #2.937 o Diseases of roses in Colorado – #2.946 o Dollar spot disease of turfgrass – #2.933 o Dutch elm disease – #5.506 o Dwarf mistletoe management – #2.925 o Fairy ring in turfgrass – #2.908 o Fire blight – #2.907 o Forest fire – Insects and diseases associated with forest fires – #6.309 o Friendly pesticides for home gardens – #2.945 o Greenhouse plant viruses (TSWV-INSV) – #2.947 o Honeylocust diseases – #2.939 o Juniper-hawthorn rust – #2.904 o Juniper-hawthorn rust – #2.904 o Leaf spot and melting out diseases – #2.909 o Necrotic ring spot in turfgrass – #2.900 o Non-chemical disease control – #2.903 o Pesticides – Friendly pesticides for home gardens – #2.945 o Pinyon pine insects and diseases – #2.948 o Powdery mildew – #2.902 o Roses – Diseases of roses in Colorado – #2.946 o Russian olive decline and gummosis – #2.942 o Strawberry diseases – #2.931 o Sycamore anthracnose – #2.930 CSU Extension Publications o Insects and diseases of woody plants of the central Rockies – 506A Curriculum developed by Mary Small, CSU Extension, Jefferson County • Colorado State University, U.S. Department of Agriculture and Colorado counties cooperating. • CSU Extension programs are available to all without discrimination. • No endorsement of products named is intended, nor is criticism implied of products not mentioned. -
Etiology,Loss, Symptoms and Control of Diseases
Phytopathology is a branch of Botany that deals with causal organism,etiology,loss, symptoms and control of diseases. ETIOLOGY:-Science of cause of disease. Pathology (Greek word‘Pathos’ and ‘Logos’.) Pathos =Suffering Logos=Study “Study of Plant Sufferings” Or “Study of Plant Diseases”. FATHER OF PLANT PATHOLOGY- ANTON de Bary. Aims of plant pathology } To make a survey of the living as well as non- living causes of the diseases. } To study the different types of mechanisms by which the diseases are developed in plants. } To elucidate the interaction mechanism among plants,pathogen and the environment. } Minimize the loss of useful plants through application of the principles of plant disease prevention. } To prevent plant disease epidemics or to delay their onset until the harvest time is over. DISEASE Disease in a plant involves a number of harmful Physiological processes which leads to a lot of irregularities in the morphology and anatomy of the host. SYMPTOMS The altered and disadvantageous differences of the host from the normal plant are referred to as Symptoms of the disease. 1. Host : An organism that harbours or supports the activities of a parasite . 2.Suscept :An organism that is susceptible or prone to disease. 3.Susceptibility :It is the inability of a plant to resist the effect of a pathogen or any other damaging factor. 4.Parasite :It is an organism or virus existing in an intimate association with another living organism from which it derives an essential part of the materials for its existance. 5.Pathogen :A pathogen is an organism or virus capable of causing disease in a particular host. -
Anatolian Journal Of
Anatolian Journal of e-ISSN 2602-2818 5(1) (2021) - Anatolian Journal of Botany Anatolian Journal of Botany e-ISSN 2602-2818 Volume 5, Issue 1, Year 2021 Published Biannually Owner Prof. Dr. Abdullah KAYA Corresponding Address Gazi University, Science Faculty, Department of Biology, 06500, Ankara – Turkey Phone: (+90 312) 2021235 E-mail: [email protected] Web: http://dergipark.gov.tr/ajb Editor in Chief Prof. Dr. Abdullah KAYA Editorial Board Dr. Alfonso SUSANNA– Botanical Institute of Barcelona, Barcelona, Spain Prof. Dr. Ali ASLAN – Yüzüncü Yıl University, Van, Turkey Dr. Boris ASSYOV – Istitute of Biodiversity and Ecosystem Research, Sofia, Bulgaria Dr. Burak SÜRMEN – Karamanoğlu Mehmetbey University, Karaman, Turkey Prof. Cvetomir M. DENCHEV – Istititute of Biodiv. & Ecosystem Res., Sofia, Bulgaria Assoc. Prof. Dr. Gökhan SADİ – Karamanoğlu Mehmetbey Univ., Karaman, Turkey Prof. Dr. Güray UYAR – Hacı Bayram Veli University, Ankara, Turkey Prof. Dr. Hamdi Güray KUTBAY – Ondokuz Mayıs University, Samsun, Turkey Prof. Dr. İbrahim TÜRKEKUL – Gaziosmanpaşa University, Tokat, Turkey Prof. Dr. Kuddusi ERTUĞRUL – Selçuk University, Konya, Turkey Prof. Dr. Lucian HRITCU – Alexandru Ioan Cuza Univeversity, Iaşi, Romania Prof. Dr. Tuna UYSAL – Selçuk University, Konya, Turkey Prof. Dr. Yusuf UZUN – Yüzüncü Yıl University, Van, Turkey Advisory Board Prof. Dr. Ahmet AKSOY – Akdeniz University, Antalya, Turkey Prof. Dr. Asım KADIOĞLU – Karadeniz Technical University, Trabzon, Turkey Prof. Dr. Ersin YÜCEL – Eskişehir Technical University, Eskişehir, -
Major Diseases of Horticultural Crops and Their Management
Major Diseases of Horticultural Crops and this Management Dr.G. Thiribhuvanamala, Dr.S.Nakkeeran and Dr. K.Eraivan Arutkani Aiyanathan Department of Plant Pathology Centre for Plant Protection Studies Tamil Nadu Agricultural University Coimbatore – 641 003 Introduction: The Horticulture (fruits including nuts, vegetables including potato, tuber crops, mushroom, ornamental plants including cut flowers, spices, plantation crops and medicinal and aromatic plants) has become a key drivers for economic development in many of the states in the country and it contributes 30.4 per cent to GDP of agriculture, which calls for knowledge and technical backstopping. Intensive cultivation of the high valued horticultural crops, resulted in the outbreak of several diseases of National importance. In recent days, stakeholders import planting materials from North American Countries. Introduction of planting materials also impose threat in the introduction of new diseases not known to be present earlier. However, the diseases, if not managed on a war foot, it will result in drrastic yield reduction and quality of the produces. Hence adoption of suitable management measures with low residue levels in the final produces becomes as a need of the hour. In this regard, this paper gives emphasis on the diagnosis of plant diseases and their management. 293 Diseases of Mango and their management 1. Anthracnose :Colletotrichum gloeosporioides Anthracnose symptoms occur on leaves, twigs, petioles, flower clusters (panicles), and fruits. The incidence of this disease can reach almost 100% in fruit produced under wet or very humid conditions. On leaves, lesions start as small, angular, brown to black spots and later enlarge to form extensive dead areas. -
Prediction of Disease Damage, Determination of Pathogen
PREDICTION OF DISEASE DAMAGE, DETERMINATION OF PATHOGEN SURVIVAL REGIONS, AND CHARACTERIZATION OF INTERNATIONAL COLLECTIONS OF WHEAT STRIPE RUST By DIPAK SHARMA-POUDYAL A dissertation submitted in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY WASHINGTON STATE UNIVERSITY Department of Plant Pathology MAY 2012 To the Faculty of Washington State University: The members of the Committee appointed to examine the dissertation of DIPAK SHARMA-POUDYAL find it satisfactory and recommend that it be accepted. Xianming Chen, Ph.D., Chair Dennis A. Johnson, Ph.D. Kulvinder Gill, Ph.D. Timothy D. Murray, Ph.D. ii ACKNOWLEDGEMENTS I would like to express my sincere gratitude to Dr. Xianming Chen for his invaluable guidance, moral support, and encouragement throughout the course of the study. I would like to thank Drs. Dennis A. Johnson, Kulvinder Gill, and Timothy D. Murray for serving in my committee and their valuable suggestions for my project. I also like to thank Dr. Mark Evans, Department of Statistics, for his statistical advice on model development and selection. I am grateful to Dr. Richard A. Rupp, Department of Crop and Soil Sciences, for his expert advice on using GIS techniques. I am thankful to many wheat scientists throughout the world for providing stripe rust samples. Thanks are also extended to Drs. Anmin Wan, Kent Evans, and Meinan Wang for their kind help in the stripe rust experiments. Special thanks to Dr. Deven See for allowing me to use the genotyping facilities in his lab. Suggestions on data analyses by Dr. Tobin Peever are highly appreciated. I also like to thank my fellow graduate students, especially Jeremiah Dung, Ebrahiem Babiker, Jinita Sthapit, Lydia Tymon, Renuka Attanayake, and Shyam Kandel for their help in many ways. -
Education in Plant Pathology Present Status and Future Challenges James Macdonald University of California, [email protected]
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Papers in Plant Pathology Plant Pathology Department 12-2009 Education in Plant Pathology Present Status and Future Challenges James MacDonald University of California, [email protected] Caitilyn Allen University of Wisconsin David Gadoury Cornell University William Jacobi Colorado State University Segenet Kelemu International Livestock Research Institute See next page for additional authors Follow this and additional works at: http://digitalcommons.unl.edu/plantpathpapers Part of the Other Plant Sciences Commons, Plant Biology Commons, and the Plant Pathology Commons MacDonald, James; Allen, Caitilyn; Gadoury, David; Jacobi, William; Kelemu, Segenet; Moyer, James; Murray, Tim; Ong, Kevin; Pearson, Charles; Sherwood, John; and Vidaver, Ann, "Education in Plant Pathology Present Status and Future Challenges" (2009). Papers in Plant Pathology. 322. http://digitalcommons.unl.edu/plantpathpapers/322 This Article is brought to you for free and open access by the Plant Pathology Department at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Papers in Plant Pathology by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Authors James MacDonald, Caitilyn Allen, David Gadoury, William Jacobi, Segenet Kelemu, James Moyer, Tim Murray, Kevin Ong, Charles Pearson, John Sherwood, and Ann Vidaver This article is available at DigitalCommons@University of Nebraska - Lincoln: http://digitalcommons.unl.edu/plantpathpapers/322 -
Principles of Plant Pathology
PRINCIPLES OF PLANT PATHOLOGY Pl. Path. 111 (Cr. Hrs. 3+1) P.N. Sharma Department of Plant Pathology, CSK HPKV, Palampur (H.P.) An introduction to Plant Pathology What is Plant Pathology? Objectives of Plant Pathology Disease & Disorder Plant Pathogens Classification of diseases Terminology What is Plant Pathology? Phytopathology (Phyton : plant) Greek - Pathos (suffering) + Logos (study) = The study of the suffering plant Plant pathology is that branch of agricultural, botanical or biological sciences which deals with the study of: cause of the disease Resulting losses and Control of plant diseases Objectives of Plant pathology 1. Study of origin, causes or reasons. Study of living, non- living and other causes of disease or disorder in plants- Etiology: 2. Study of mechanism of disease development i.e. processes of infection and colonization of the host by the pathogen. This phase involves complex host-pathogen interactions- Pathogenesis 3. study the interaction between the causal agent and the diseased plants in relation to environmental conditions. Generally at the population level- Epidemiology 4. Development of management systems of the diseases land reduction of losses caused by them- Control/ Management. What is health? The ability to carry out normal physiological functions at a acceptable level consistent to genetic potential. Normal physiological functions include: – Normal call division, differentiation, and development, – Absorption of water and minerals from the soil and translocation; – Photosynthesis and translocation of photosynthates; – Utilization and storage of photosynthates; – Metabolism of metabolites and synthates; – Reproduction; – Storage of reserves for overwintering or reproduction. Plant pathology is both science (of Learning and understanding the nature of disease ) and Art (of diagnosing and controlling the disease) The Concept of Disease in Plants plant is healthy, or normal, when it can carry out its physiological functions to the best of its genetic potential.