Download or read book Field Scale Spatial Distribution and Genotypic Diversity of Sclerotinia Sclerotiorum in Soybeans written by Tyler Mcfeaters and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: White mold (WM) in soybeans, caused by Sclerotinia sclerotium (S.s.), is the second most devastating disease of soybeans in the world. The disease causes an average of 2.5% yield loss in soybean production annually in Pennsylvania (PA), which equates to approximately $6,000,000. However, many growers still do not scout for white mold or have not been able to manage it well. My thesis aims to increase our understanding of the biology of S.s. at the field-scale, which will improve sampling strategies, crop loss estimations, and field experimental designs. Studying the genotypic diversity of S.s. populations at a field scale will help to improve management strategies like fungicide applications. The first objective of my thesis was to determine the spatial distribution of WM disease incidence and of S.s. sclerotia in the soil. My second objective was to determine if there was evidence of clonality in field-scale populations of S.s. Third, we determined if the state-scale Pennsylvania population of S.s. was clonal and compared that population to New York and Minas Gerais, Brazilian populations. Fourth, we validated the Sporecaster mobile application for use by soybean growers to forecast WM risk in the Northeast United States. Eight fields were selected for soil sampling of thirty-five quadrats. S.s. sclerotia were manually removed and isolated in the lab. DNA was extracted for 286 isolates and genotyped by fragment analysis. Microsatellite regions of the DNA were amplified at 10 loci and PCR products were analyzed by capillary electrophoresis. The same fields were also scouted to quantify the disease incidence in each quadrat. Lastly, soybean fields in PA and New York were monitored and scouted to conduct a validation of the Sporecaster mobile application for forecasting white mold risk. Across both years, the maximum number of sclerotia in a field was 3.3 sclerotia/kg soil and the maximum disease incidence for a field was 14% due to warmer and drier weather conditions at most locations. The spatial distribution of the pathogen at a field-scale was randomly distributed and only one field showed aggregation. Genotypic results indicated 83 multilocus genotypes were present across PA. Despite a high genotypic diversity, populations at a field scale were clonal and showed little evidence of outcrossing. The Sporecaster mobile application had a two-year average accuracy of 57-74% at predicting white mold disease incidence. Our increased knowledge of the pathogen and the use of the Sporecaster app will help to improve management recommendations and guide future research of white mold management tactics.
Download or read book Trichoderma written by Mohammad Manjur Shah and published by BoD – Books on Demand. This book was released on 2019-09-04 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trichoderma is a genus of fungi that are present in all soils, where they are the most prevalent culturable fungi. They are also the most successful biofungicides used in today's agriculture. These green-colored fungi are well known for their antifungal and plant-growth-stimulating effects. This book provides comprehensive information on Trichoderma and its use in medical, agricultural and industrial applications. Section I focuses mainly on identification of Trichoderma species, and Section II is concerned with Trichoderma as a biological control agent. Chapters in these sections cover topics ranging from taxonomic status and biodiversity to biochemical analysis and bio-control application.
Download or read book Sclerotinia Diseases of Crop Plants Biology Ecology and Disease Management written by G. S. Saharan and published by Springer Science & Business Media. This book was released on 2008-09-01 with total page 531 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fungus Sclerotinia has always been a fancy and interesting subject of research both for the mycologists and pathologists. More than 250 species of the fungus have been reported in different host plants all over the world that cause heavy economic losses. It was a challenge to discover weak links in the disease cycle to manage Sclerotinia diseases of large number of crops. For researchers and s- dents, it has been a matter of concern, how to access voluminous literature on Sclerotinia scattered in different journals, reviews, proceedings of symposia, workshops, books, abstracts etc. to get a comprehensive picture. With the pub- cation of book on ‘Sclerotinia’, it has now become quite clear that now only three species of Sclerotinia viz. , S. sclerotiorum, S. minor and S. trifoliorum are valid. The authors have made an excellent attempt to compile all the available infor- tion on various aspects of the fungus Sclerotinia. The information generated so far has been presented in different chapters. After introducing the subject various aspects viz. , the diseases, symptomatology, disease assessment, its distribution, economic importance, the pathogen, its taxonomy, nomenclature, reproduction, reproductive structures with fine details, variability, perpetuation, infection and pathogenesis, biochemical, molecular and physiological aspects of host-pathogen interaction, seed infection, disease cycle, epidemiology and forecasting, host resistance with sources of resistance, mechanism of resistance and other mana- ment strategies have been covered.
Download or read book Lettuce Drop written by Owen Francis Burger and published by . This book was released on 1913 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Australian Journal of Botany written by and published by . This book was released on 2003 with total page 838 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Compendium of Potato Diseases written by W. J. Hooker and published by International Potato Center. This book was released on 1981 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Disease in the absence of infectious pathogens. Genetic abnormalities. Adverse environment. Nutrient imbalance. Disease in the presence of infectious pathogens. Fungi. Viruses. Mycoplasmas. Insect toxins. Nematodes. Aphids. Seed potato certification.
Download or read book Rhizoctonia Species Taxonomy Molecular Biology Ecology Pathology and Disease Control written by B. Sneh and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 561 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rhizoctonia Species: Taxonomy, Molecular Biology, Ecology, Pathology and Control, written by the world's most reputable experts in their respective fields of Rhizoctonia research, summarizes years of research in the various aspects of the ubiquitous complex group of soil-borne fungi belonging to the anamorph genus Rhizoctonia. Species of Rhizoctonia worldwide cause economically important diseases on most of the world's important plants such as cereals, potato, cotton, sugarbeet, vegetables, ornamentals and trees in nurseries. The subject reviews covered in the book include classic as well as modern approaches to Rhizoctonia research in: Taxonomy and Evolution, Genetics and Pathogenicity, Plant-Rhizoctonia Interactions, Ecology, Population and Disease Dynamics, Disease Occurrence and Management in Various Crops, Cultural Control, Biological Control, Germplasm for Resistance, Chemical and Integrated Control Strategies. It aims to be the standard reference source book on Rhizoctonia for the next decade or more, just as Parmeter et al. (1970) has been in the past. It will be an important publication for Rhizoctonia investigators, plant pathologists, students, extension specialists, crop producers and companies dealing with plant disease control.
Download or read book Soybean written by Minobu Kasai and published by BoD – Books on Demand. This book was released on 2019-02-20 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plants are important for a permanent ecosystem, because in the ecological pyramid plants support all the other living organisms at the base. Very important organization is thought to be the integral process of resource, transport, partitioning, metabolism, and production, which involves yield, biomass, and productivity in plants. Accordingly, it is important to obtain more information about the knowledge concerning yield, biomass, and productivity in plants. Soybean is one of the main crops largely contributing to our life, which is thought to be connected to our ecosystem through the above-mentioned integral process. This book focuses on the soybean, and reviews and research concerning the yield, biomass, and productivity of soybean are presented herein. This text updates the book published in 2017. Although there are many difficulties, the main aim of this book is to present a basis for the above-mentioned integral processes of resource, transport, partitioning, metabolism, and production, which involves yield, biomass, and productivity in plants (soybean), and to understand what supports this basis and the integral process. It is hoped that this and the preceding book will be essential reads.
Download or read book Diseases Pests and Disorders of Potatoes written by Stuart J. Wale and published by Elsevier. This book was released on 2008 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering the most important pathogens of potatoes, this handbook provides clear, concise descriptions of the symptoms and cycles of diseases. It also provides detail on the distribution, economic importance, and advice on the control. Illustrated with over 250 color photographs of affected crops, pest profiles and detailed characteristics of common prey to potato crops, this book is the ultimate aid to the rapid identification and control of disease for this important crop. * Coverage includes identifcation, disease cycle, economic importance, and control * Problem-oriented organization * Over 250 color illustrations; full color * Field guide practicality
Download or read book Genomics of Plant Associated Fungi and Oomycetes Dicot Pathogens written by Ralph A. Dean and published by Springer. This book was released on 2014-08-22 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes how genomics has revolutionized our understanding of agriculturally important plant-associated fungi and oomycetes. It illustrates some fundamental discoveries about these eukaryotic microbes with regard to the overall structure of their genomes, their lifestyles and the molecular mechanisms that form the basis of their interactions with plants. Genomics has provided new insights into fungal lifestyles and led to practical advances in plant breeding and crop protection, such as predictions about the spread and evolution of new pathogens. This volume focuses on fungi and oomycetes that are typical dicot plant pathogens and includes: Sclerotinia sclerotiorum, Botrytis cinerea, Alternaria sp.,Verticillium alfalfae and Verticillium dahliae, Fusarium oxysporum, Phytophthora capsici, Phytophthora sojae, Phytophthora ramorum, Phytophthora infestans, Hyaloperonospora arabidopsidis.
Download or read book Genetics and Genomics of Soybean written by Gary Stacey and published by Springer Science & Business Media. This book was released on 2008-05-07 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean genomics is of great interest as one of the most economically important crops and a major food source. This book covers recent advances in soybean genome research, including classical, RFLP, SSR, and SNP markers; genomic and cDNA libraries; functional genomics platforms; genetic and physical maps; and gene expression profiles. The book is for researchers and students in plant genetics and genomics, plant biology and pathology, agronomy, and food sciences.
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1990 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mycology Guidebook written by Mycological Society of America. Mycology Guidebook Committee and published by . This book was released on 1974 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crop ecology cultivation and uses of cactus pear written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2018-06-05 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cactus plants are precious natural resources that provide nutritious food for people and livestock, especially in dryland areas. Originally published in 1995, this extensively revised edition provides fresh insights into the cactus plant’s genetic resources, physiological traits, soil preferences and vulnerability to pests. It provides invaluable guidance on managing the resource to support food security and offers tips on how to exploit the plant’s culinary qualities.
Download or read book Crop Rotation on Organic Farms written by Charles L. Mohler and published by Natural Resource Agriculture and Engineering Service (Nraes). This book was released on 2009 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1991 with total page 1810 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Techniques in Plant Disease Epidemiology written by Jürgen Kranz and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most books on epidemiology have treated the subject from a statistical, mathematical or computer applicational point of view. However, experiments must be performed first to provide the data for models which in turn can then be proven by further experimentation. This mutual interplay of theory and empirics gives epidemiology its scientific thrust and charm. This book provides a choice of methods for varying applications and objectives, covering all important aspects for the designing of experiments. Furthermore, the reader is supplied with solutions to his experimental problems and many "tricks of the trade". The newcomer to the field will also profit by this methodology guide.
