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Effects Of Glyphosate On Weed Management And Reproductive Biology Of Glyphosate Resistant Corn
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Book Synopsis Effects of Glyphosate on Weed Management and Reproductive Biology of Glyphosate-resistant Corn by : Walter Edward Thomas
Download or read book Effects of Glyphosate on Weed Management and Reproductive Biology of Glyphosate-resistant Corn written by Walter Edward Thomas and published by . This book was released on 2003 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: corn, sicklepod, glyphosate, cotton, pollen viability.
Book Synopsis Effects of Glyphosate on Weed Management and Reproductive Biology of Glyphosate-Resistant Corn by :
Download or read book Effects of Glyphosate on Weed Management and Reproductive Biology of Glyphosate-Resistant Corn written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Field studies were conducted from 2000 to 2002 to evaluate crop tolerance, weed control, grain yield, and net returns in glyphosate-resistant corn with various herbicide systems. Weed management systems evaluated various preemergence (PRE) and postemergence (POST) herbicide options. Glyphosate formulations did not influence crop injury, weed control, or grain yield in either study. Effective annual grass control was not achieved with any PRE herbicide system. However, PRE herbicide treatment plus any glyphosate treatment controlled goosegrass, large crabgrass, and Texas panicum> 86%. Regardless of PRE herbicide options, any POST glyphosate treatment controlled common ragweed and common lambsquarters at least 88 and 89%, respectively. Ipomoea spp. were controlled at least 88% with a PRE herbicide fb glyphosate EPOST alone, glyphosate sequentially, or in EPOST mixture with either halosulfuron or mesotrione. The highest yielding herbicide systems used glyphosate applied once or twice. Net returns were highest for glyphosate weed management systems. Experiments conducted in the North Carolina State University Phytotron greenhouse and three field locations in 2002 determined the effect of 1.12 kg ai/ha of glyphosate at various application timings on pollen viability and seed set in two types (GA21 and NK603) of glyphosate-resistant corn. Regardless of hybrid, pollen viability was reduced in phytotron and field studies with glyphosate treatments applied POST at the V6 stage or later. Scanning and transmission electron microscopy indicated distinct morphological alterations and large vacuoles and lower starch accumulation associated with later glyphosate treatments that caused pollen viability reductions. Although glyphosate negatively influenced pollen viability, pollination and seed set were not influenced. Enzyme-linked immunoabsorbent assay examined CP4-EPSPS expression in DKC 64-10 (NK603) at anthesis and showed the greatest amount in pollen with progressively less i.
Book Synopsis Glyphosate Resistance in Crops and Weeds by : Vijay K. Nandula
Download or read book Glyphosate Resistance in Crops and Weeds written by Vijay K. Nandula and published by John Wiley & Sons. This book was released on 2010-12-28 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: New technologies are becoming available for managing glyphosate resistant (GR) weeds and reducing their spread. GR crop technology has revolutionized crop production in the developed world and the benefits are gradually spilling over to the developing world. In order to sustain an effective, environmentally safe herbicide such as glyphosate and the GR crop technology well in to the future, it is imperative that the issue of GR weeds be comprehensively understood. This book provides such an essential, up-to-date source of information on glyphosate resistance for researchers, extension workers, land managers, government personnel, and other decision makers. Provides comprehensive coverage of the intensely studied topic of glyphosate resistant (GR) in crops Details the development of glyphosate resistance and how to detect and manage the problem in crops Helps standardize global approaches to glyphosate resistance Encompasses interdisciplinary approaches in chemistry, weed science, biochemistry, plant physiology, plant biotechnology, genetics, ecology Includes a chapter on economic analysis of GR impact on crops
Book Synopsis The Economics of Glyphosate Resistance Management in Corn and Soybean Production by : Michael Livingston
Download or read book The Economics of Glyphosate Resistance Management in Corn and Soybean Production written by Michael Livingston and published by CreateSpace. This book was released on 2015-05-21 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glyphosate, known by many trade names, including Roundup, is a highly effective herbicide. Widespread glyphosate use for corn and soybean has led to glyphosate resistance, which is now documented in 14 weed species affecting U.S. cropland, and recent surveys suggest that acreage with glyphosate-resistant (GR) weeds is expanding. Data from USDA's Agricultural Resource Management Survey (ARMS), along with the Benchmark Study (conducted independently by plant scientists), are used to address several issues raised by the spread of GR weeds. Choices made by growers that could help manage glyphosate resistance include using glyphosate during fewer years, combining it with one or more alternative herbicides, and, most importantly, not applying glyphosate during consecutive growing seasons. As a result, managing glyphosate resistance is more cost effective than ignoring it, and after about 2 years, the cumulative impact of the returns received is higher when managing instead of ignoring resistance.
Book Synopsis The Economics of Glyphosate Resistance Management in Corn and Soybean Production by : Michael J. Livingston
Download or read book The Economics of Glyphosate Resistance Management in Corn and Soybean Production written by Michael J. Livingston and published by . This book was released on 2015 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glyphosate, known by many trade names, including Roundup, is a highly effective herbicide. Widespread glyphosate use for corn and soybean has led to glyphosate resistance, which is now documented in 14 weed species affecting U.S. cropland, and recent surveys suggest that acreage with glyphosate-resistant (GR) weeds is expanding. Data from USDA's Agricultural Resource Management Survey (ARMS), along with the Benchmark Study (conducted independently by plant scientists), are used to address several issues raised by the spread of GR weeds. Choices made by growers that could help manage glyphosate resistance include using glyphosate during fewer years, combining it with one or more alternative herbicides, and, most importantly, not applying glyphosate during consecutive growing seasons. As a result, managing glyphosate resistance is more cost effective than ignoring it, and after about 2 years, the cumulative impact of the returns received is higher when managing instead of ignoring resistance.
Book Synopsis Herbicide-Resistant Crops by : Stephen O. Duke
Download or read book Herbicide-Resistant Crops written by Stephen O. Duke and published by CRC Press. This book was released on 2018-01-18 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edited by a recognized leader in the field, Herbicide-Resistant Crops is the first book to cover all of the issues related to the controversial topic of herbicide-resistant crops. It provides extensive discussions of the modern biotechnological methods that have been used to develop such crops, and reviews the implications - both positive and negative - of developing crops that are resistant to herbicides. The creation and anticipated applications of specific herbicide-resistant crops are also discussed. In addition, the book covers the potential impact of herbicide-resistant crops on weed management practices and the environment, and presents issues related to the regulation and economics of these crops. The editor has brought together a diverse group of professionals, representing the several distinct areas impacted by the new technology of herbicide-resistant crops. The wide range of viewpoints presented in this book creates a balanced and complete survey, providing a notable contribution to the literature.
Book Synopsis A History of Weed Science in the United States by : Robert L Zimdahl
Download or read book A History of Weed Science in the United States written by Robert L Zimdahl and published by Elsevier. This book was released on 2010-02-04 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is important that scientists think about and know their history - where they came from, what they have accomplished, and how these may affect the future. Weed scientists, similar to scientists in many technological disciplines, have not sought historical reflection. The technological world asks for results and for progress. Achievement is important not, in general, the road that leads to achievement. What was new yesterday is routine today, and what is described as revolutionary today may be considered antiquated tomorrow. Weed science has been strongly influenced by technology developed by supporting industries, subsequently employed in research and, ultimately, used by farmers and crop growers. The science has focused on results and progress. Scientists have been--and the majority remain--problem solvers whose solutions have evolved as rapidly as have the new weed problems needing solutions. In a more formal sense, weed scientists have been adherents of the instrumental ideology of modern science. That is an analysis of their work, and their orientation reveals the strong emphasis on practical, useful knowledge; on know how. The opposite, and frequently complementary orientation, that has been missing from weed science is an emphasis on contemplative knowledge; that is, knowing why. This book expands on and analyzes how these orientations have affected weed science’s development. The first analytical history of weed science to be written Compares the development of weed science, entomology and plant pathology Identifies the primary founders of weed science and describes their role
Book Synopsis Pesticides Industry Sales and Usage by : Arnold Lyle Aspelin
Download or read book Pesticides Industry Sales and Usage written by Arnold Lyle Aspelin and published by . This book was released on 1997 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biology and Management of Problematic Crop Weed Species by : Bhagirath Chauhan
Download or read book Biology and Management of Problematic Crop Weed Species written by Bhagirath Chauhan and published by Elsevier. This book was released on 2021-09-04 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: Weeds are the main biological constraint to crop production throughout the year. Uncontrolled weeds could cause 100% yield loss. In Australia, the overall cost of weeds to Australian grain growers was estimated at AU$ 3.3 billion annually. In terms of yield losses, weeds amounted to 2.7 million tonnes of grains at a national level. In the USA, weeds cost US$ 33 billion in lost crop production annually. In India, these costs were estimated to be much higher (US$ 11 billion). These studies from different economies suggest that weeds cause substantial yield and economic loss. Biology and Management of Problematic Weed Species details the biology of key weed species, providing vital information on seed germination and production, as well as factors affecting weed growth. These species include Chenopodium album, Chloris truncata and C. virgate, Conyza bonariensis and C. canadensis, Cyperus rotundus, and many more. This information is crucial for researchers and growers to develop integrated weed management (IWM) strategies. Written by leading experts across the globe, this book is an essential read to plant biologists and ecologists, crop scientists, and students and researchers interested in weed science. Provides detailed information on the biology of different key weed species Covers weed seed germination and emergence Presents the factors affecting weed growth and seed production
Book Synopsis Sittig's Handbook of Pesticides and Agricultural Chemicals by : Richard P. Pohanish
Download or read book Sittig's Handbook of Pesticides and Agricultural Chemicals written by Richard P. Pohanish and published by William Andrew. This book was released on 2014-09-06 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference handbook provides fully updated chemical, regulatory, health, and safety information on nearly 800 pesticides and other agricultural chemicals. The clear, consistent and comprehensive presentation of information makes Sittig's an essential reference for a wide audience including first responders, environmental and industrial health/safety professionals, the food industry, the agricultural sector and toxicologists. Detailed profiles are provided for each substance listed, including: usage; crop-specific residue limits; hazard ratings for long-term human toxicity; and endocrine disruptor and reproductive toxicity information. Every chemical profile contains references and web links to source information from the EPA, OSHA, the World Health Organization (WHO), and other important advisory and lawmaking bodies. This work is focused on regulated chemicals. The substances covered include pesticides, insecticides, herbicides, fungicides, rodenticides and related agricultural chemicals used on foods grown and produced for both human and animal consumption. These products are organized with common names, chemical synonyms, trade names, chemical formulae, US EPA pesticide codes, EU regulations including Hazard Symbol and Risk Phrases, EINECS, RTECS, CAS, and other unique identifiers so that all who may have contact with, or interest in them can find needed information quickly. A comprehensive reference for the agricultural sector, food industry, agrochemical manufacturing and distribution sector, and first responders Brings together a wealth of hazard and response, regulatory and toxicological information in one convenient go-to handbook Covers US, EU and worldwide regulatory requirements
Book Synopsis Plant Biochemistry by : Hans-Walter Heldt
Download or read book Plant Biochemistry written by Hans-Walter Heldt and published by Academic Press. This book was released on 2005 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1 A Leaf Cell Consists of Several Metabolic Compartments 2 The Use of Energy from Sunlight by Photosynthesis is the Basis of Life on Earth 3 Photosynthesis is an Electron Transport Process 4 ATP is Generated by Photosynthesis 5 Mitochondria are the Power Station of the Cell 6 The Calvin Cycle Catalyzes Photosynthetic CO2 Assimilation 7 In the Photorespiratory Pathway Phosphoglycolate Formed by the Oxygenase Activity of RubisCo is Recycled 8 Photosynthesis Implies the Consumption of Water 9 Polysaccharides are Storage and Transport Forms of Carbohydrates Produced by Photosynthesis 10Nitrate Assimilation is Essential for the Synthesis of Organic Matter 11 Nitrogen Fixation Enables the Nitrogen in the Air to be Used for Plant Growth 12 Sulfate Assimilation Enables the Synthesis of Sulfur Containing Substances 13 Phloem Transport Distributes Photoassimilates to the Various Sites of Consumption and Storage 14 Products of Nitrate Assimilation are Deposited in Plants as Storage Proteins 15 Glycerolipids are Membrane Constituents and Function as Carbon Stores 16 Secondary Metabolites Fulfill Specific Ecological Functions in Plants 17 Large Diversity of Isoprenoids has Multiple Funtions in Plant Metabolism 18 Phenylpropanoids Comprise a Multitude of Plant Secondary Metabolites and Cell Wall Components 19 Multiple Signals Regulate the Growth and Development of Plant Organs and Enable Their Adaptation to Environmental Conditions 20 A Plant Cell has Three Different Genomes 21 Protein Biosynthesis Occurs at Different Sites of a Cell 22 Gene Technology Makes it Possible to Alter Plants to Meet Requirements of Agriculture, Nutrition, and Industry.
Book Synopsis The Economics of Glyphosate Resistance Management in Corn and Soybean Production by : United States Department of Agriculture
Download or read book The Economics of Glyphosate Resistance Management in Corn and Soybean Production written by United States Department of Agriculture and published by CreateSpace. This book was released on 2015-07-08 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glyphosate, known by many trade names, including Roundup, is a highly effective herbicide. Widespread glyphosate use for corn and soybean has led to glyphosate resistance, which is now documented in 14 weed species affecting U.S. cropland, and recent surveys suggest that acreage with glyphosate-resistant (GR) weeds is expanding. Data from USDA's Agricultural Resource Management Survey (ARMS), along with the Benchmark Study (conducted independently by plant scientists), are used to address several issues raised by the spread of GR weeds. Choices made by growers that could help manage glyphosate resistance include using glyphosate during fewer years, combining it with one or more alternative herbicides, and, most importantly, not applying glyphosate during consecutive growing seasons. As a result, managing glyphosate resistance is more cost effective than ignoring it, and after about 2 years, the cumulative impact of the returns received is higher when managing instead of ignoring resistance.
Author :National Academies of Sciences, Engineering, and Medicine Publisher :National Academies Press ISBN 13 :0309437385 Total Pages :607 pages Book Rating :4.3/5 (94 download)
Book Synopsis Genetically Engineered Crops by : National Academies of Sciences, Engineering, and Medicine
Download or read book Genetically Engineered Crops written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2017-01-28 with total page 607 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genetically engineered (GE) crops were first introduced commercially in the 1990s. After two decades of production, some groups and individuals remain critical of the technology based on their concerns about possible adverse effects on human health, the environment, and ethical considerations. At the same time, others are concerned that the technology is not reaching its potential to improve human health and the environment because of stringent regulations and reduced public funding to develop products offering more benefits to society. While the debate about these and other questions related to the genetic engineering techniques of the first 20 years goes on, emerging genetic-engineering technologies are adding new complexities to the conversation. Genetically Engineered Crops builds on previous related Academies reports published between 1987 and 2010 by undertaking a retrospective examination of the purported positive and adverse effects of GE crops and to anticipate what emerging genetic-engineering technologies hold for the future. This report indicates where there are uncertainties about the economic, agronomic, health, safety, or other impacts of GE crops and food, and makes recommendations to fill gaps in safety assessments, increase regulatory clarity, and improve innovations in and access to GE technology.
Book Synopsis Ecological Management of Agricultural Weeds by : Matt Liebman
Download or read book Ecological Management of Agricultural Weeds written by Matt Liebman and published by Cambridge University Press. This book was released on 2001-07-19 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents principles and practices for ecologically based weed management in a wide range of temperate and tropical farming systems. Special attention is given to the evolutionary challenges that weeds pose and the roles that farmers can play in the development of new weed-management strategies.
Book Synopsis Biology and Control of Glyphosate-resistant Giant Ragweed by : Simranpreet Kaur
Download or read book Biology and Control of Glyphosate-resistant Giant Ragweed written by Simranpreet Kaur and published by . This book was released on 2015 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Giant ragweed is a troublesome, early emerging, summer annual weed found throughout the eastern and midwestern corn and soybean growing regions of the United States. Since the emergence of giant ragweed varies at different locations, our first objective was to determine the emergence pattern of giant ragweed in Nebraska and how spring tillage influences emergence. Results of a two-year study suggested that giant ragweed emerged from late March until mid-June, with the majority of emergence ceasing by early May. Spring tillage could be used as an alternative method for managing glyphosate resistant giant ragweed. Water stress can affect the growth and development of both crop plants and weeds. Thus, in our second objective, we hypothesized that drought conditions can result in a water deficit that can hinder giant ragweed growth and reproduction. Results suggested that the degree of water stress had more effect on plant growth and fecundity compared to the duration of water stress. Plants watered at a 10-day interval with 100% field capacity were still able to produce seeds, whereas only a few plants survived at 12.5% soil moisture content when irrigated at a 2-day interval. Early emergence and a rapid growth rate make giant ragweed a competitive weed early in the season and reduce crop yields; therefore, in our third objective, we determined the early spring control of giant ragweed using a preplant herbicide. Several herbicide programs were investigated with preplant followed by pre-emergence (PRE) and post-emergence (POST) herbicides for controlling glyphosate-resistant giant ragweed in glufosinate-resistant soybean. Results suggested that herbicide programs containing 2,4-D in preplant followed by an in-crop application of glufosinate provided 99% control of glyphosate-resistant giant ragweed and increased soybean yields. Finally, since fall and early spring application of herbicides may influence giant ragweed emergence, our fourth objective was to determine the effect of fall and/or early spring application of a prepackaged mixture of iodosulfuron and thiencarbazone-methyl applied alone or tank-mixed with 2,4-D, dicamba, or metribuzin on glyphosate-resistant giant ragweed in no-till corn. Results suggested that the premix of iodosulfuron and thiencarbazone-methyl tank-mixed with 2,4-D, dicamba, or metribuzin followed by PRE and POST herbicide applications provided > 95% control of glyphosate-resistant giant ragweed in no-till corn.
Book Synopsis Weed Management Strategies in Glyphosate-resistant Crops by : Shannon Michelle Oltmans
Download or read book Weed Management Strategies in Glyphosate-resistant Crops written by Shannon Michelle Oltmans and published by . This book was released on 2002 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Weed and Crop Resistance to Herbicides by : Rafael de Prado
Download or read book Weed and Crop Resistance to Herbicides written by Rafael de Prado and published by Springer Science & Business Media. This book was released on 1997-05-31 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent decades, repeated use of herbicides in the same field has imposed selection for resistance in species that were formerly susceptible. On the other hand, considerable research in the private and public sectors has been directed towards introducing herbicide tolerance into susceptible crop species. The evolution of herbicide resistance, understanding its mechanisms, characterisation of resistant weed biotypes, development of herbicide-tolerant crops and management of resistant weeds are described throughout the 36 chapters of this book. It has been written by leading researchers based on the contributions made at the International Symposium on Weed and Crop Resistance to Herbicides held at Córdoba, Spain. This book will be a good reference source for research scientists and advanced students.
