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Weed Science in the Tropics by I. Okezie Akobundu Pdf
Excessive weed growth is one of the most serious problems facing farmers throughout the tropics. There is a need for professionally trained weed scientists to become involved in research at the highest level, where existing technologies can be further developed and new ones generated.
Weeds hold an enigmatic and sometimes-controversial place in agriculture, where they are generally reviled, grudgingly tolerated, and occasionally admired. In most cases, growers make considerable effort to reduce the negative economic impact of weeds because they compete with crops for resources and hinder field operations, thereby affecting crop productivity and quality, and ultimately the sustainability of agriculture. Weed control in production agriculture is commonly achieved through the integration of chemical, biological, and mechanical management methods. Chemicals (herbicides) usually inhibit the growth and establishment of weed plants by interfering with various physiological and biochemical pathways. Biological methods include crop competition, smother crops, rotation crops, and allelopathy, as well as specific insect predators and plant pathogens. Mechanical methods encompass an array of tools from short handled hoes to sophisticated video-guided robotic machines. Integrating these technologies, in order to relieve the negative impacts of weeds on crop production in a way that allows growers to optimize profits and preserve human health and the environment, is the science of weed management.
Thomas J. Monaco,Stephen C. Weller,Floyd M. Ashton
Author : Thomas J. Monaco,Stephen C. Weller,Floyd M. Ashton Publisher : John Wiley & Sons Page : 688 pages File Size : 41,5 Mb Release : 2002-05-23 Category : Technology & Engineering ISBN : 9780471274964
Weed Science by Thomas J. Monaco,Stephen C. Weller,Floyd M. Ashton Pdf
The updated edition of the classic, fundamental book on weedscience Weed Science provides a detailed examination ofthe principles of integrated weed management with important detailson how chemical herbicides work and should be used. This revisedFourth Edition addresses recent developments affecting weedscience. These include the increased use of conservation-tillagesystems, environmental concerns about the runoff of agrochemicals,soil conservation, crop biotechnology, resistance of weeds andcrops to herbicides, weed control in nonagricultural settings andconcerns regarding invasive plants, wetland restoration, and theneed for a vastly improved understanding of weed ecology. Current management practices are covered along with guidance forselecting herbicides and using them effectively. To serve as a moreefficient reference, herbicides are cross-listed by chemical andbrand name and grouped by mechanism of action and physiologicaleffect rather than chemical structure. In addition, an introductionto organic chemistry has been added to familiarize readers withorganic herbicides. Also included are guidelines on weed-controlpractices for specific crops or situations, such as small grains,row crops, horticultural crops, lawns and turf, range land, brush,and aquatic plant life. Generously supplemented with 300 drawings, photographs, andtables, Weed Science is an essential book for students taking anintroductory course in weed science, as well as a reference foragricultural advisors, county agents, extension specialists, andprofessionals throughout the agrochemical industry.
Weed Management in the Humid and Sub-humid Tropics by P. J. van Rijn Pdf
The abundant weed growth in the humid and sub-humid tropics is one of the most serious constraints in producing crops, establishing pastures and maintaining water resources. This book presents historic and recent data on the biology of weeds and their control, within the general context of the husbandry of crops and the management of pastures and aquatic situations. The first seven chapters cover the nature of negative values of weeds, principles of weed ecology, weed control and establishment of farming and cropping systems in tropical regions, performance of crops in the tropical ecosystems, main weeds in the forest regions, and main weeds in the savannah regions. Chapter 8 deals with weed control methods in general and chapters 9 to 14 with weed control in various crops. Chapter 15 covers weeds and their control in pastures, and chapter 16 aquatic weed management.
Author : F. W. G. Baker,P. J. Terry Publisher : Cab Publishing Page : 232 pages File Size : 40,5 Mb Release : 1991 Category : Cyperaceae ISBN : WISC:89037118676
Tropical Grassy Weeds by F. W. G. Baker,P. J. Terry Pdf
Weeds are the cause of great losses to crop production in the tropics and grassy weeds present a particular problem because of their similarity to cereal crop plants. It is therefore difficult to devise control methods and management practices appropriate for such weeds. This book reviews our current knowledge of this subject and is the outcome of a workshop on integrated control of grassy weeds in tropical subsistence farming systems, held in Nairobi in February 1990. The workshop was organised by CASAFA (Commission on the Application of Science to Agriculture, Forestry and Aquaculture) of the International Council of Scientific Unions. The contents include a general review of grassy weeds, their physiology in tropical agriculture, management by biological and chemical control, integrated weed management, control in tropical cereals, in tropical grasslands and forage crops, in mixed crops and in upland rice, and overviews of grassy weeds in Kenya, the Phillipines and Australia.
This grossly updated fourth edition of Modern Weed Management is a unique review of the sample material that reflects the fast emerging issues in weed science research eg, concerns about our environmental safety in the use of herbicides; the changing patterns of weed species dominance; the development of herbicide resistance in races within the weed species; genetic engineering leading to purposeful induction of herbicides resistance in crops; and the like. What sets this book apart from the other valuable ones on the subject is the fact that the entire research and development pathway is presented in an orderly manner, with proper brevity.
Weed Science and Weed Management in Rice and Cereal-Based Cropping Systems, 2 Volumes by Aurora M. Baltazar,Surajit K. De Datta Pdf
The book presents discussions on: Biology and ecology of major troublesome weeds infesting rice, wheat, corn, soybean, focusing on different cropping patterns in both tropical and temperate cropping systems and science-based weed management practices involving chemical, non-chemical, biological, integrated methods. Herbicides used, with their most recent classification, identification of new target sites, mechanisms and modes of action and how and why weeds evolve resistance to herbicides. New concepts, new paradigms and new technologies to manage evolution of resistance to herbicides including weed genomics, bioherbicides and allelochemicals. Highly recommended for students, teachers, researchers, agronomists, horticulturists, crop physiologists, and crop protection specialists in tropical and temperate agricultural systems, particularly in areas where major tropical weeds are posing potential threats to temperate agricultural systems.
Fundamentals of Weed Science by Robert L Zimdahl Pdf
Fundamentals of Weed Science, Fifth Edition, provides the latest information on this constantly advancing area of study. Placing weed management in the largest context of weed research and science, the book presents the latest advances in the role, control and potential uses of weed plants. From the emergence and genetic foundation of weeds, to the latest means of control and environmental impact, the book uses an ecological framework to explore the role of responsible and effective weed control in agriculture. In addition, users will find discussions of related areas where research is needed for additional understanding. Explored topics include the roles of culture, economics and politics in weed management, all areas that enable scientists and students to further understand the larger effects on society. Winner of a 2019 The William Holmes McGuffey Longevity Award (College) (Texty) from the Textbook Association of America Completely revised with 35% new content Contains expanded coverage of ethnobotany, the specific identity and role of invasive weed species, organic agriculture, and herbicide resistance in GM crops Includes an emphasis on herbicide resistance and molecular biology, both of which have come to dominate weed science research Covers all traditional aspects of weed science as well as current research Provides broad coverage, including relevant related subjects like weed ecology and weed population genetics
Biological Control of Tropical Weeds Using Arthropods by Rangaswamy Muniappan,Gadi V. P. Reddy,Anantanarayanan Raman Pdf
Weeds are a major constraint to agricultural production, particularly in the developing world. Cost-efficient biological control is a self-sustaining way to reduce this problem, and produces fewer non-target effects than chemical methods, which can cause serious damage to the environment. This book covers the origin, distribution, and ecology of twenty model invasive weed species, which occur in habitats from tropical to temperate to aquatic. Sustainable biological control of each weed using one or more arthropods is discussed. The aim is to provide ecological management models for use across the tropical world, and to assist in the assessment of potential risks to native and economic plants. This is a valuable resource for scientists and policy makers concerned with the biological control of invasive tropical plants.
Weed Ecology by Steven R. Radosevich,Jodie S. Holt,Claudio Ghersa Pdf
Weeds are successful plants, but on their own terms. Looking at weeds from an ecological viewpoint, emphasising the way in which one species interacts with others, the authors show that weeds are questionable mainly in that they are out-of-place.
Ecological Management of Agricultural Weeds by Matt Liebman,Charles L. Mohler,Charles P. Staver Pdf
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.
