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Author: Bhagirath Chauhan Publisher: Elsevier ISBN: 0128229357 Category : Science Languages : en Pages : 433
Book Description
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
Author: James C. Delouche Publisher: Food & Agriculture Org. ISBN: 9789251056769 Category : Nature Languages : en Pages : 168
Book Description
Drawing on literature reviews from ongoing unpublished research, research reports and symposia carried out on various aspects of the importance, ecology, biology and control of weedy rices, this publication also highlights global economic and environmental problems created by weedy rices, including red rice types.
Author: Duncan A. Vaughan Publisher: Int. Rice Res. Inst. ISBN: 9712200574 Category : Oryza Languages : en Pages : 148
Book Description
The relationshup between Oryza and other grasses; Species relationships within the genus Oryza; Nemenclature of Oryza species; The evaluation and uses of wild rices; Use of wild rices for evaluation, breeding, or experimental purposes; Choosing wild rice germplasm for evaluation and plant breeding; Sources of wild rice seeds, their germination, and culture; Areas of future endeavor; Oryza species descriptions; O.alta, O. australiensis; O. barthii; O. brachyantha; O. glaberrima; O. grandiglumis; O.latifolia; O. longiglumis; O.meridionalis; O. minuta; O. nivara; O officinalis; O. punctata; O. rhizomatis; O. ridleyi; O. rufipogon; O sativa; Oschlechteri; Genera related to Oryza; Sources of information for species descriptions.
Author: Inderjit Publisher: Springer Science & Business Media ISBN: 9401705526 Category : Science Languages : en Pages : 550
Book Description
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.