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Author: Matthew Underwood Publisher: ISBN: Category : Languages : en Pages :
Book Description
Prior to the launch of Roundup Ready Xtend soybean, a genetically modified soybean with transgenes that express resistance to glyphosate and dicamba, several knowledge gaps existed regarding weed control, tank-mix compatibility, profitability, and environmental impact. The addition of dicamba (300 or 600 g ae ha-1) to quizalofop-p-ethyl (24, 30, or 36 g ai ha-1) or clethodim (30, 37.5 or 45 g ai ha-1), applied postemergence (POST), reduced the control of glyphosate-resistant volunteer corn by 11 to 20%, however, the antagonism could be overcome by increasing the rate of graminicide 25-50%. The addition of dicamba (600 g ae ha-1) to glyphosate (900 g ae ha-1), applied POST, increased broadleaf weed control by 3 to 14% 8 weeks after application (WAA). Dicamba, applied POST, provided poor control of grasses resulting in soybean seed yield loss of 30 to 33% compared to dicamba plus glyphosate. When applied preemergence (PRE) in a conventional tillage production system, dicamba (600 g ae ha-1) provided similar control of annual broadleaf weeds compared to several industry standards. Dicamba provided poorer broadleaf weeds in no-till production systems than several pre-plant (PP) herbicides which provided good to excellent control of broadleaf and grass weed species. The reduced broadleaf weed control with dicamba was likely due to the short residual activity in the soil.
Author: Matthew Underwood Publisher: ISBN: Category : Languages : en Pages :
Book Description
Prior to the launch of Roundup Ready Xtend soybean, a genetically modified soybean with transgenes that express resistance to glyphosate and dicamba, several knowledge gaps existed regarding weed control, tank-mix compatibility, profitability, and environmental impact. The addition of dicamba (300 or 600 g ae ha-1) to quizalofop-p-ethyl (24, 30, or 36 g ai ha-1) or clethodim (30, 37.5 or 45 g ai ha-1), applied postemergence (POST), reduced the control of glyphosate-resistant volunteer corn by 11 to 20%, however, the antagonism could be overcome by increasing the rate of graminicide 25-50%. The addition of dicamba (600 g ae ha-1) to glyphosate (900 g ae ha-1), applied POST, increased broadleaf weed control by 3 to 14% 8 weeks after application (WAA). Dicamba, applied POST, provided poor control of grasses resulting in soybean seed yield loss of 30 to 33% compared to dicamba plus glyphosate. When applied preemergence (PRE) in a conventional tillage production system, dicamba (600 g ae ha-1) provided similar control of annual broadleaf weeds compared to several industry standards. Dicamba provided poorer broadleaf weeds in no-till production systems than several pre-plant (PP) herbicides which provided good to excellent control of broadleaf and grass weed species. The reduced broadleaf weed control with dicamba was likely due to the short residual activity in the soil.
Author: National Academies of Sciences, Engineering, and Medicine Publisher: National Academies Press ISBN: 0309437385 Category : Science Languages : en Pages : 607
Book Description
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.
Author: Andy Clark Publisher: DIANE Publishing ISBN: 1437903797 Category : Technology & Engineering Languages : en Pages : 248
Book Description
Cover crops slow erosion, improve soil, smother weeds, enhance nutrient and moisture availability, help control many pests and bring a host of other benefits to your farm. At the same time, they can reduce costs, increase profits and even create new sources of income. You¿ll reap dividends on your cover crop investments for years, since their benefits accumulate over the long term. This book will help you find which ones are right for you. Captures farmer and other research results from the past ten years. The authors verified the info. from the 2nd ed., added new results and updated farmer profiles and research data, and added 2 chap. Includes maps and charts, detailed narratives about individual cover crop species, and chap. about aspects of cover cropping.
Author: John E. Franz Publisher: ISBN: Category : Language Arts & Disciplines Languages : en Pages : 688
Book Description
Glyphosate is a popular global post-emergent perennial herbicide. This volume is a comprehensive review of glyphosate's history, properties, chemistry, biology, formulation, technology, enzymology, and structure/activity relationship. The discussion covers glyphosate's unique environmental properties, broad range of application, soil inactivity, soil and plant metabolism, low toxicity, and uptake and transport in plants. It also covers the syntheses of hundreds of analogs and derivatives and clarifies glyphosate's molecular mode of action and its effect on the target enzyme EPSP synthase.
Author: Rafael de Prado Publisher: Springer Science & Business Media ISBN: 9780792345817 Category : Science Languages : en Pages : 366
Book Description
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.
Author: Mahesh K. Upadhyaya Publisher: CABI ISBN: 1845932900 Category : Technology & Engineering Languages : en Pages : 249
Book Description
This book deals with the principles, concepts, technology, potential, limitations and impacts of various non-chemical weed management options. It contains 12 chapters discussing topics on prevention strategies in weed management, exploitation of weed crop interactions to manage weed problems, cultural methods, cover crops, allelopathy, classical biological control using phytophagous arthropods, bioherbicides (such as mycoherbicides), mechanical weed control, non-living mulches, thermal weed control and soil solarization.
Author: Christian Ritz Publisher: CRC Press ISBN: 1351981048 Category : Mathematics Languages : en Pages : 227
Book Description
Nowadays the term dose-response is used in many different contexts and many different scientific disciplines including agriculture, biochemistry, chemistry, environmental sciences, genetics, pharmacology, plant sciences, toxicology, and zoology. In the 1940 and 1950s, dose-response analysis was intimately linked to evaluation of toxicity in terms of binary responses, such as immobility and mortality, with a limited number of doses of a toxic compound being compared to a control group (dose 0). Later, dose-response analysis has been extended to other types of data and to more complex experimental designs. Moreover, estimation of model parameters has undergone a dramatic change, from struggling with cumbersome manual operations and transformations with pen and paper to rapid calculations on any laptop. Advances in statistical software have fueled this development. Key Features: Provides a practical and comprehensive overview of dose-response analysis. Includes numerous real data examples to illustrate the methodology. R code is integrated into the text to give guidance on applying the methods. Written with minimal mathematics to be suitable for practitioners. Includes code and datasets on the book’s GitHub: https://github.com/DoseResponse. This book focuses on estimation and interpretation of entirely parametric nonlinear dose-response models using the powerful statistical environment R. Specifically, this book introduces dose-response analysis of continuous, binomial, count, multinomial, and event-time dose-response data. The statistical models used are partly special cases, partly extensions of nonlinear regression models, generalized linear and nonlinear regression models, and nonlinear mixed-effects models (for hierarchical dose-response data). Both simple and complex dose-response experiments will be analyzed.
Author: Publisher: ISBN: Category : Agricultural biotechnology Languages : en Pages : 202
Book Description
This review supports the conclusion that overall the currently commercialized biotechnology-derived soybean, corn, and cotton crops yield environmental benefits. Furthermore, a critical analysis of the literature supports the idea that biotechnology-derived soybean, corn, and cotton pose no environmental concerns unique to or different from those historically associated with conventionally developed crop varieties.
Author: Matthew Underwood
Author: Matthew Underwood
Author: National Academies of Sciences, Engineering, and Medicine
Author: Andy Clark
Author: John E. Franz
Author: Rafael de Prado
Author: Christian Ritz
Author: Mahesh K. Upadhyaya
Author: Christian Ritz
Author: 
Author: Andrew A. Olkowski