Download or read book Influence of Herbicides and Crop Weed Competition on Physiological Aspects in Soybean Glycine Max L written by BADIGER RAJASHWKAR G and published by . This book was released on 1995 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Morphological Molecular and Physiological Mechanisms of Early Season Weed Competition in Soybean Glycine Max L Merr written by Andrew McKenzie-Gopsill and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The presence of early emerging weeds alters light quality perceived by crop plants through reducing the red (670 nm) to far-red (730 nm) ratio of light (R/FR). This change in light quality has long-lasting effects on crop plants, which may lead to yield loss. The objective of this thesis was to investigate the morphological, molecular and physiological responses of soybean (Glycine max (L.) Merr.) to far-red-enriched (FR-E) light reflected from neighbouring weeds in a controlled environment, in order to gain insight into the mechanisms of yield loss. Based on the existing knowledge on the effect of FR-E light on photosystem stoichiometry, it was hypothesised that if soybean seedlings perceive FR-E light reflected from neighbouring weeds at early growth stages, then an initial oxidative stress response will trigger a cascade of down-stream morphological and physiological events that may potentially contribute to yield loss. Morphological analyses revealed rapid changes in the root/shoot ratio of soybean seedlings upon emergence in response to FR-E light. This was accompanied by rapid induction of reactive oxygen species (ROS) scavenging genes. Analyses of enzymatic and non-enzymatic scavengers of ROS demonstrated that a primary and fundamental impact of FR-E light on soybean unifoliate leaves was increased generation of singlet oxygen and its conversion to hydrogen peroxide via ascorbate. This led to reductions in activity of a thiol-modulated Calvin cycle enzyme and CO2 assimilation as well as altered carbon partitioning. Chemical inhibition of plastid terminal oxidase and mitochondrial alternative oxidase as well as measurements of malate/oxaloacetate shuttle enzyme activities demonstrated the involvement of alternative electron pathways in early responses of soybean seedlings to FR-E light. Furthermore, investigation of the impact of FR-E light on plastic responsiveness of soybean to subsequent drought stress under field conditions revealed that the frequency, type and severity of stress influenced the ability of a soybean to express plasticity. The findings of this research not only shed light on the mechanisms of resource independent crop-weed competition that may contribute to yield loss, but also provide an important foundation for studies aimed towards improving crop competitive ability and reducing the negative impact of weeds on yield.
Download or read book Effect of Soybean Glycine Max L Merr Row Width and Plant Population of Weed Competition and Soybean Yield and Influence of Stem boring Insects on Common Lambsquarters Chenopodium Album L Control with Glyphosate written by Dana Brian Harder and published by . This book was released on 2006 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Efficacy of Herbicides for Weed Management in Soybean Glycine Max L written by Sylvestre Habimana and published by LAP Lambert Academic Publishing. This book was released on 2014-02 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Food Security used to be the prime concern up to 1960s and now emphasis is on sustainable crop production. The agronomic constraints of growing and handling of soybean could be minimized by appropriate mechanical aids for sowing, intercultivation, weed control, harvesting and threshing. Among the constraints, weed infestation in soybean is one of the major hurdles which limit its productivity level. Depending on the type of weeds, their intensity and time of crop weed competition reduces the yields to the extent of 20 to 50 per cent when weeds are grown with crop for long season. The traditional methods of weed control by hand weeding or mechanical means are now becoming costly, tedious, labor intensive and time consuming. Unavailability of sufficient labor at critical stage of crop growth for hand weeding.Under these circumstances, it is inevitable to adopt alternate measures which help to control weeds early in the season and also at critical periods of crop weed competition.The only choice for controlling weeds would be through herbicides at appropriate level.The Author is optimistic that the present book will be well received across soybean growers and researchers in the world
Download or read book Crop Weed Competition in Soybean Glycine Max L Mirrill Crop in Relation to Chemical and Mechanical Methods of Weed Control written by Surjit Singh Dahiya and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Weed Crop Competition written by Robert L. Zimdahl and published by John Wiley & Sons. This book was released on 2007-11-19 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the past 20 years, the first edition of this text has been widely cited as authoritative academic reference. The latest edition continues the tradition set by the original book, and covers weed science research that has been published since 1980. This book aims to reduce the instance of research duplication—saving scientists and supporting institutions time and money. Not only does the second edition of Weed Crop Competition review, summarize, and combine current research; it critiques the research as well. This text has the potential to accelerate advancements in weed crop competition, which remains an important factor that affects crop yields. Scientists in foreign countries where access to literature is often limited or nonexistent, will find the information in this text invaluable. Weed scientists, crop scientists, plant ecologists, sustainable agriculturists, and organic agriculturists will be well-pleased with this long overdue and much needed new editionWeed Crop Competition provides a unique reference that reviews, summarises and synthesizes the literature published concerning research on this topic. The first edition has been one of the most frequently cited sources in weed science for the past 20 years. The second edition covers the significant body of literature that has been published since 1980. Originally intended to survey existing research, the intent of the book is to reduce the instance of research duplication, thus saving scientists and their institutions time and money, and expediting advancements in weed crop competition, an important factor affecting crop yields. Scientists in foreign countries where access to the literature is often limited or non-existent, find the information an invaluable resource. This long overdue and much needed new edition rejuvenates the tradition set by the original book.
Download or read book Influence of Growth Regulators on Physiological Aspects in Soybean Glycine Max L Merrill written by PANKAJ KUMAR and published by . This book was released on 1998 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Response and Physiology of Grafted Glyphosate resistant and Conventional Soybean glycine Max to Glyphosate and Efficacy of Bicyclopyrone in Vegetables written by Yin Chen and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Techniques to improve specialty crop herbicide tolerance, and identifying new methods of weed control are needed to help secure the future of vegetable production. My dissertation research addressed both concerns. First, I used soybean as model plant to investigate response and physiology of grafted glyphosate-resistant (RR) and conventional (CN) soybean plants to glyphosate. Glyphosate (0.28, 0.84 and 1.68 kg ae ha-1) was applied to CN/CN (scion/rootstock), CN/RR, RR/CN (only in growth stage experiment) and RR/RR grafted plants that had been generated using CN and RR genotypes. Variables tested included three growth stages (3, 6 and 10-leaf stages), nine CN/RR genotype combinations, and two growing environments (day/night thermoperiods of 28/22 C and 24/18 C). Small CN/RR plants (65%) and medium-sized plants (50%) were injured more than large plants (40%) 34 days with 0.84 kg ae ha-1 of glyphosate. Genotype of the scion had a greater effect on glyphosate tolerance compared to rootstock. Fewer leaves produced on CN/RR construct 5388/9392 under the warmer day/night temperatures following treatment with glyphosate. Seventy-two hours after treatment (HAT), 35% less shikimate was found in CN/RR compared to CN/CN plants. No cp4-epsps mRNA was detected in leaves of CN/RR plants, but a very small amount of CP4-EPSPS protein (=0.004% of that in RR leaf) was detected in the CN/RR leaves. More foliar-applied 14C-glyphosate and derivative was translocated to the root system of CN/RR compared to CN/CN. These data indicate that translocation of glyphosate from the CN scion to the RR rootstock is a major contributor to the partial tolerance to glyphosate observed in CN/RR transgrafted soybeans. Second, to aid in development of new weed control methods for vegetables, I assessed the response of several vegetable crops as well as three important weed species to the new herbicide bicyclopyrone. Onion, carrot, radish and dill were relatively tolerant of pre-emergence (PRE) and post-directed (POSTDIR) bicyclopyrone at 37.5 and 50 g ai ha-1. In contrast, bicyclopyrone post-emergence (POST) induced severe injury. Greenhouse experiments further examined the effect of soil type and variety on the response of onion, carrot and leek to 0, 12.5, 25, 50 and 100 g ha-1 of bicyclopyrone applied PRE. All test crops were uninjured by bicyclopyrone PRE when grown in muck soil, whereas all crops grown in sand + Pro-Mix BXTM blend were injured. Control of hairy galinsoga (Galinsoga quadriradiata Cav.), common purslane (Portulaca oleracea L.) and prostrate pigweed (Amaranthus blitoides S. Wats.) treated with bicyclopyrone POST or PRE was assessed in different soils and with each weed at three stages of growth. POST bicyclopyrone at 37.5 and 50 g ha-1 controlled hairy galinsoga and small common purslane plants (¿ 80% injury).. Hairy galinsoga was well controlled (80% injury) when growing in a Wooster silt loam and in a Pro-Mix BXTM 2:3 v/v blend. Common purslane was injured by PRE application to the muck soil and was well controlled in the Wooster silt loam and Pro-Mix BXTM blend. Bicyclopyrone POST and PRE did not control prostrate pigweed in either soil type or at any growth stage.
Download or read book Effects of Seed Treatments on the Physiological Changes in Soybean Glycine Max L Merr Induced by the Presence of Neighbouring Weeds written by Hae Won Kim and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Herbicide Glyphosate written by E. Grossbard and published by Butterworth-Heinemann. This book was released on 1985 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Literatuuronderzoek betreffende herbicide glyfosaat, met aandacht voor de chemie; werkingsmechanisme bij zowel onkruiden als gewassen; werkzaamheid in diverse gewassen; gevolgen voor het milieu (inclusief non-target organismen) en de toepassingsmethodiek
Download or read book Soybean Glycine Max Weed Control Systems and the Effects of Herbicides and Depth of Planting on Soybean Injury written by Robert Brent Westerman and published by . This book was released on 1988 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soybean written by Hany El-Shemy and published by BoD – Books on Demand. This book was released on 2011-11-02 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: Worldwide, soybean seed proteins represent a major source of amino acids for human and animal nutrition. Soybean seeds are an important and economical source of protein in the diet of many developed and developing countries. Soy is a complete protein and soyfoods are rich in vitamins and minerals.Soybean protein provides all the essential amino acids in the amounts needed for human health. Recent research suggests that soy may also lower risk of prostate, colon and breast cancers as well as osteoporosis and other bone health problems and alleviate hot flashes associated with menopause. This volume is expected to be useful for student, researchers and public who are interested in soybean.
Download or read book Non Chemical Weed Control written by Khawar Jabran and published by Academic Press. This book was released on 2018-01-03 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Non-Chemical Weed Control is the first book to present an overview of plant crop protection against non-food plants using non-chemical means. Plants growing wild—particularly unwanted plants found in cultivated ground to the exclusion of the desired crop—have been treated with herbicides and chemical treatments in the past. As concern over environmental, food and consumer safety increases, research has turned to alternatives, including the use of cover crops, thermal treatments and biotechnology to reduce and eliminate unwanted plants. This book provides insight into existing and emerging alternative crop protection methods and includes lessons learned from past methodologies. As crop production resources decline while consumer concerns over safety increase, the effective control of weeds is imperative to insure the maximum possible levels of soil, sunlight and nutrients reach the crop plants. Allows reader to identify the most appropriate solution based on their individual use or case Provides researchers, students and growers with current concepts regarding the use of modern, environment-friendly weed control techniques Presents methods of weed management—an important part of integrated weed management in the future Exploits the knowledge gained from past sustainable weed management efforts
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.
Download or read book The Soybean written by Guriqbal Singh and published by CABI. This book was released on 2010 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: The soybean is a crop of global importance and is one of most frequently cultivated crops worldwide. It is rich in oil and protein, used for human and animal consumption as well as for industrial purposes. Soybean plants also play an important role in crop diversification and benefit the growth of other crops, adding nitrogen to the soil during crop rotation. With contributions from eminent researchers from around the world, The Soybean provides a concise coverage of all aspects of this important crop, including genetics and physiology, varietal improvement, production and protection technology, utilization and nutritional value.
Download or read book Recent Advances in Weed Management written by Bhagirath S. Chauhan and published by Springer. This book was released on 2014-07-10 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume addresses recent developments in weed science. These developments include conservation agriculture and conservation tillage, climate change, environmental concerns about the runoff of agrochemicals, resistance of weeds and crops to herbicides, and the need for a vastly improved understanding of weed ecology and herbicide use. The book provides details on harnessing knowledge of weed ecology to improve weed management in different crops and presents information on opportunities in weed management in different crops. Current management practices are also covered, along with guidance for selecting herbicides and using them effectively. Written by experts in the field and supplemented with instructive illustrations and tables, Recent Advances in Weed Management is an essential reference for agricultural specialists and researchers, government agents, extension specialists, and professionals throughout the agrochemical industry, as well as a foundation for advanced students taking courses in weed science.
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.
