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Partial Returns Of Weed Management Systems In Herbicide Resistant And Conventional Soybean
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Book Synopsis Partial Returns of Weed Management Systems in Herbicide-resistant and Conventional Soybean by : Angela Ann Midthurn-Hensen
Download or read book Partial Returns of Weed Management Systems in Herbicide-resistant and Conventional Soybean written by Angela Ann Midthurn-Hensen and published by . This book was released on 2001 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Weed Management, Yield, and Economic Return on Investment of Six Soybean Systems in Conventional- and No-till by : Matthew C. Geiger
Download or read book Weed Management, Yield, and Economic Return on Investment of Six Soybean Systems in Conventional- and No-till written by Matthew C. Geiger and published by . This book was released on 2018 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shifts toward herbicide resistant weed populations in row crop agriculture is a widespread epidemic. Sequential applications of EPSPS synthase-inhibitors, acetolactate synthase-inhibitors, and other herbicide site-of-action groups, have led to the selection and spread of herbicide-resistant weed biotypes (Powles, 2008; Tranel and Wright, 2002). New soybean systems with resistance to auxin herbicides, along with proprietary herbicide formulations, have been developed to control these herbicide-resistant weeds in soybean production. These new technologies will be compared in both conventional- and no-till with technologies which have been available for several years, in the aspects of weed control, yield, and economic return on investment (EROI). In both 2016 and 2017, when using preemergence (PRE) followed by postemergence (POST) herbicide programs, there were few differences in weed control between the six soybean systems. Adequate grain yield was provided by all soybean systems when proper herbicide programs were used. EROI was the highest when optimum yields were achieved, regardless of treatment cost.
Book Synopsis Weed Management Systems for Conventional and Glyphosate-resistant Soybean Following Rice by : Larry G. Heatherly
Download or read book Weed Management Systems for Conventional and Glyphosate-resistant Soybean Following Rice written by Larry G. Heatherly and published by . This book was released on 2003 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparison of Roundup Ready and Conventional Soybean (glycine Max L.) Weed Control Systems for Optimizing Yield and Economic Profitability by : Brittany Lee Gaban
Download or read book Comparison of Roundup Ready and Conventional Soybean (glycine Max L.) Weed Control Systems for Optimizing Yield and Economic Profitability written by Brittany Lee Gaban and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research was conducted in 2010, 2011 and 2012 at the East Tennessee Research and Education Center in Knoxville, TN, in order to compare differences in soybean yield among differing levels of weed control within Roundup Ready® [Glyphosate-resistant] (RR)and conventional soybean cultivars to gain a better understanding of the impact different intensities of weed control have on RR and conventional cropping systems. Results determined that after applying the weed control regimens, there was no significant difference (p Glyphosate resistant weeds introduce new challenges and create a more costly weed control regimen, especially when using a RR based soybean cultivation operation. Therefore, calculated economic returns of RR and conventional weed management technologies used in this study were contrasted to determine profitability of each system. In a glyphosate resistant-free environment, the conventional soybean cultivar had a net return of only 0.4% greater than that of the RR cultivar. The comparison of cultivar net return and yield indicates conventional soybean production is competitive to RR productions, however the tremendous use of RR technologies leaves conventional crops vulnerable to potential damage or death due to drift. If glyphosate resistant weeds are present in an environment, RR production and hand hoeing may be the best choice for weed control.
Book Synopsis Weed Management Systems for Conventional and Glyphosate-resistant Soybean Following Rice by : L. G. Heatherly
Download or read book Weed Management Systems for Conventional and Glyphosate-resistant Soybean Following Rice written by L. G. Heatherly and published by . This book was released on 2005 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Automation: The Future of Weed Control in Cropping Systems by : Stephen L. Young
Download or read book Automation: The Future of Weed Control in Cropping Systems written by Stephen L. Young and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technology is rapidly advancing in all areas of society, including agriculture. In both conventional and organic systems, there is a need to apply technology beyond our current approach to improve the efficiency and economics of management. Weeds, in particular, have been part of cropping systems for centuries often being ranked as the number one production cost. Now, public demand for a sustainably grown product has created economic incentives for producers to improve their practices, yet the development of advanced weed control tools beyond biotech has lagged behind. An opportunity has been created for engineers and weed scientists to pool their knowledge and work together to ‘fill the gap’ in managing weeds in crops. Never before has there been such pressure to produce more with less in order to sustain our economies and environments. This book is the first to provide a radically new approach to weed management that could change cropping systems both now and in the future.
Book Synopsis Are Superweeds An Outgrowth of USDA Biotech Policy? (Part I), Serial No. 111-158, July 28, 2010, 111-2 Hearing, * by :
Download or read book Are Superweeds An Outgrowth of USDA Biotech Policy? (Part I), Serial No. 111-158, July 28, 2010, 111-2 Hearing, * written by and published by . This book was released on 2011 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Integrated Weed Management for Sustainable Agriculture by : Robert Zimdahl
Download or read book Integrated Weed Management for Sustainable Agriculture written by Robert Zimdahl and published by Burleigh Dodds Series in Agric. This book was released on 2017-12-14 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Weeds remain a major obstacle to improved yields in agriculture. At the same time, established methods of control are being undermined by problems such as herbicide resistance. This major collection reviews key developments in integrated weed management (IWM) to manage weeds more sustainably.
Book Synopsis Optimization of Weed Control Systems in Herbicide Resistant Soybean by : Justin Lee Norris
Download or read book Optimization of Weed Control Systems in Herbicide Resistant Soybean written by Justin Lee Norris and published by . This book was released on 2000 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Integrated Weed Management and Herbicide Application Parameters for Herbicide-resistant Soybean in Kansas by : Chad Joseph Lammers
Download or read book Integrated Weed Management and Herbicide Application Parameters for Herbicide-resistant Soybean in Kansas written by Chad Joseph Lammers and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrated weed management and herbicide application practices were assessed in field and greenhouse studies to improve weed control in herbicide-resistant soybeans (Glycine max (L.) Merr.) grown in Kansas. The field study was conducted to evaluate weed control, soybean yield, and profitability in two herbicide-resistant soybean systems and two row spacings. 2,4-D-, glyphosate-, and glufosinate- resistant (Enlist E3) and isoxaflutole-, glyphosate-, and glufosinate- resistant (LLGT27) soybeans were planted in 38- and 76-cm row spacing for four site-years. Three herbicide treatments were evaluated in each system: pre-emergence herbicide only (PRE), PRE followed by early post-emergence (POST), and POST plus overlapping residual (POR). Weed control was evaluated every 2 weeks after PRE application through R7 soybean. Weed biomass was collected before POST applications and at R7 soybean. Soybean yield was recorded at harvest. Data were subjected to analysis of variance and means separation. In Ottawa during 2020, POST and POR treatments resulted in ≥ 99% control for all species four WAT, while PRE resulted in ≥ 84% control. Similarly, control at Ashland Bottoms was ≥ 90% for POST and POR treatments, while PRE resulted in 7% for isoxaflutole- 62% for 2,4-D-resistant soybeans. All treatments resulted in ≥ 95% control at Scandia in 2021. Row spacing had a minimal effect on weed control and mixed results for yield. In the greenhouse study, the objective was to determine the effect of herbicide combination, optimize carrier volume, and evaluate weed height on weed control. Co-applications of combinations of 2,4-D choline, glyphosate, and glufosinate were applied in carrier volumes of 93-, 140-, and 187- L ha−1to 5-, 10-, and 20-cm Palmer amaranth (Amaranthus palmeri S. Watson) and large crabgrass (Digitaria sanguinalis L.). Visual ratings and above ground biomass were collected four weeks after treatment. Water-sensitive paper was also sprayed with the same herbicide combinations and carrier volumes to evaluate differences in spray coverage. Data were subjected to analysis of variance and means separation. Carrier volume did not affect Palmer amaranth or large crabgrass control. Control of 5-, 10-, and 20-cm Palmer amaranth was 100%, ≥ 91%, and 6.7 to 79%, respectively, and variation was caused by the herbicide combinations. 2,4-D plus glyphosate provided the greatest Palmer amaranth control. Large crabgrass control pooled for both experiments was ≥ 82% when treatments were applied at 5 cm, but control of 10- or 20-cm large crabgrass was reduced to 51 to 56%. There was a carrier volume by herbicide co-application interaction for the number of droplets deposited and percent area covered on water-sensitive paper. Co-applications containing glufosinate had more droplets than those not containing glufosinate. 2,4-D plus glyphosate had the smallest percent area covered, compared to the other herbicide co-applications. Data from the field study confirms that two-pass herbicide programs are superior to PRE- only programs, regardless of the inclusion of a layered residual herbicide. However, this research did not evaluate the impact of layered residual herbicides on weed seed production, which is crucial for long-term weed management. Results from the greenhouse study suggest that under ideal conditions, carrier volume is less important than herbicide combination and weed size for control of Palmer amaranth and large crabgrass.
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 436 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 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 Evaluation of Herbicide-resistant Soybean Response to Heat Stress and Weed Management Systems by : John Milton Gertz
Download or read book Evaluation of Herbicide-resistant Soybean Response to Heat Stress and Weed Management Systems written by John Milton Gertz and published by . This book was released on 1999 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Weed Control, Population Density Change and Herbicide Persistence in Soils in No-tillage and Conventional Tillage Soybean-wheat Double Cropping Systems by : Fitzroy Dennis Bullock
Download or read book Weed Control, Population Density Change and Herbicide Persistence in Soils in No-tillage and Conventional Tillage Soybean-wheat Double Cropping Systems written by Fitzroy Dennis Bullock and published by . This book was released on 1980 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Applying Crop and Weed Competitive Dynamics For Weed Management in Soybean and Peanut by :
Download or read book Applying Crop and Weed Competitive Dynamics For Weed Management in Soybean and Peanut written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Demand for organic food products has consistently increased for more than 20 years. Demand for organic grain has been particularly high, leading to price premiums of over double the conventional price. The largest obstacle to organic soybean production is weed management. The first investigation aimed at improving weed management in organic soybean tested the effectiveness of pre-plant rotary hoeing to reduce the need for multiple post-plant rotary hoeing. Pre-plant rotary hoe treatments included a weekly rotary hoeing four weeks before planting, two weeks before planting and none. Post-plant rotary hoe treatments consisted of zero, one, two, three, and four post-plant rotary hoe uses. Weed control was increased with pre-plant rotary hoeing at Plymouth in 2006 and 2007 but this effect disappeared with the first post-plant rotary hoeing. Multiple post-plant rotary hoe uses decreased soybean plant populations, decreased soybean canopy height, lowered soybean pod position and decreased soybean yield. In another experiment, the effect of soybean population on weed control was investigated. This research was conducted in 2006 and 2007 to investigate seeding rates of 185,000; 309,000; 432,000; and 556,000 live seeds/ha. All rates were planted on 76 cm row spacing in organic and conventional weed management systems. Increased soybean seeding rates reduced weed ratings at 3 of the 5 sites. Increased soybean seeding rates also resulted in higher yield at 3 of the 4 sites. Maximum economic returns for organic treatments were achieved with the highest seeding rate in all sites. In a separate experiment, the effect of soybean genotype on weed suppression was investigated. Twenty seven genotypes were chosen based on varying seed sizes, leaf shape, and height. Genotypes were compared in weedy and weed free conditions. Canopy traits and percent ground cover estimates were measured in weed free plots. Soybean and weed biomass has harvested at 7 weeks after emergence. Differences in.
Book Synopsis Weed Control and Tank-mix Interactions in Soybean Resistant to Dicamba, Glyphosate, and Glufosinate by : Adam Louis Constine
Download or read book Weed Control and Tank-mix Interactions in Soybean Resistant to Dicamba, Glyphosate, and Glufosinate written by Adam Louis Constine and published by . This book was released on 2021 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: XtendFlex® soybean is a new trait platform which confers resistance to three herbicide sites of action that include the active ingredients dicamba, glyphosate, and glufosinate. The ability to use these three herbicides in one system has generated new management questions. Field and greenhouse experiments were conducted in 2019 and 2020 to: 1) investigate weed control systems in conventional and no-tillage XtendFlex® soybean, and 2) identify any antagonistic or synergistic responses from herbicide-tank mixtures used in this system. Control of glyphosate-resistant (GR) waterhemp was optimized with PRE flumioxazin followed by (fb) POST glufosinate or dicamba alone or in combination with each other or glyphosate. Two-pass POST systems also controlled GR waterhemp as long as dicamba and/or glufosinate was used in each application. GR horseweed control was exceptional with all herbicide programs evaluated, except glyphosate alone EPOS or POST. Annual grass control was reduced with EPOS and POST glufosinate + dicamba tank-mixtures. In contrast, this combination was often additive or synergistic for both broadleaf and grass weed control in the greenhouse. Several glyphosate + glufosinate combinations were antagonistic, especially with broadleaf weeds. Dicamba + glyphosate was often antagonistic in the greenhouse but was additive or synergistic for GR waterhemp and GR horseweed control in the field. Antagonisms were often observed when all three herbicides were applied together; however, not all antagonisms resulted in poor control. This research provides growers insight into management strategies for various agronomically important weeds in XtendFlex® soybean. .
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
