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Interaction Of Glyphosate And Acetolactate Synthase Inhibitor Herbicides And Evaluation Of Weed Management Systems In Glyphosate Tolerant Soybean Glycine Max
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Book Synopsis Interaction of Glyphosate and Acetolactate Synthase-inhibitor Herbicides and Evaluation of Weed Management Systems in Glyphosate-tolerant Soybean (Glycine Max) by : Leslie Gaye Doss
Download or read book Interaction of Glyphosate and Acetolactate Synthase-inhibitor Herbicides and Evaluation of Weed Management Systems in Glyphosate-tolerant Soybean (Glycine Max) written by Leslie Gaye Doss and published by . This book was released on 1995 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interaction of Glyphosate with Postemergence Soybean Herbicides by : Julie Marie Lich
Download or read book Interaction of Glyphosate with Postemergence Soybean Herbicides written by Julie Marie Lich and published by . This book was released on 1995 with total page 214 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 Evaluation of Glyphosate and PPO-inhibiting Herbicide Tank-mixtures to Manage Glyphosate Resistance in Soybean by : Jesaelen Gizotti de Moraes
Download or read book Evaluation of Glyphosate and PPO-inhibiting Herbicide Tank-mixtures to Manage Glyphosate Resistance in Soybean written by Jesaelen Gizotti de Moraes and published by . This book was released on 2018 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Protoporphyrinogen oxidase (PPO)-inhibiting herbicides in combination with glyphosate for postemergence (POST) applications is one of the primary alternatives to manage glyphosate-resistant weeds and the only effective POST chemical option in conventional and glyphosate-tolerant soybean to control glyphosate and ALS-inhibiting resistant weeds. Antagonistic interactions have been reported between many different herbicide modes of action and optimal droplet size may be affected by tank-mixtures of different herbicides. Additionally, the impact of adjuvants on the factors aforementioned as well as on physical properties needs to be thoroughly investigate to maximize herbicide efficacy. Therefore, the objectives of this research were to: 1) conduct greenhouse and field studies to evaluate the impact of glyphosate and PPO-inhibiting herbicides (fomesafen or lactofen) applied alone and in tank mixtures on weed control, optimal droplet size, drift potential, and tank mixture interactions, 2) determine the influence of adjuvants on tank mixtures interactions, spray droplet-spectra, drift potential, and physical properties, (3) determine if herbicide efficacy (and thereby, weed control) is correlated to reduced surface tension and contact angle. Overall, applications from the tank mixtures resulted in antagonistic interactions and some of them were overcame by the addition of adjuvants. Droplet size and percent volume of droplets ≤ 150 μm were highly affected by nozzle type and spray solution. The oil based formulation of lactofen and crop oil concentrates were shattered by TTI nozzles due to its internal turbulence chamber creating smaller droplets and increasing driftable fines. The impact of nozzle selection on weed control was minimal and larger droplets at the rates and carrier volume used in this study could be used without compromising herbicide efficacy reducing drift potential. Adjuvants reduced the surface tension and contact angle of spray solutions; however, herbicide efficacy was only partially explained by the changes in these physical properties. Results emphasized the importance of better understanding the relationship among application variables and weed species. In addition, recommendations should be herbicide- and weed-specific in order to optimize herbicide applications and to maintain herbicide effectiveness.
Book Synopsis Interaction of Postemergence Herbicides with Glyphosate in Soybeans by : David K. Powell
Download or read book Interaction of Postemergence Herbicides with Glyphosate in Soybeans written by David K. Powell and published by . This book was released on 2011 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Field and greenhouse experiments were conducted in 2008, 2009, and 2010 to evaluate the efficacy of glyphosate combined with other broadleaf herbicides on herbicide-resistant and -susceptible weeds in Illinois. Although this research supports an improvement in control of glyphosate-resistant common waterhemp with the addition of PPO-inhibiting herbicides to glyphosate, the overall herbicide efficacy was still somewhat variable with evidence for environmental conditions that may alter efficacy of the tank mixtures. Thus, the use of preemergence, soil residual herbicides are still justified to reduce reliance on these postemergence herbicide mixtures for weed control in soybean and ultimately deter further selection of common waterhemp populations resistant to glyphosate and PPO-inhibiting herbicides.
Book Synopsis Glyphosate with and Without Residual Herbicides in No-till Glyphosate Resistant Soybeans by : Karen Ann Corrigan
Download or read book Glyphosate with and Without Residual Herbicides in No-till Glyphosate Resistant Soybeans written by Karen Ann Corrigan and published by . This book was released on 1999 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Weed Management in Glyphosate-tolerant Soybean (Glycine Max) by : Agustin Eduardo Gimenez
Download or read book Weed Management in Glyphosate-tolerant Soybean (Glycine Max) written by Agustin Eduardo Gimenez and published by . This book was released on 1997 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Thiencarbazone-Methyl by : Canada. Pest Management Regulatory Agency
Download or read book Thiencarbazone-Methyl written by Canada. Pest Management Regulatory Agency and published by . This book was released on 2010 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Health Canada's Pest Management Regulatory Agency (PMRA), under the authority of the Pest Control Products Act and Regulations, has granted conditional registration for the sale and use of Thiencarbazone-methyl Technical Herbicide, Velocity Herbicide and AE1162464 WG63 Herbicide, containing the technical grade active ingredient thiencarbazone, to control specific weeds in corn and wheat (spring and durum). This overview describes the key points of the evaluation, while the Science Evaluation provides detailed technical information on the human health, environmental and value assessments of Thiencarbazone-methyl Technical Herbicide, Velocity Herbicide and AE1162464 WG63 Herbicide.--Document.
Book Synopsis Weed Control, Soybean Injury, and Soybean Yield Effects of Common Postemergence Herbicides by : Comfort M. Ateh
Download or read book Weed Control, Soybean Injury, and Soybean Yield Effects of Common Postemergence Herbicides written by Comfort M. Ateh and published by . This book was released on 1997 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Advances in Weed Management by : Bhagirath S. Chauhan
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.
Book Synopsis The Economics of Glyphosate Resistance Management in Corn and Soybean Production by : Michael Livingston
Download or read book The Economics of Glyphosate Resistance Management in Corn and Soybean Production written by Michael Livingston and published by CreateSpace. This book was released on 2015-05-21 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glyphosate, known by many trade names, including Roundup, is a highly effective herbicide. Widespread glyphosate use for corn and soybean has led to glyphosate resistance, which is now documented in 14 weed species affecting U.S. cropland, and recent surveys suggest that acreage with glyphosate-resistant (GR) weeds is expanding. Data from USDA's Agricultural Resource Management Survey (ARMS), along with the Benchmark Study (conducted independently by plant scientists), are used to address several issues raised by the spread of GR weeds. Choices made by growers that could help manage glyphosate resistance include using glyphosate during fewer years, combining it with one or more alternative herbicides, and, most importantly, not applying glyphosate during consecutive growing seasons. As a result, managing glyphosate resistance is more cost effective than ignoring it, and after about 2 years, the cumulative impact of the returns received is higher when managing instead of ignoring resistance.
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 Mitigating Herbicide Impacts to Soybean by : Grant Lawson Priess
Download or read book Mitigating Herbicide Impacts to Soybean written by Grant Lawson Priess and published by . This book was released on 2019 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapidity in evolution of herbicide-resistant weeds and the resulting cost to U.S. farmers demonstrate the need to responsibly steward the limited number of herbicides available in agricultural systems. To reduce weed emergence and likewise added selection pressures placed on herbicides, early-season crop canopy formation has been promoted. However, impacts to soybean following a potentially injurious herbicide application have not been thoroughly evaluated. Therefore, field experiments were conducted to determine whether: 1) soybean injury from metribuzin or flumioxazin delayed canopy formation or changed the incidence of pathogen colonization; 2) residual herbicides applied preplant reduced the potential for soybean injury and achieved the same longevity of weed control as herbicides applied at planting; 3) POST-applied acetolactate synthase (ALS)- and protoporphyrinogen oxidase (PPO)-inhibiting herbicides alone and in combination with glufosinate delayed canopy formation or impacted grain yield. Few interactions between herbicides and soil-borne pathogens were observed. Results from various experiments showed that soybean canopy formation was delayed after an application of preemergence (PRE)-residual herbicides and postemergence (POST)-foliar-active herbicides. However, delays in crop canopy formation caused by a PRE application of metribuzin and flumioxazin were only observed in varieties with sensitivity to the herbicide. Soybean injury caused by PRE applications were mitigated by applying herbicides 14 days prior to planting. Treatments that were applied 14 days prior to planting and contained an effective herbicide with a half-life greater than 70 days suffered no reduction in longevity of Palmer amaranth control when compared to the same herbicide applied at planting. POST-applied herbicides delayed soybean canopy formation relative to the amount of injury present following application. Delays in canopy formation can result in a lengthened period of weed emergence, subsequently increasing the need for additional weed control and increasing selection pressure on sequentially applied herbicides. Nomenclature: Flumioxazin, glufosinate, metribuzin, Palmer amaranth, Amaranthus palmeri (S.) Wats., soybean Glycine max (L.) Merr. Key words: Acetolactate synthase (ALS)-inhibiting herbicides, canopy formation, half-life, herbicide-resistance weeds, POST foliar-active herbicide, preplant, protoporphyrinogen oxidase (PPO)-inhibiting herbicides, PRE-residual herbicide, soil-borne pathogen, soybean injury.
Book Synopsis Response and Physiology of Grafted Glyphosate-resistant and Conventional Soybean (glycine Max) to Glyphosate, and Efficacy of Bicyclopyrone in Vegetables by : Yin Chen
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.
Book Synopsis Physiological Ecology of North American Plant Communities by : Brain F. Chabot
Download or read book Physiological Ecology of North American Plant Communities written by Brain F. Chabot and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although, as W.D. Billings notes in his chapter in this book. the development of physiological ecology can be traced back to the very beginnings of the study of ecology it is clear that the modern development of this field in North America is due in the large part to the efforts of Billings alone. The foundation that Billings laid in the late 1950s came from his own studies on deserts and subsequently arctic and alpine plants, and also from his enormous success in instilling enthusiasm for the field in the numerous students attracted to the plant ecology program at Duke University. Billings' own studies provided the model for subsequent work in this field. Physiological techniques. normally confined to the laboratory. were brought into the field to examine processes under natural environmental conditions. These field studies were accompanied by experiments under controlled conditions where the relative impact of various factors could be assessed and further where genetic as opposed to environmental influences could be separated. This blending of field and laboratory approaches promoted the design of experiments which were of direct relevance to understanding the distribution and abundance of plants in nature. Physiological mechanisms were studied and assessed in the context of the functioning of plants under natural conditions rather than as an end in itself.
Book Synopsis Interaction Evaluation of Glyphosate, Glufosinate, Chlorimuron and Thifensulfuron Combinations by : Rachel Kaye Bethke
Download or read book Interaction Evaluation of Glyphosate, Glufosinate, Chlorimuron and Thifensulfuron Combinations written by Rachel Kaye Bethke and published by . This book was released on 2010 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
