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Author : Julie Marie Lich
Publisher :
ISBN 13 :
Total Pages : 214 pages
Book Rating : 4.3/5 (129 download)
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:
Author : Robert Joseph Starke
Publisher :
ISBN 13 :
Total Pages : 366 pages
Book Rating : 4.:/5 (48 download)
Download or read book Interaction of Glyphosate and Glufosinate with Postemergence Soybean Herbicides written by Robert Joseph Starke and published by . This book was released on 1998 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David K. Powell
Publisher :
ISBN 13 :
Total Pages : 368 pages
Book Rating : 4.:/5 (753 download)
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.
Author : Lawrence Anthony VanLieshout
Publisher :
ISBN 13 :
Total Pages : 174 pages
Book Rating : 4.:/5 (39 download)
Download or read book Interactions of Glyphosate with Preemergence Soybean Herbicides written by Lawrence Anthony VanLieshout and published by . This book was released on 1997 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Adam Louis Constine
Publisher :
ISBN 13 :
Total Pages : 154 pages
Book Rating : 4.7/5 (386 download)
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. .
Author : Karen Ann Corrigan
Publisher :
ISBN 13 :
Total Pages : 188 pages
Book Rating : 4.:/5 (89 download)
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:
Author : Jesaelen Gizotti de Moraes
Publisher :
ISBN 13 :
Total Pages : 93 pages
Book Rating : 4.:/5 (16 download)
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.
Author : Leslie Gaye Doss
Publisher :
ISBN 13 :
Total Pages : 350 pages
Book Rating : 4.:/5 (342 download)
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:
Author : Erin S. Chadbourne
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.:/5 (428 download)
Download or read book Effect of Selected Postemergence Herbicides on Glyphosate-resistant Soybean Growth, Development, and Yield Under Weed-free Conditions written by Erin S. Chadbourne and published by . This book was released on 1999 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Chad Joseph Lammers
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (139 download)
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.
Author : Kelly Allan Nelson
Publisher :
ISBN 13 :
Total Pages : 340 pages
Book Rating : 4.3/5 (129 download)
Download or read book Postemergence Weed Control in Soybean (Glycine Max (L.) Merr) with Imazamox, Imazethapyr, Oxasulfuron, and Cloransulam-methyl written by Kelly Allan Nelson and published by . This book was released on 1997 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Montien Somabhi
Publisher :
ISBN 13 :
Total Pages : 254 pages
Book Rating : 4.:/5 (98 download)
Download or read book Interaction Between Glyphosate and Certain S-triazine Herbicides written by Montien Somabhi and published by . This book was released on 1974 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigations were made in the field, greenhouse, growth chamber, and laboratory to: (a) observe the general activity of N- (phosphonomethyl)glycine (glyphosate); (b) determine the extent of its interaction with certain s-triazine herbicides; and (c) find an explanation for such an interaction. Greenhouse and growth chamber studies substantiated other observations that glyphosate is very active as a foliarly-applied herbicide. It had very little crop selectivity in these studies. Glyphosate stimulated the transpiration rate of wheat plants shortly after treatment. The stimulation disappeared as visible plant injury appeared. Glyphosate did not affect root-shoot ratios in wheat, measured on a dry weight basis over time. It did not seem to cause direct damage to cell membranes, since no significant early leakage of electrolytes from leaf sections floating in glyphosate solutions was observed. No significant differences were found in injury ratings or growth of wheat plants treated with different available formulations of glyphosate in the greenhouse. When glyphosate was applied to quackgrass in the field in combination with 2-chloro-4, 6-bis(ethylamino)-s-triazine (simazine), no clear interaction was observed, but simazine reduced glyphosate activity on quackgrass in the greenhouse. Antagonistic interactions were observed between glyphosate and simazine on quackgrass, corn, and beans, and between glyphosate and 2-chloro-4-(ethylamino)-6- (isopropylamino)-s-triazine (atrazine) on corn in greenhouse studies. Antagonism also was observed when glyphosate was applied to corn in combination with 2-chloro-2', 6'-diethyl-N-(methoxymethyl)-acetanilide (alachlor) and (2, 4-dichlorophenoxy)acetic acid (2, 4-D) which were not formulated with clay materials. The interaction of glyphosate with alachlor was similar to that provided by simazine or atrazine, while the interaction with 2, 4-D was temporary, disappearing after 1 week. In all cases, the interaction was overcome by an increase in application rate of glyphosate. When glyphosate and simazine were applied to corn and beans, reduction in glyphosate activity was observed only when the two herbicides were applied together as a mixture. Simultaneous application of simazine on different leaves of the same plants or to the soil while glyphosate was applied on the foliage did not produce any visible interaction. In subsequent experiments, an equal rate of the inert ingredients used in a commercial formulation of simazine also reduced the activity of glyphosate to a similar extent as when mixed with the commercial product containing the active ingredient. This finding tends to exclude the possibility of major physiological involvement in the interaction, and suggests a physical and/or chemical interaction between glyphosate molecules and those of simazine and the inert ingredients as a primary cause. In further laboratory studies, about 10% of the glyphosate was removed from solution by mixing with the simazine formulation or inert ingredients and centrifuging. Significantly more glyphosate was adsorbed by the suspended materials when the spray mixtures became more concentrated. Less glyphosate was recovered by washing dried pellets derived from the centrifugation of the spray mixtures in comparison with the amounts of glyphosate recovered by washing wet pellets. Supernatants of the spray mixtures applied to beans caused less plant injury than glyphosate alone. Addition of extra surfactant to these supernatants did not improve their activity on bean plants. Results of these studies are consistent with the hypothesis that physical and/or chemical interaction between glyphosate and other herbicide products in the spray tank and on the leaf surface is the primary cause of the observed reduction of glyphosate activity on test plants. Other possible explanations were not disproved and should be investigated further.
Author : Kent Wade Rorem
Publisher :
ISBN 13 :
Total Pages : 128 pages
Book Rating : 4.:/5 (458 download)
Download or read book Agronomic and Physiological Evaluation of Postemergence Herbicide Applications on Glyphosate-tolerant Soybean written by Kent Wade Rorem and published by . This book was released on 2000 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. Michael Roe
Publisher : IOS Press
ISBN 13 : 9789051993110
Total Pages : 224 pages
Book Rating : 4.9/5 (931 download)
Download or read book Herbicide Activity written by R. Michael Roe and published by IOS Press. This book was released on 1997 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developments in the understanding of herbicide activity and toxicology have expanded tremendously in the past fifteen years. Research on the mechanism of action of most major classes of herbicide chemistry has provided scientists with excellent insight into enzyme targets. More recently, developments in molecular biology have provided information about herbicide action at the genetic level. Less well understood are the toxicological aspects of herbicide activity that culminate in plant injury or death. Toxicology, Biochemistry and Molecular Biology of Herbicide Activity is a review of the recent literature on most of the major classes of herbicide chemistry in commercial use. The chapters include information about different aspects of herbicide activity related to photosynthesis, inhibition of amino acid biosynthesis, disruption of cell division and microtubule assembly, activity of phytohormone (auxin) mimics, inhibition of fatty acid biosynthesis and some developments in the understanding of herbicide resistance.
Author : Kristin K. Rosenbaum
Publisher :
ISBN 13 :
Total Pages : 107 pages
Book Rating : 4.:/5 (871 download)
Download or read book Interactions Between Glyphosate, Fusarium Infection of Waterhemp, and Soil Microorganisms written by Kristin K. Rosenbaum and published by . This book was released on 2013 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, an increasing number of weed populations have been characterized with resistance to the herbicide glyphosate. In particular, waterhemp has evolved glyphosate resistance (GR) across numerous soybean fields in Missouri. Therefore research is needed to determine best management practices for GR weed biotypes. The objectives of these experiments were to determine the frequency and distribution of GR waterhemp in Missouri and identify any in-field parameters which could serve as indicators of GR in future crop production systems; determine the effects of various pre-emergence (PRE) and post-emergence (POST) herbicide programs on palmer amaranth and waterhemp control, soybean yield, and net income in conventional, glyphosate-resistant, and glufosinate-resistant soybean production systems; determine the effects of soil microbial and phytopathogen populations on GR and susceptible (GS) waterhemp survival and Fusarium infection; and determine the soil microbial abundance and diversity in soils collected from soybean fields with differences in waterhemp biotypes and herbicide and crop rotation histories. Results from these experiments indicate herbicide programs that contain PRE herbicide treatments provide the best opportunity for season-long control of waterhemp and palmer amaranth, highest grain yields, and highest net returns in the soybean systems evaluated. GR was confirmed in 69% of the total waterhemp populations sampled in Missouri. Additionally, the in-field parameters evaluated suggest that soybean fields containing GR waterhemp were more likely to be free of other weed species, occur where soybeans were continuously cropped, occur where glyphosate was the only herbicide applied for several seasons consecutively, and where waterhemp exhibited signs of surviving herbicide treatment compared to fields characterized with GS waterhemp. Results of the soil study indicate plants are more sensitive to glyphosate in soils with microbial populations compared to those without and that glyphosate may predispose plants to soilborne phytopathogens. The results also suggest continuous use of glyphosate does not significantly affect soil microbial abundance or diversity.
Author : Jonathan Andrew Huff
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (693 download)
Download or read book Interactions of Glyphosate and Dicamba in Controlling Key Weed Species written by Jonathan Andrew Huff and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Interest and research on herbicide-resistant cropping systems has increased dramatically since the introduction of glyphosate-resistant crops in 1996. New advances in herbicide-resistant cropping systems, such as dicambaresistant soybean and cotton, provide opportunities to help alleviate selection pressure currently applied by glyphosate-only systems. While there is no doubt dicamba-resistant genetics will have a huge impact on production practice, there are questions that must be answered about possible interactions with dicamba and glyphosate tank mixtures. The primary objectives of this research were to evaluate the effect of glyphosate/dicamba combinations on common Mississippi weed species, as well as determine effects of these combinations on absorption and translocation of dicamba. Four monocots: johnsongrass, barnyardgrass, large crabgrass, and broadleaf signalgrass; and four dicots: sicklepod, hemp sesbania, prickly sida, and pitted morningglory, were chosen to represent troublesome weed species. Plants were sprayed at the 4(minus or plus)1 leaf stage with glyphosate, dicamba, and combinations of the two herbicides. Rates were chosen with the goal of achieving 40 to 70% control in order to determine synergistic/antagonistic responses. Antagonism was observed in each species tested. Increasing rates of both herbicides alleviated the antagonism in most weeds. A synergistic response was observed in all graminaceous species and pitted morningglory when herbicide rates increased. Barnyardgrass and sicklepod were selected to quantify absorption and translocation of 14C-dicamba in order to account for interactions observed from tank-mix combinations. Rates for dicamba and glyphosate were selected based on results from the interaction study. Dicamba, glyphosate, and tank-mix combinations were applied to sicklepod and barnyardgrass before treatment with 14C-dicamba. Plants were harvested 4, 12, 24, and 72 h after treatment. The addition of glyphosate to dicamba resulted in reduced translocation of 14Cdicamba in both species. While the data did indicate a translocation interaction, glyphosate and dicamba combinations effectively overcame antagonism effects when higher rates were applied on sicklepod and barnyardgrass.
Download or read book Interactions of Post Emergence Herbicides, Strobilurin Fungicides and Rhizoctonia Root Rot of Soybean written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
