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Showing 1 to 20 of 32 for “"Glyphosate resistant"”.
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Weed resistance risk management in glyphosate-resistant cotton
The introduction of glyphosate resistance into Australian cotton systems will have an effect on conventional weed management practices, the weed species present and the risk of glyphosate resistance evolving in weed species. Therefore, it is important that the effects of these management practices, …
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Alternative Herbicide Control Options for Glyphosate-Resistant Palmer Amaranth (Amaranthus Palmeri)
<p>The occurrence of glyphosate-resistant (GR) Palmer amaranth has prompted a shift in weed management strategies worldwide. Studies were conducted with the aim to (1) establish and compare the degree of tolerance of GR Palmer amaranth populations; (2) assess the efficacy of glufosinate, …
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Investigating the heritability of resistance fueling copy number variation in glyphosate resistant Amaranthus palmeri
… palmeri, CNV of the EPSPS gene, the target of glyphosate herbicide, ranges from 1 to over 160 copies, and is the primary genetic determinant of glyphosate resistance. The amplified copies of EPSPS are found as extrachromosomal circular DNA, which raises questions about the heritability of …
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Evaluation of Glyphosate Resistant Giant Ragweed (Ambrosia trifida) in Ohio Soybean (Glycine max) Fields
… were conducted in 2011 and 2012 to evaluate glyphosate resistant giant ragweed in Ohio soybean (Glycine max) fields. Specific objectives were as follows: 1) Determine the spatial distribution and incidence of giant ragweed (Ambrosia trifida) infestations in Ohio soybean fields at the end of …
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Resistance Screening and Control Options for Glyphosate-Resistant Palmer Amaranth (Amaranthus palmeri) in Cotton (Gossypium hirsutum)
<p>In the mid-2000's, glyphosate-resistant Palmer amaranth biotypes began to emerge in many southern states. In 2006, glyphosate-resistant Palmer amaranth was identified in a field in Mississippi County, Arkansas. A greenhouse experiment was conducted in 2008 to screen Palmer amaranth accessions, …
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Integration of Herbicide Programs with Cultural and Mechanical Practices for Managing Glyphosate-Resistant Palmer amaranth (Amaranthus palmeri) in Soybean (Glycine max)
<p>Herbicide-resistant Palmer amaranth is the most troublesome weed in Arkansas row crops, causing producers to rely heavily on multiple mechanisms of action to reduce selection pressure for further evolution of herbicide resistance and to successfully produce a profitable crop. It is critical for …
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Structure of the amplified 5-enolpyruvylshikimate-3-phosphate synthase gene in glyphosate-resistant carrot cells and attempts to isolate the anthranilate synthase gene from plants
… suspension cultured cell lines selected for glyphosate resistance was carried out to determine the mechanism of gene amplification in this plant system. Cloning of the EPSPS gene and 5$\sp\prime$ flanking sequences was carried out and two different DNA structures were revealed. The 13 kbp …
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Regional whole plant and molecular response of Kochia scoparia to glyphosate
Globally, glyphosate (Roundup®) resistant weeds pose a serious challenge to modern agricultural practices that utilize glyphosate for weed control, including Roundup Ready® cropping regimes. Locally, glyphosate resistant Kochia scoparia have been identified throughout the central Great Plains, and …
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Distribution and Control of Herbicide-Resistant Italian Ryegrass (Lolium perenne L. ssp. multiflorum Lam. Husnot) in Arkansas
… ryegrass from across Arkansas for resistance to glyphosate, diclofop, pinoxaden, and pyroxsulam; determine if there were any differences in control of 12 glyphosate-resistant populations in relation to glyphosate rate or application timing; determine the level of glyphosate resistance in one …
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EFFECTS OF ANTHROPOGENIC SELECTION PRESSURE ON THE EVOLUTION OF A COMMON AGRICULTURAL WEED: DOES ADAPTATION COME WITH A DETECTABLE COST? A STUDY OF GLYPHOSATE-RESISTANT (GR) AND -SUSCEPTIBLE (GS) BIOTYPES OF Conyza canadensis
As the acreage of glyphosate-resistant (GR) cropping systems increases, so does the occurrence of herbicide-resistant weeds in the landscape. Biotypes of GR <italic>Conyza canadensis</italic> were first observed in Delaware, USA, in 2000. Since the first documentation of GR <italic>C. …
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Herbicide phytotoxicity response and eradication studies in Miscanthus x giganteus
… 2008 investigating the dose-response of Mxg to glyphosate showed that Mxg greenhouse-grown plantlets were controlled with as little as 360 g ae/ha glyphosate. Three field experiments were conducted in 2007 to 2009 to evaluate various methods of controlling a mature stand of Mxg. The first …
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Control, Assessment and Glyphosate Resistance of Palmer Amaranth (Amaranthus palmeri S. Wats) in Virginia
Glyphosate resistant crops were rapidly adopted by farmers since their introduction in 1996 and currently, greater than 90% of cotton and soybean crops are glyphosate resistant. Glyphosate has been an effective mean for controlling Palmer amaranth, however overreliance on glyphosate based systems …
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Double-Cropped Soybean Response to Various Wheat Stubble Managements
… and yield characteristics for double-cropped glyphosate-resistant soybean, soil moisture retention and soil surface shading, monitor weed response characteristics, and to perform a simple economic analysis comparing the four WSM treatments. Soybean plant height, lowest pod height, and soil …
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Understanding Plant Response to Stress Using Gene Model Quality Evaluation and Transcriptome Analysis
… Corn Belt in the United States. The use of glyphosate (commercial name: Roundup) and glyphosate-ready crop systems managed to keep giant ragweed populations under control. Glyphosate-ready crop systems consist of seeds that are resistant to glyphosate, which enables farmers to use glyphosate …
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The Role Of Soil Microorganisms In The Resistance Of Giant Ragweed, Horseweed, And Common Lambsquarters To Glyphosate
<p>Continuous glyphosate use has contributed to an increasing number of problematic glyphosate-resistant (GR) weeds. The mechanism of resistance in many GR weeds is poorly understood, in part, due to a poor understanding of how exactly glyphosate kills a plant. In previous research, the efficacy of …
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Welfare impacts of GMO adoption along the marketing chain
… establish if and how much they benefit society. Glyphosate resistant soybean can be seen as such a technological improvement that has generated numerous studies attempting to measure the welfare gains. There are obvious gains from adopting the technology from a production efficiency standpoint, …
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Biology and Control of Eastern Black Nightshade, Palmer Amaranth, and Common Pokeweed, in No-Till Systems on the Eastern Shore Regions of Virginia and Maryland
… the translocation and metabolism of 14C-glyphosate was studied in common pokeweed. This research identified a population of eastern black nightshade that was differentially sensitive to families of ALS-inhibiting herbicides, with tolerance to members of the sulfonylurea family, but …
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Interactions of post emergence herbicides, strobilurin fungicides and Rhizoctonia root rot of soybean
… north-central United States. The emergence of glyphosate resistant weeds and the payment premium for growing non-GMO soybeans has increased the use of non-glyphosate herbicides. However, some of these herbicides may increase the severity of root rot caused by Rhizoctonia solani Field and …
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Cotton Injury Due to Soil- or Foliar-Applied Herbicides: An Assessment Based on the Influences of Genetic, Agronomic, and Environmental Factors
<p>Increasing populations of glyphosate-resistant weeds, such as Palmer amaranth, have prompted growers to pursue alternative means of weed control in cotton. In many cropping systems, this means the utilization of older chemistries and residual herbicides. The goal of this research was to evaluate …
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Rapeseed (Brassica napus L.) Termination and Integration of Halauxifen into Virginia Cotton (Gossypium hirsutum L.) Production
… that successfully terminated rapeseed include glyphosate plus 2,4-D and paraquat plus 2,4-D. Halauxifen-methyl is a new Group 4 herbicide marketed for preplant burndown horseweed (Conyza canadensis L.) control. Previous research indicates that halauxifen effectively controls …
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