herbicide tolerance Articles
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Volunteer corn presents new challenges for insect resistance management
Genetically-modified (GM) corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] dominate the North American agricultural landscape and are becoming increasingly important as biofuels. However, as herbicide-tolerance and insecticidal traits are often simultaneously expressed by individual plants, glyphosate [N-(phosphonomethyl) glycine]-resistant (GR) volunteer corn is becoming a widespread ...
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A comparison of the herbicide tolerances of rare and common plants in an agricultural landscape
Declining plant biodiversity in agroecosystems has often been attributed to escalating use of chemical herbicides, but other changes in farming systems, including the clearing of seminatural habitat fragments, confound the influence of herbicides. The present study introduces a new approach to evaluate the impacts of herbicide pollution on plant communities at landscape or regional scales. If ...
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The lack of clear GMO regulation: its impact on researchers and farmers in Brazil
This paper discusses the current regulation of genetically modified organisms and derivatives used in Brazil, where GM-plants are on the verge of being approved for commercial use. The paper further uses a simulation model to assess the potential economic benefits resulting from unrestricted commercial approval of herbicide-tolerant soybeans and some other crops on the Brazilian economy. Only ...
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Tissue-specific expression of rice CYP72A21 induced by auxins and herbicides
Cytochrome monooxygenase P450s (CYPs) comprise one of the largest enzyme families in plants. Some P450s are involved in xenobiotic metabolism: they confer herbicide tolerance and are induced by chemical treatments. We isolated a novel P450 cDNA, CYP72A21 (accession number, AB237166), from rice (Oryza sativa L. cv. Nipponbare) seedlings treated with a mixture of 2,4-dichlorophenoxyacetic acid ...
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Variation in characteristics and imazamox tolerance of feral rye
Rye (Secale cereale L.) is a minor crop in America, with similarities to wheat (Triticum aestivum L.) in growth habit and distribution. However, feral rye has become a weed in wheat. Little is known about variation in feral rye morphological characteristics that influence success of cultural controls. Thus, 21 feral rye populations were sampled from wheat fields in central Oklahoma to ...
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Genetically modified crops, factor endowments, biased technological change, wages and poverty reduction
Genetically Modified (GM), Herbicide Tolerant (HT) white maize, developed in the USA to save labour, is being grown by smallholders in KwaZulu Natal, South Africa. This paper uses panel data for Africa, Asia and Latin America to investigate the effects of factor endowments and biased technological change on productivity growth, labour incomes and poverty reduction. Preliminary results show that ...
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The economic impact of transgenic crops in developing countries: a note on the methods
A vast literature has accumulated since crop varieties with transgenic resistance to insects and herbicide tolerance were released to farmers in 1996 and 1997. A comparatively minor segment of this literature consists of studies conducted by agricultural economists to measure the farm-level impact of transgenic crop varieties, the size and distribution of the economic benefits from adopting them ...
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Efficacy of herbicide seed treatments for controlling striga infestation of sorghum
Witchweed (Striga spp.) infestations are the greatest obstacle to sorghum [Sorghum bicolor (L.) Moench] grain production in many areas in Africa. The objective of this study was to evaluate the efficacy of herbicide seed treatments for controlling Striga infestation of sorghum. Seeds of an acetolactate synthase (ALS) herbicide–tolerant sorghum hybrid were treated with two ALS-inhibiting ...
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Why consider pre-emergent herbicide?
Resistant weeds, dicamba training, new EPA rules and regulations, and ag companies being bought or merging together have been a few of the topics found in many ag media and publications this winter. In summary, things are continually changing in agriculture and will continue to change. One of those changes that many, if not all growers, have experienced is how to deal with weed resistance. ...
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Biotechnology Forecast for 2019
The last few years have witnessed explosive growth within biotechnology across all segments of the industry. It is estimated that the global biotech market will command $727.1 Billion USD by 2025. Biotech looks poised to continue this meteoric growth for 2019 and beyond. With Compounded Annual Growth rates (CAGR) rates across segments ranging from 6%-11%, here is a look at key segments within ...
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Inheritance of susceptibility to ethametsulfuron herbicide muster in summer turnip rape (Brassica rapa L.)
The Brassica oilseed crops, Brassica rapa L., B. napus L., and B. juncea (L.) Czern. & Coss., carry the inherent property of tolerance to the acetolactate synthase–inhibiting herbicide ethametsulfuron. However, a self-compatible line of B. rapa subsp. oleifera (DC.) Metzg. susceptible to this herbicide was isolated through single-plant selection in a Canadian cultivar. The objective of the ...
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A New Generation of GMOs
Is synthetic biology on its way to our farms, markets and tables? Thousands of researchers will descend on Boston this fall for an event billed as the world’s largest gathering of synthetic biologists. The field is evolving so rapidly that even scientists working in it don’t agree on a definition, but at its core synthetic biology involves bringing engineering principles to ...
By Ensia
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