Search Results for: Sorghum

Abstract: Johnsongrass is one of the most troublesome weeds of the world and is listed as a noxious weed in Arkansas. Reduced johnsongrass control with the recommended application rate of glyphosate (840 g ae ha21) was reported in a continuous soybean field near West Memphis, AR, in the fall of 2007. A greenhouse study was …

Abstract: Kochia scoparia is a troublesome weed across the Great Plains of North America. Glyphosate and dicamba have been used for decades to control K. scoparia. Due to extensive selection, glyphosate- and dicamba-resistant (GDR) K. scoparia have evolved in the USA. Herbicide mixtures are routinely used to improve weed control. Herbicide interactions if result in …

Abstract: Glyphosate-based herbicides are leading products of the current pesticide market, and this trend has further strengthened outside Europe with the spread of glyphosate-tolerant GM crops. Glyphosate forms complexes with metal ions (Al, Fe, Mn, Zn) in the soil, but precipitation washes it into deeper soil layers. Its primary metabolite, AMPA, is more mobile than …

Abstract: In this study, the environmental impacts of large scale bioenergy crops were evaluated using the Soil and Water Assessment Tool (SWAT). Daily pesticide concentration data for a study area consisting of four large watersheds located in Michigan (totaling 53,358 km²) was estimated over a six year period (2000-2005). Model outputs for atrazine, bromoxynil, glyphosate, …

Abstract: Ninety % of first generation GM plants evaluated in EU serve plant protection purpose. Twenty % are “insect”-resistant (Bt), 30% are “herbicide”- tolerant (glyphosate) and the further 40% are the combination of the mentioned two types. Pesticide resistance for an active ingredient used in a longer period is developed sooner or later in treated …

Text: In recent years, there have been many claims that plant breeding would be radically altered by the new products of genetic engineering and by the adverse effects of genetic erosion. While there is little doubt that both of these forces will affect breeding procedures in the long term, their immediate effects, i.e., over the …

Abstract: This note examines costs and returns from the cultivation of different types of cotton in a rainfed village in the Vidarbha region of Maharashtra, India. While the pros and cons of GM cotton are extensively debated, there are only a few empirical studies on the economic performance of Bt cotton, particularly under rainfed conditions. …

Abstract: Glyphosate is the world’s most important herbicide, with many uses that deliver effective and sustained control of a wide spectrum of unwanted (weedy) plant species. Until recently there were relatively few reports of weedy plant species evolving resistance to glyphosate. Since 1996, the advent and subsequent high adoption of transgenic glyphosate-resistant crops in the …

Abstract: Herbicide resistance is an evolutionary event resulting from intense herbicide selection over genetically diverse weed populations. In South America, orchard, cereal and legume cropping systems show a strong dependence on glyphosate to control weeds. The goal of this report is to review the current knowledge on cases of evolved glyphosate-resistant weeds in South American …

Text: It is hard to ignore the ongoing, often emotional, public discussion of the impacts of the products of crop biotechnology. At one extreme of the hype is self-rightoeus panic, and at the other is smug optimism. While the controversy plays out in the press, dozens of scientific workshops, symposia, and other meetings have been …