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Simulation of control strategies for decision-making regarding Digitaria sanguinalis in glyphosate-resistant soybeans Ciencia e Investigación Agraria
Oreja,Fernando H; Bastida,Fernando; Gonzalez-Andújar,José L.
A bioeconomic model was developed for decision-making regarding large crabgrass (Digitaria sanguinalis) control in glyphosate-resistant soybeans in the Rolling Pampas ofArgentina. The model was used to evaluate the economic returns of four different glyphosate-based strategies for weed control. In the absence of herbicide application (T1), the soil seed bank increases to an equilibrium density of 12,079 seeds m-2 in three years. A single herbicide application during the early stages of the crop (T2), which was intended to be highly effective in the control of an early weed cohort, allows a late, unaffected cohort to produce sufficient seeds to maintain population densities in the soil seed bank. A single, delayed herbicide application (T3), which was...
Tipo: Journal article Palavras-chave: Crop-weed competition; Digitaria; Herbicides; Glycine max; Large crabgrass; Sensitivity analysis; Transgenic crop.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000200006
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The Environmental Effects of Genetically Modified Crops Resistant to Insects Neotropical Entomology
FONTES,ELIANA M.G.; PIRES,CARMEN S.S.; SUJII,EDISON R.; PANIZZI,ANTÔNIO R..
Transgenic crops are currently being cultivated on a commercial scale in many countries. The area devoted to transgenic pest resistant varieties worldwide reached 13 million hectares in 2001. These varieties offer valuable benefits but also pose potential risks. Assessments of their impact on the environment are conducted before they are approved for commercial use, as required by the regulatory biosafety frameworks. In this review, we discuss the potential ecological consequences of the commercial use in agriculture of genetically modified insect resistant crops. We also discuss the impacts caused by the change in agricultural practices, and attempt to identify gaps and possible opportunities for research, considering this new technological tool. We based...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Transgenic crop; Bt gene; Non-target organism; Gene flow; Biosafety.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2002000400001
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