Influência da cobertura morta no comportamento dos herbicidas imazaquin e clomazone The influence of straw mulch on the behaviour of the residual herbicides imazaquin and clomazone

Experimentos de campo e bioensaios em casa-de-vegetação foram realizados para se estudar a influência da cobertura morta de trigo (Triticum aestivum L.) no comportamento dos herbicidas imazaquin {ácido 2-[4,5 dihidro-4-metil-4-(1-metiletil)-5-oxo-1H-imidazol-2-ilo]-3-quinolinacarboxílico} e clomazone {2-[(2-clorofenil)metil]-4,4-dimetil-3-isoxazolidinona}, aplicados em pré-emergência na cultura da soja [Glycine max (L.) Merril], no sistema de plantio direto. O clomazone mostrou evidências de ter sido interceptado pela cobertura morta. A presença da cobertura morta não influiu na retenção do imazaquin, sendo este lixiviado da palha para o solo com as chuvas que ocorreram após a aplicação.<br>Field experiments and glass house bioassays were conducted to determine the influence of winter wheat (Triticum aestivum L.) straw mulch on the behaviour of the herbicides imazaquin {2-[4,5-dihydro-4-methyl-4-(1-ethyl)-5-oxo-1H-imidazol-2-yl]-3-quinolinecarboxylic acid} and clomazone {2-[(2-chlorophenyl)methyl]-4,4-dimethyl-3- isoxazolidinone}, wich had been applied to pre-emergence soybean (Glycine max)in a no-till system. There was evidence that clomazone had been intecepted by the straw whilst imazaquin was leached into the soil by rain

Automobility and the power of sound

This article analyses the connections between forms of solitary automobile habitation and the use of mobile sound technologies in automobiles: the radio, cassette, sound system and mobile phone. It does this through an empirically informed analysis of automobile use. In doing so it re-evaluates our understanding of the occupation of space and place, arguing that traditional concepts of urban space have underestimated the active role that the users of these communication technologies might have in transforming the meaning of these spaces as they pass through them. The article points to the powerful, and potentially problematic, role that sound technologies play in the daily experience of moving through the city