Aminocyclopyrachlor e indaziflam: Seletividade, controle e comportamento no ambiente

Abstract

Os herbicidas aminocyclopyrachlor e indaziflam são duas novas moléculas que estão em fase de desenvolvimento no Brasil. Aminocyclopyrachlor é um mimetizador de auxina, e o indaziflam atua na biossíntese de parede celular e ambos apresentam grande potencial para controle de plantas daninhas em pré-emergência. O aminocyclopyrachlor é seletivo para espécies pertencentes à família Poaceae, enquanto que o indaziflam é pouco seletivo para culturas anuais, estando em desenvolvimento para culturas perenes. Embora apresentem características distintas de sorção ao solo, ambos herbicidas apresentam correlação positiva entre a sorção e o conteúdo de matéria orgânica. A longa persistência da atividade residual no solo das duas moléculas exige que ambas sejam utilizadas com cautela, em função do potencial de carryover.

Persistence of Biological Activity and Leaching Potential of Herbicides Aminocyclopyrachlor and Indaziflam in Soils with Different Textures1

“…Herbicides aminocyclopyrachlor and indaziflam are molecules that are under development in Brazil for the cultivation of sugarcane (Guerra et al, 2013). In the United States, aminocyclopyrachlor is registered for weed control in non-agricultural areas, Persistence of biological activity and leaching potential of ... pastures, forest plantations and nurseries (Turner et al, 2009;Mc Closkey et al, 2011); as for indaziflam, in the United States it is recommended for use on lawns (Kaapro & Hall, 2012) and in Canada for cultivation of some fruit trees (Bayer..., 2012).…”

Soil Factors Effects on the Mineralization, Extractable Residue, and Bound Residue Formation of Aminocyclopyrachlor in Three Tropical Soils

“…It is used in the US since 2010 to control broadleaf weeds and brushes in non-crops areas such as lawns (residential, industrial, and institutional), golf courses, parks, cemeteries, athletic fields, and sod farms [1] and is currently under development in Brazil for the cultivation of sugarcane and pasture [2,3]. Although limited information is known about aminocyclopyrachlor fate in soil, studies reported that this herbicide is highly water soluble, non-volatile, and can be easily leached in soils due to its low sorption capacity and high desorption capacity [4,5].…”

Influence of Precipitation and Sugarcane Straw in Aminocyclopyrachlor and Indaziflam Control Efficiency

“…The aminocyclopyrachlor and indaziflam herbicides are under development in Brazil for the crop of sugarcane (Guerra et al, 2013). Since they are new molecules, there is virtually no literature on the behavior of these herbicides in the raw sugarcane harvesting system.…”