Efectividad biológica de los herbicidas imazethapyr y clorimuron etyl contra arvenses en el cultivo de la soya (Glycine max)
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Abstract
Biological effectiveness on weeds of imazethapyr 10 % CE (0.08-0.15 kg/ha a.i.) and chlorimuron 25 % GD (0.0075-0.0125 kg/ha a.i.) were evaluated in experiment and extension phases on direct sowing of soybean, and residual effect by indicative plants method. In both experiments treatments applications were executed in post-emergent on broadleaves weeds of 2-4 leaves stage on Red Ferralític soil, during rainy season. Both herbicides were selective to soybean and effective against broadleaves weeds and some annual grasses in their first stage, without affecting yield and with similar behavior that production standard fomesafen 0.125 kg/ha a.i. Residual analyses carried out with indicative plants one week before cropping detected affectation levels from middle to high, which indicates the possibility to define posible cultivations to alternate in function of residuals levels persistent in soil.
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References
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