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Planta Daninha

Print version ISSN 0100-8358

Abstract

MARTINS, Dagoberto et al. Chemical aquatic weed control in resevoir. Planta daninha [online]. 1999, vol.17, n.2, pp. 289-296. ISSN 0100-8358.  http://dx.doi.org/10.1590/S0100-83581999000200013.

In 1998 were carried out four trials in Brazil to studied the effect of herbicides on weed aquatic control in reservoir. The herbicides and dosis used were: imzapyr at 125, 250, 500, 1.000, 1.500 e 2.000 g /ha, 2,4 D at 1.200 g/ha, glyphosate at 3.360 g/ha and a treatment without herbicides applyed. The research was conducted in randomized completely block design with four replications. The plots were constituted by reservoirs with 60x60x60 cm dimensions. All herbicides and dosis were excellent to E. crassipes control. The 2,4 D and glyphosate did not promotion a good control of P. stratiotes. The Imazapyr application showed a excellent control to P. stratiotes whem the dosis applyed were above 125 g/ha, except 2,4 D. All herbicides were efficient to T. subulata control, except imazapyr at 125 g/ha. There was sprouted of T. subulata whem 2,4 D was applyed. None of herbicides was efficient to S. molesta control.

Keywords : Weed; imazapyr; 2,4 D; glyphosate.

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