Revista Brasileira De Herbicidas 2014; 13(1): 1-7
Efficiency of the application of the mixture of glyphosate with saflufenacil on Brachiaria decumbens plants
The aim of this work was to investigate the synergism or antagonism of glyphosate with and without mixing with saflufenacil to control B. decumbens. The following treatments were evaluated: glyphosate (1.080); glyphosate + saflufenacil + Dash (1,080 + 24.5 + 0.5 % v/v); glyphosate + 2,4-D (1,080 + 720); glyphosate (1,440); glyphosate + saflufenacil + Dash (1,440 + 24.5 + 0.5% v/v); glyphosate + 2,4-D (1,440 + 720); saflufenacil + Dash (24.5 + 0.5 v/v); 2,4-D (720), doses in g a.i./e.a. ha-1. The efficiency control of Brachiaria decumbens was evaluated at different times: 3, 7, 14, 21, 28, 35, 42 and 49 days after application (DAA), with basis on phytotoxicity symptoms, using the scale of 0 % to 100%. The results were submitted to the F test and the average values were compared using Tukey test at 5 % probability. The herbicide glyphosate applied isolated at both tested doses, or mixed with saflufenacil, provided excellent control of B. decumbens after 14 days. Saflufenacil and 2,4-D when applied isolated without the presence of glyphosate were ineffective in controlling plants. The control of B. decumbens provided by mixtures of glyphosate with 2,4-D and saflufenacil was similar to the application of glyphosate isolated. Mixtures showed no synergism or antagonism on the control of B. decumbens plants.
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