Revista Brasileira De Herbicidas 2002; 3(2-3): 123-126
The efficiency of glyphosate in the control of Brachiaria decumbens in guariroba crop (Syagrus oleracea)
This study was carried out to analyze the use, in total area, of different doses of glyphosate in guariroba crop to control Brachiaria decumbens in post-emergence. The commercial product Roundup Transorb (648 g of glyphosate 1L) was applied at the doses of: 972,1215,1458,1701 and 1944 g/ha. The experimental design was arandom blocks, with four repetitions. The volume of solution applied was 2001 L/ha, at a temperature of26°C and relative humidity of 84%, by the use of a manual sprayer, pressured by C02 at 32 lb/in’, with six flat nozzles TI 110.02. Phytotoxicity and the control of Brachiaria decumbens were analyzed 6, 12,21 and 31 days after chemical application (DAA).1t was conclued that the species Syagrus oleracea was highly tolerant to the herbicide glyphosate, even at the highest studied dose and the herbicide glyphosate independent1y of the studied dose, was very efficient in the control of young Brachiaria decumbens plants, exerting 100% control.
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