Revista Brasileira De Herbicidas 2001; 2(1-2): 43-48
Efficacy oftrifluralin formulations and doses in soybean
The objective ofthis study was to evaluate the efficacy of different formulations oftrifluralin to control grass weeds in soybean (cv. Garimpo) on a Red-Yellow Latossolo, with a sandy texture, in Uberaba, MG, Brazil. The treatments were: trifluran WG (500 g/l) at 750 and 1000 g/ha, trifluralin EC (600 g/I) at 720 g/ha and trifluralin EC (445 g/l) at 667 g/ha, as well as an unweeded and a weeded control. The experimental design was a complete randomized block with four replications. The two trifluralin formulations (WG and EC) controlled 80-90% of Brachiaria decumbens and B. p/antaginea. The agronomic characteristics of soybean such as productivity, plant height, first pod insertion, seed weight, and mechanical harvest indice, were not affected by the formulations nor doses of trifluralin. The’ herbicide also did not provoke toxicity to the soybean. However, a slight superiority of the EC formulation in the early control of Brachiaria decumbens (15 days after herbicide application) and late control (45 days after herbicide application) of B. plantaginea was noticed.
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