Publicação on-line; 27 ref.; 2 tables; 2 illus.; Summary (En)

ABSTRACT

The objective of this article was to evaluate the effects of glyphosate on the initial development
of eucalyptus (Eucalyptus urograndis) after its application on brachiaria (signal) grass plants
(Brachiaria decumbens). The experiment was conducted in a greenhouse in a completely
randomized design. Glyphosate, aminomethylphosphonic acid (AMPA) and shikimic acid
concentrations were determined, along with an intoxication evaluation of the eucalyptus plant
pointers and dry mass of the plants. Glyphosate was detected in eucalyptus plants after its
application on B. decumbens plants, but the eucalyptus plants only presented low intoxication
levels in the pointer’s leaves. No AMPA was detected in eucalyptus leaves, and only a dose of
1,440 g e.a. ha-1 of glyphosate reduced the total dry mass of eucalyptus plants. Glyphosate has
the potential to cause intoxication in the crop when applied to adjacent plants.

Keywords: absorption, Brachiaria decumbens, Eucalyptus urograndis, herbicide, interference.