Floresta e Ambiente
https://floram.org/article/doi/10.1590/2179-8087.047416
Floresta e Ambiente
Original Article Silviculture

Effects of Glyphosate on Eucalyptus After its Application on Brachiaria (Signal) Grass

Edicarlos Batista de Castro; Caio Antonio Carbonari; Edivaldo Domingues Velini; Gabrielle de Castro Macedo; Plínio Saulo Simões

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Abstract

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

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