Effect of Fertiactyl on the absorption and translocation of C-glyphosate in young eucalyptus plants.

Fertiactyl is a foliar fertilizer with the potential to minimize the phytotoxicity effects caused by glyphosate drift in eucalyptus plants. As the interactions of the glyphosate and Fertiactyl in tank mix on the plant behavior are not yet known, the objective was to evaluate the absorption and translocation of C-glyphosate, applied isolated and mixed in tank with Fertiactyl, in young eucalyptus plants (clone I-144, x ). The addition of Fertiactyl to the mixture of C-glyphosate reduced the absorption by 94.3% in relation to the total absorbed at the end of the evaluation compared to plants treated only with C-glyphosate, i.e., Fertiactyl protected the eucalyptus plants of the glyphosate intoxication by drift. The translocation rates from the treated leaves to the rest of the shoots and roots were low (<2% of the total recovered) in both treatments, suggest that restricted translocation is a mechanism of natural tolerance to glyphosate in plants of clone I-144. It is concluded that Fertiactyl, mixed in the solution with glyphosate, protects young eucalyptus plants against glyphosate drift by reducing the amount of herbicide absorbed.