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Glyphosate is a non-selective herbicide used for weed control in eucalyptus forests. Glyphosate drifts are common and may cause serious damage to c rops. An alternative to reduce such effects is to u se antidotes capable of protecting eucalyptus. An expe riment was conducted to evaluate the effects of the application of liquid fertilizer on eucalyptus plan ts subjected to a glyphosate drift simulation. The treatments were arranged in a 5 x 5 factorial design. The firs t corresponding factor was liquid fertilizer (0, 1, 2, 4, and 8 L c.p. ha of Fertiactyl Pós ) and the second factor dose of glyphosate drift (0 , 36 , 720, 1,440, and 2,160 g e.a. ha). The products were applied together so that the s pray did not reach the upper third of the plants. A t 7, 28, and 49 days after application (DAA), the percentage of intoxication of eucalyptus was evaluated. At 56 days DAA, height, leaf area, leaf nutrient contents, and shoot and root dry matter were determined. Higher doses of glyphosate (1,440 and 2,160 g ha ) caused intoxication levels above 90% at 28 and 49 DAA without using liquid fertilizer. The combination of 2,160 g ha -1 of glyphosate with 8.0 L ha -1 of liquid fertilizer resulted in an estimated eucalyptus dry matter 7% higher than in t he control and 97% higher than using 2,160 g ha -1 of glyphosate without the liquid fertilizer. We conclu de that the liquid fertilizer was effective in supp ressing the harmful effects caused by glyphosate on eucalyptus lants.

USE OF LIQUID FERTILIZER TO REDUCE THE PHYTOTOXIC EFFECTS OF GLYPHOSATE ON EUCALYPTUS