![]() ![]() Intoxication was measured by visual evaluation, attributing scores from 0 (no symptoms of intoxication) to 100% (plant death) performed at 7, 14, 21, and 28 days after the application of the herbicides. Data referring to doses of 0, ¼, ½ and 1 times the commercial dose were used to assess intoxication. For the height, stem diameter, shoot dry mass, and chlorophyll content variables, data referring to the application of commercial doses of each herbicide and the control treatment were analyzed. Chlorophyll content (SPAD index) was measured with a chlorophyll meter (SPAD–502 PLUS). The aerial part dry mass was collected 120 days after applying the herbicides and placed in a forced circulation oven at 60 ☌ until at constant weight. Height was measured with a ruler, and stem diameter with a digital caliper. The increment measures (between the final and initial) were used in the analyses and tables. The height and stem diameter variables were measured on the day of herbicide application, and after 120 days, increments were calculated based on the difference between final and initial measurements. The fertilizer intensified treatment symptoms with clomazone and diuron + sulfentrazone in Clone AEC 144 and with sulfentrazone and diuron + sulfentrazone in Clone AEC 2034. Foliar fertilization reduced the intoxication caused by indaziflam in Clone AEC 056. The eucalyptus seedlings were generally more sensitive to indaziflam and glyphosate + S-metolachlor herbicides. Among the evaluated clones, Clone AEC 144 had more significant changes in the analyzed variables in treatments with herbicides and foliar fertilizer application. The herbicides indaziflam and glyphosate + S-metolachlor were the most harmful to the tested eucalyptus clones, interfering with the growth variables. Height, stem diameter, shoot dry mass, chlorophyll content, and visual intoxication were the analyzed variables. For this, a field experiment was carried out with the application of the products indaziflam, clomazone, glyphosate + S-metolachlor, sulfentrazone, and diuron + sulfentrazone, plus the application of an additional foliar fertilizer (composition in g/L of 78, 13, 40.3, 1.17, 0.78, 16.9, 13, 14.3, 0.52, and 29.9, respectively, for C, N, S, B, Co, Fe, Cu, Mn, Mo, and Zn). Thus, the objective of this work was to evaluate the sensitivity of eucalyptus clones subjected to herbicides applied postemergence and associated with the application of foliar fertilizer. Foliar fertilization can improve seedling development and mitigate the effects of herbicides on eucalyptus. Postemergence application of herbicides can cause phytotoxicity problems in eucalyptus seedlings. ![]()
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