Means with the same letters do not differ statistically by Tukey test (p < 0.05). NC: negative control (seeds treated with water, oil-free); PC: seeds previously treated with commercial fungicide (positive control, oil-free); ST: seeds previously treated with essential oil; ST/11- seeds previously treated with essential oil + 11 weekly applications of oil at same concentration; ST/9- ibid + 9 applications of decennial oil at the same concentration; ST/6- ibid + 6 biweekly applications of oil at the same concentration; and ST/3- ibid + 3 monthly applications of oil at the same concentration.