This study aimed to verify the efficacy of essential oils from Lippiagracilis on the in vitro growth of Xcv. Eightoils were extracted from L. gracilis and obtained from different cultivation management types at three different doses (200, 250 and300 µL.L-1), control using copper oxychloride (standard control) and absolute control. The susceptibility of the isolate Xcv3 to the tested oils was evaluated in the first step based on the presence and absence of bacterial growth, and in the second step based on the percentage of bacterial growth inhibition. Analysis of the chemical composition of essential oils extracted from L. gracilis showed carvacrol (73.9 to 77%) as the major compound, and thymol (4.9 to 10.3%). The oils corresponding to treatments 01, 06 and 07 provided the largest percentages of Xcv bacterial growth inhibition: 94.75%, 96.50% and 94.02%, respectively, greater than that of copper oxychloride (49.6%).
thymol; carvacrol; antimicrobial action; copper oxychloride; grapevine canker disease
