2.6. Statistical analyses
Differences among means for the essential oil production (Fig. 1) was determined by one-way Anova with multiple comparisons by the Tukey test. Mean artemisinin leaf concentrations determined from sohxlet extraction (Fig. 2) were tested by one-way Anova (Kruskal-Wallis). Means of artemisinin extraction efficiency with different solvents using pressurized liquid extraction (PLE), refluxing, and the infusion (tea) methods (Fig. 4) were compared by one-way Anova using multiple comparisons and by the Tukey test.