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The chemical composition of leaves and flowers essential oils of Lantana camara from India were analysed by GC and GC-MS, which resulted in the identification of 71 and 64 constituents, representing 99.0% and 97.0% of the oils, respectively. The major constituents in the leaf oil were germacrene-D (20.5%), -elemene (10.3%),ˇ-caryophyllene (9.4%),ˇ-elemene (7.3%),˛-copaene (5.0%) and˛-cadinene (3.3%), while the major constituents in the flower oil wereˇ-elemene (14.5%), germacrene-D (10.6%),˛-copaene (10.7%),˛-cadinene (7.2%),ˇ-caryophyllene (7.0%) and -elemene (6.8%). A comparison with the chemical composition of L. camara oils of different origin showed that our oils were significantly different from others with respect to their major constituents.

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The chemical composition of essential oils isolated from six different cultivars of corn mint grown at CIMAP Field Station, Pantnagar, were compared: menthol (77.5-89.3%) was the main constituent of all the cultivars, followed by menthone (0.3-7.9%) and isomenthone (3.7-6.1%). The oil of MAS-1 cultivar contained the highest concentration of menthol (89.3%) but the lowest percentage of menthone (0.3%), while isomenthone was not detected. Although the compositions of the six oils were similar, quantitative differences in the concentration of some constituents was observed. Yield and quality appraisals in the study led to the identification of the cultivars Kosi, Himalaya and Damroo as the most potent genotypes for maintaining mint crop diversity and productivity stability.