Abstract
Mentha species belongs to Lamiaceae family is an important industrial crop, cultivated commercially on large scale. In this study, a common cultivar of M. arvensis with a high essential oil content (Cim Kranti) was investigated to determine the impact of drying techniques for 10 days immediately following harvest on the essential oil content and its chemical profile under three conditions: open field (S1), shade (S2), and ventilated chamber (S3). According to results, significantly higher essential oil (0.723%) with 77.58 % of menthol content was observed in freshly harvested crop on same /1st day of harvest (T1) than any other conditions. M. arvensis was harvested and drying in open field condition (S1) has showed 0.68% of essential oil having rich amount of menthol (76.86 % ) content on fresh sample (T1) which decline to 0.51% essential oil content with menthol content 76.88% at 10th days after harvest. M. arvensis dying in ventilated room (S3) showed essential oil (0.71%) and menthol content 76.58 % on same day of harvest, which later decreases upto 0.6% essential oil with menthol content 74.32% on 10th day after harvest. Results concluded that the best quality and high yield of essential oil of M. arvensis should willingly be distilled fresh just after harvest. It also indicates that postharvest processes should immediately followed harvesting with appropriate drying method to minimize the loss of high quality essential oil.
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