QUALITY AND CONTENT OF THE ESSENTIAL OIL FROM MENTHA X PIPERITA AFTERAPPLICATION OF TERBACIL

The aim of this work was to study the effect of Terbacil on some quali tative properties of Mentha x piperita (L.) HUDS. cv. Perpeta (pepperm int) during its vegetation. The results have shown that the beginning of bloom may be regarded as a vegetation period giving the highest con tent of the essential oil in herba and leaves of peppermint, and its g reatest amount was found in the youngest leaves. Content of menthol gr adually increased to its top in the blooming phase while that of menth one was decreasing. The treatment of peppermint with Terbacil have not influenced the essential oil content and its changes during vegetatio n when compared with that of untreated plants. Similarly, the applicat ion of a herbicide formulation have not caused detectable changes in r elative representation of main and secondary components of the essenti al oil.