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The chemical constituents, larvicidal and antimicrobial activities of hydrodistilled essential oils from the leaves and rhizomes of  Hedychium stenopetalum  Lodd. and  Hedychium villosum  Wall. from Vietnam are reported. The main constituents of both essential oils were α-pinene (8.5%-21.6%) and β-pinene (32.2%-52.2%). Linalool (28.5%) and 1,8-cineole (10.7%) were identified in the rhizomes of  H. stenopetalum  and  H. villosum , respectively. Essential oils from leaf and rhizome of  H. stenopetalum  exhibited larvicidal activity against  Aedes aegypti  with median lethal concentrations (LC 50 ) values of 16.33 μg/mL and 19.37 μg/mL, at 24 h, respectively. The lethal concentration required to kill 90% of population exposed (LC 90 ) values at the same test period were 49.76 μg/mL and 26.19 μg/mL, respectively. On the other hand,  H. villosum  oils were the most active against  Culex quiquefasciatus  with LC 50  values of 19.58 μg/mL (LC 90  value of 26.67 μg/mL) and 19.78 μg/mL (LC 90  value of 27.13 μg/mL), respectively.  Hedychium villosum  oils showed antimicrobial activity against  Staphylococcus aureus  ATCC25923,  Bacillus cereus  ATCC14579 and  Candida albicans  ATCC10231 with minimum inhibitory concentrations (MIC) values between 7.66 µg/mL and 8.57 µg/mL.  H. stenopetalum  leaf oil displayed antimicrobial activity towards  Enterococcus faecalis  ATCC299212 (MIC 7.88 µg/mL). The results may provide basis for further exploitation of  H. stenopetalum  and  H. villosum  as larvicidal and antimicrobial agents.

journal of essential oil bearing plants

Chemical Compositions, Mosquito Larvicidal and Antimicrobial Activities of Essential Oils of  Hedychium stenopetalum  Lodd. and  Hedychium villosum  Wall. of Zingiberaceae from Vietnam