Insecticidal activities and repellent effects of methylcinnamate and essential oils fromAlpinia galangalagainst nymphs and adults ofMetcalfa pruinosa

Abstract

Metcalfa pruinosa is a pest causing widespread problems to many crops in Korea. This pest infects fruit crops especially, persimmon and grapes. We tested the possibility of M. pruinosa management using essential oils of Alpina galangal and methylcinnamate which were extracted from A. galangal by steam distillation method. The use of essential oil showed a mortality rate of 10.0 and 23.3% for adults and nymphs, respectively. While the use of methylcinnamate resulted to a mortality rate of 40.0% in adults and 36.6% in nymphs. For its repellent effect, it showed an avoidance rate of 50.0 and 63.3% for adult and nymph respectively. Considering these two results, the extract of A. galangal are shown to have some synergic effect for pest control. The result of this study showed a possibility of M. pruinosa control using essential oil and methylcinnamate from A. galangal.

Antioxidant and anti-aging effects of Alpinia galanga L. rhizome extracts and preservation of antioxidant effects in W/O type emulsion

“…양강근 등으로도 불리는 갈랑가는 약 1.5 m 정도 자라며 잎은 타원형의 덩이줄기가 있고 고유의 독 특한 향이 나며 톡 쏘는 맛을 가지고 있기 때문에 향신료로 사 용되기도 한다. 갈랑가의 뿌리줄기에서 추출한 에센셜 오일은 박테리아, 곰팡이, 효모 및 기생충에 대한 항균 작용을 가지고 있다는 연구결과가 있다 [17,18]. 그 뿐만 아니라 여드름 원인균 중 하나인 표피포도상구균에도 항균활성을 나타내는 것으로 보 고되었다 [19].…”