Essential Leaf Oils From Melaleuca Cajuputi

Abstract

Hydrodistillation of cajuput (Melaleuca cajuputi) leaves collected from 6 sites in Narathiwat gave different yields of cajuput oils. The maximum oil yield (0.97%) was obtained from leaves from Ban Koke Kuwae, Thambon Kosit, and Amphur Tak Bai. The oil yields from leaf samples of other sites were 0.84% from Ban Pha Ye and Thambon Sungai Padi in Amphur Sungai Padi; 0.76% from Ban Lubosama, and Thambon Pasemat, in Amphur Sungai Kolok; 0.70% from Ban Tha Se, and Thambon Kosit, in Amphur Tak Bai; 0.66% from Ban Mai, and Thambon Sungai Padi, in Amphur Sungai Padi; and 0.56% from Ban Toh Daeng, and Thambon Phuyoh, in Amphur Sungai Kolok. Cajuput oil densities from the 2 sites of Amphur Sungai Kolok and from Ban Mai, Thambon Sungai Padi, Amphur Sungai Padi were almost the same, but higher than others. Although major components were not different, the minor components varied in terms of both structure and proportion. The major compositions of both cajuput oils from Ban Toh Daeng, Thambon Phuyoh, and Amphur Sungai Kolok consisted of 49.22% monoterpenes and 46.45% sesquiterpenes, and the rest were hydrocarbons and a diterpene. Other cajuput oils obtained composed mainly of monoterpenes (more than 62%), sesquiterpenes, hydrocarbons and some unknown compounds respectively. There was no diterpene present in these oils. Since cajuput oil was locally used as insecticide, termicidal activities of all oils were also investigated.

Chemical Composition of Melaleuca Cajuputi Powell

“…Although most of the previous study found high yield of 1,8-cineole [12], this research found differentcompound name caryophyllene in the highest percentage. It is similar with study that no 1,8-cineole or contained very lowquantity (< 3%) of this compound in those areas [13]. Nevertheless, it was reported that active compound 1,8-cineole can cause skin irritation even in low quantities.…”

“…The differences of essential oils in chemical constituents depend on many factors such as climaticchanges and soils type. Geographic variation also affected the chemical composition of oils from leaves [13]. Reference [18] claimed that thefactor influencing the qualityessential oils include variety of plant species, cultivatingprocess, maturation plants, plant storage and methods of extraction.…”

Antitermite Activities ofC. deciduaExtracts and Pure Compounds against Indian White TermiteOdontotermes obesus(Isoptera: Odontotermitidae)

“…Besides plant extracts, essential oils have also shown very strong repellent and toxic activity against Formosan subterranean termite due to presence of volatile compounds [43]. Moreover, plant origin monoterpenes were proved highly toxic to Coptotermes formosanus [44].…”

Coastal Landscapes of Peninsular Malaysia: The Changes and Implications for Their Resilience and Ecosystem Services

“…Gelam provides a renewable resource of woods and poles and potentially can be used to produce cajuput oil, a secondary compound from its leaves which may be useful for pharmaceutical industry. The 'cajuput' oil industry is surviving well in Indonesia [32] and Thailand [33]. However, similar industry is still untapped in Malaysia or Terengganu, possibly due to low essential oil content in its leaves, about <1% of it dry weight [34].…”