T Venukasan
Department of Forestry and Environmental Science
University of Sri Jayewardenpura, Sri Lanka
Non-timber
forest products (NTFPs) are any product or service other than timber that is
produced in forests. They include fruits and nuts, vegetables, fish and game,
medicinal plants, resins, essences and a range of barks and fibres such as
bamboo, rattans, and a host of other palms and grasses.
Here forest products can be classified into two main
pats timber and non-timber forest products where scope of this study remains at
essential oils mainly focusing on Agarwood and Sandalwood.
Agarwood
is aromatic, dark, fragrant resinous substance that is produced by certain
plant members of family Thymaleaceae including specially Gyrinops and Aquilaria
trees. It has a high demand in globally and considered as the most expensive
wood in the world. Agarwood
resin formation due to natural reasons is rare and slow. Therefore resin
formation is induced at commercial scale using different techniques. Both the
quantity and quality of Agarwood resins is dependent on the inducement
technique and therefore the use of the right method is vital to increase the
product quality and income. Sandalwood
oil is extracted from wood and roots of the tree. Sandalwood oil has a
characteristic sweet, woody odour which is widely employed in the fragrance
industry, but more particularly in the higher-priced perfumes. And also it is
used in aromatherapy, cosmetic industry and to prepare soaps due to the antimicrobial
activity. Unlike other aromatic wood they retain their fragrance for decades.
Citronella
oil production can be highly promoted among local communities though it has
been declined as it makes high profits in international market. Citronella oil
is a source of important perfumery chemicals which find extensive use in soap,
perfumery, cosmetic and flavouring industries. Leaves of Citronella plant are
distilled to obtain valuable oil. It
is a common mosquito repellent and also used in indigenous medicine as well as
in flavouring food and alcoholic drinks in certain countries.
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