Malaysian tropical rainforest has been reported to home for more than 15,000 species of flora and fauna. The plants represent diversed lifeform of trees, shrubs, herbs, climbers, creepers, ferns, palms, liana, parasite and saprophyte. These plants diversity give substantial contribution to richness of plants for foods, beverages, medicinal and ornamentals. The number does not include species which have not been documented due to limited distributions or restricted to only a certain microclimate. Most lowland tropical rainforest has been logged and replanted with agriculture crops such as rubber, palm oil, coconuts and cocoa, whilst others being developed into new township, settlement and infrastructures such as highways and dam. Slim Forest Reserve is a reserve that composed small acerage of lowland tropical rainforest. The proposed study is important and necessary to be pursued for identification of plants and animals diversity (biodiversity), because majority of tropical rainforest b.....

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Five plants species; Cymbopogon nardus (serai wangi), Cymbopogon citratus (serai makan), Citrus hystrix (limau purut), Citrus limon (limau nipis) and Polygonum sp. (daun kesum) have been selected based on their aromatic properties. Air-dried samples were extracted using three different organic solvents; (hexane, chloroform, and ethanol). Extracts then were dried using the rotary evaporator. Aromatic samples were hydrodistilled for their essential oil and analyzed for the determination of chemical profile such as alkaloids, terpene and flavonoid using the gas chromatography (GC). The essential oil was tested on their repellent or attractant properties using guinea pigs and mosquitoes. Most extracts showed repellent properties. Keywords: Screening, insect repellent, insect attractant, alkaloid, flavonoid, terpene...

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