The use of eucalyptus oils in consumer products

Insect repellents As noted in the introduction, Eucalyptus citriodora oil has been used as a ‘natural’ insect repellent. Depending on the product formulation it is used in, Lemon Eucalyptus (known as Quwenling in China) is up to four or five times more effective and longer-lasting than citronella oil (from Cymbopogon nardus), one of the best known natural insect repellents. p-Menthane-3,8-diol is the main active component of Quwenling and this can be isolated and used as a highly effective insect repellent. Eucalyptus citriodora oil contains up to 80–90 per cent citronellal, along with geraniol, both of which are known to have insect repellent activity but tend to dilute the much higher activity of the p-menthane-3,8-diol. The Mosi-guard Natural insect repellent spray produced by MASTA in the UK contains ‘Extract of Lemon Eucalyptus’ and claims on the label: Approved and recommended by the London School of Hygiene and Tropical Medicine. Field trials have shown effective protection for 6 h after a single application in mosquito infected areas. Also protects against many other biting insects. Mosi-guard Natural is made from a natural and renewable resource. It is kind to your skin and has no adverse effects Read more […]

Black Nightshade, Terong Meranti, Poison Berry

Solanum nigrum L. (Solanaceae) Solanum nigrum L. is a small herb, up to 1.5 m tall. Leaves are ovate, ovate-oblong, glabrous, hairy, 1-16 cm by 0.25-12 cm. Inflorescence of 2-10 in an extra-axillary cluster, with white or purple corolla and yellow central protrusion. Fruit is globose, black in colour but is green when immature, 0.5 cm in diameter, with many seeds. Origin Native to Southwest Asia, Europe, India and Japan. Phytoconstituents Solanidine, α-, β-, γ-chaconine, desgalactotigonin, α-, β-solamargine, diosgenin, solanadiol, α-, β-, γ-solanines, soladulcidine, solanocapsine, α-, β-solansodamine, solasodine, α-solasonine, tigogenin, tomatidenol, uttronins A and B, uttrosides A and B, solanigroside A-H and others. Traditional Medicinal Uses The stem, leaves and roots are used as a decoction for wounds, tumours and cancerous growths, sores and as an astringent. They are also used as a condiment, stimulant, tonic, for treatment of piles, dysentery, abdominal pain, inflammation of bladder, relief of asthma, bronchitis, coughs, eye ailments, itch, psoriasis, skin diseases, eczema, ulcer, relief of cramps, rheumatism, neuralgia and expulsion of excess fluids. The roots are used as an expectorant. The Read more […]