Anti Lice Oil from Guyabano (Annona Muricata L.) Seed Extract

3952 Words Jan 22nd, 2013 16 Pages

Soursop, also known as guyabano in the Philippines is prominent three times a year; every summer, rainy season and even during Christmas. This kind of fruit is eaten but the tendency of some people is throw away the seeds of it. There are instances that these seeds are used to plant such trees. Some people think that these are useless though it can be used as a treatment for lice since it contains resin that irritates lice.
Every summer, some people especially teenagers, experience having lice on their head. These pests live on their head and gives itchy feeling that can irritate the person. Having lice is a problem experienced by the children, teenagers and sometimes, even adults.
How will the
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The external bark is brown-colored, more or less smooth; the internal one is pink colored and insipid.
Fruits are syncarpic (constituted by concrescence of carpels and receptacle), ovoid, ovoid-ellipsoid, or oblong-ovoid, 15 cm to 20 cm long and even 30 cm, 10 cm to 15 cm wide, fleshy, dark-green, with flexible and curve aculea on the surface. The pulp is white, cotton-like, juicy, and bitter.
Numerous seeds (from 30 to 200) are present in each fruit, although only one is present in each carpel. Seeds are 1.25 cm to 2 cm long, oval or oblovoid, flattened, black, and smooth. Seed cover is dark and bright.
Frequently, these fruits reach up to 4 kg in weight or more. There exist some varieties that have no seeds, although they tend to be fibrous.

Guyabano Fruit
Guyabano are good in checking insect pests. Pulverizing the guyabano seeds and mixing it with soap and water can be used as an effective spray against caterpillars, armyworms and leafhoppers on plants. The petroleum ether and chloroform extracts of guyabano are toxic to black carpet beetle larvae. The seed oil kills head lice. (Source:

Chemical constituents
The extract also yielded a dark-green resin containing: myricyl alcohol, sitosterol, fatty acids

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