I found this that is available from any chemist ,
Pyrethrum (Pyrethrin)
Pyrethrin insecticide, pyrethrin spray, pyrethrin fogging products, pyrethrin foggers.
Enviornment-Safe Pyrethrum
Pyrethrum is a completely organic, environment-safe insecticide derived from 100% African Chrysanthemum flowers. Pyrethrum powder is toxic to ants, roaches, silverfish, bed bugs, fleas, wasps, spiders, crickets, mosquitoes, and just about every other category of unwanted house or garden pest. Because it decomposes rapidly in the environment, pyrethrum has been approved for a wide range of indoor and outdoor uses, including homes, restaurants, broad-scale spraying operations, and organic farms.
In addition to being environment friendly, pyrethrum also has the following unique properties:
Quick Action - Pyrethrum poisons insects upon contact, attacking the central nervous system and resulting in faster knockdown and kill.
Low Toxicity - Pyrethrum is one of the least toxic insecticides available, boasting a long history of proven safety towards humans and animals.
Repellent - When not present in fatal amounts, pyrethrum acts as a repellent to protect food establishments, grain storage, and crops from insect pests.
Flushing Agent- Pyrethrum agitates insects in their hiding places, flushing them out and forcing them to be exposed to the insecticide.
Multi-purpose - Pyrethrum consists of a group of compounds rather than a single compound, resulting in a wider scope of activity against pests than other insecticides. It can be used against almost any pest in the house or garden.
No Insect Immunity - Insect resistance is not a problem because of the complexity of the molecule that pyrethrum is composed of.