Malaria control measure

b) DDT / Dichloro- Diphenyl

-Trichlorethane:

• Chlorinated hydrocarbon discovered in 1874 by German scientist Ziedler
• It is a crystalline coarse white powder with a pleasant apple like smell
• It is a neurotoxic /nerve poison affecting the nervous system and has residual effect of up to 8 to 10 weeks
• It is not harmful to humans if carefully handled

Natural methods of controlling

Mosquitoes:

Chemical methods –

• These methods are done to prevent breeding of mosquitoes and are done by altering the pH of the water by addition of organic substances
• Fouling clean water by polluting it will sewage and industrial waste water
• Increasing the salinity of water by adding sea water into fresh water

Physical methods –

• Removing aquatic vegetation and allowing free water flow
• Use of herbal plants which will eliminate breeding of mosquitoes
• Using intermittent irrigation, so that water logging is prevented