| According to WHO globally dengue disease is 10th | | | | Even if temephos seems to be more |
| most common cause of mortality | | | | effective,leaves extracts are bio degradable, |
| Two-third of the world population is at risk of | | | | environmentally safe and non toxic to humans as |
| contracting dengue fever. There are 50 -100 million | | | | compared to synthetic insecticides such as |
| cases of dengue fever each year. Dengue fever (DF) | | | | Temephos or DDT.This study will help to provide |
| and dengue hemorrhagic fever (DHF) are caused by | | | | basis for developing more effective prevention |
| dengue viruses (genus Flavivirus; family Flaviviridae). | | | | strategy including bio environmental factors |
| Dengue viruses are small, single-stranded, RNA | | | | responsible for mosquito breeding & new |
| viruses. There are four antigenically-related but | | | | mosquito control measures. |
| distinct serotypes, dengue 1, dengue 2, dengue 3 and | | | | Research papers highlighting this problem and possible |
| dengue. This virus enters the human body through | | | | solutions were presented in National conferences on |
| the bite of Aedes mosquito that carry one of the | | | | medical microbiology and biotechnology: IAMM, 2004, |
| four strains of dengue virus. | | | | Mumbai and Anna university Biotechexcellence 2005, |
| There are basically two strategies employed: | | | | Chennai, respectively. As far as culicidae family is |
| 1. Study of vector population | | | | concerned knowledge of developmental biology is |
| 2. Evaluation of possible larvicidal activity of some | | | | limited. Therefore it is necessary to study and try to |
| selected plant extracts | | | | modify the mosquito development in a such a way |
| On the ground of above strategies and experiments | | | | that mosquitoes will be recognized as friends of |
| we concluded that A. Squamosa and A. Indica are | | | | human kind and not nuisance. |
| Good inhibitors of mosquito (Aedes aegypti) breeding. | | | | |