The effects of common salt on Aedes togoi and filarial infection

The effects of salt on the development of Aedes togoi and the infecton of Brugia pahangi were studied. Salt concentrations over 7.2% completely got rid of pupae and adults. The salt concentrations 0% to 3.6% reduced pupal development from 86.6% to 72.8% and adult from 70.3% to 53.3%. B. pahangi infestations and infection rates were also reduced in the mosquitoes reared at salt concentrations of 1.8% and 3.6%. Trends of retardation in the filarial development were observed when the salt concentrations were increased.

Interactions between larvae of Aedes aegypti and Aedes albopictus in mixed experimental populations.

The interaction between larvae of Ae. aegypti and Ae. albopictus in mixed experimental populations under adequate and inadequate food supply were studied in the laboratory. The results revealed that Ae. aegypti had the beneficial effects on the development and survival of Ae. albopictus when food was adequate but adverse effects on Ae. albopictus is exterminated when Ae. aegypti is present. Urbanization and ecology of mosquitoes could be factors in the decreasing number of Ae. albopictus population in urbanized areas. Further experiments are necessary to study the interaction of mosquitoes under various conditions.