About 4,500 guppy fishes to be introduced into wells, sumps in houses at Poondhottam
It is a method of biological control of mosquitoes
It neither affects environment nor harms non-target organisms
VELLORE: About 4,500 guppy fishes were distributed in sachets free of cost to 321 residents of Poondhottam area here on Friday, as part of a malaria prevention campaign launched by the Zonal Entomolo