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Observations on mosquito breeding in wells and its control.

Studies on mosquito breeding in wells revealed the dominance of An. stephensi among the malaria vectors, whereas Cx. quinquefasciatus was most abundant in disused wells and was present in wells of all depths. None of the anopheline species was encountered when well depth up to water level exceeded 12 m. Larval breeding was effectively controlled through the introduction of larvivorous fish Poecilia reticulata and expanded polystyrene (EPS) beads in comparison to untreated control wells.