Methanolic extracts of the leaves of
Atlantia monophylla
(Rutaceae) were evaluated for mosquitocidal activity against immature stages of three mosquito species,
Culex quinquefasciatus
,
Anopheles stephensi
, and
Aedes aegypti
in the laboratory. Larvae of
Cx. quinquefasciatus and pupae of
An. stephensi were found more susceptible, with LC
50 values of 0.14 mg/l and 0.05 mg/l, respectively. Insect growth regulating activity of this extract was more pronounced against
Ae. aegypti, with EI
50 value 0.002 mg/l. The extract was found safe to aquatic mosquito predators
Gambusia affinis
,
Poecilia reticulata
, and
Diplonychus indicus
, with the respective LC
50 values of 23.4, 21.3, and 5.7 mg/l. The results indicate that the mosquitocidal effects of the extract of this plant were comparable to neem extract and certain synthetic chemical larvicides like fenthion, methoprene, etc.
