Responses of Anopheles culicifacies sibling species A and B to DDT and HCH in India: implications in malaria control.
Differential responses of Anopheles culicifacies Giles sibling species A and B to DDT were evident from higher survival rate of species B in laboratory bioassays and greater proportions of species B in DDT-sprayed villages of northern India, compared with those under HCH pressure. Both species A and B have become almost completely resistant to HCH in this area due to regular house-spraying with HCH for about the last 10 years. Because species A predominates in northern India, where it has been incriminated as an important vector of malaria, and species A is more susceptible than species B to DDT, it is suggested that DDT would control malaria transmission more effectively than HCH in this situation. Monitoring of insecticide resistance in species A is therefore recommended as the basis for future choice of insecticides to be used by the National Malaria Eradication Programme.
Subbarao
S K
SK
Malaria Research Centre, Indian Council of Medical Research, Delhi.
Vasantha
K
K
Sharma
V P
VP
D000336:Aerosols; D000818:Animals; D000852:Anopheles; D003634:DDT; D005260:Female; D001556:Hexachlorocyclohexane; D007194:India; D007305:Insecticide Resistance; D008288:Malaria / Q000517:prevention & control*
D000336:Aerosols; D001556:Hexachlorocyclohexane; D003634:DDT