The Biobrio 10(1 & 2), 2023

Studies on Anopheles stephensi Var. mysorensis- choice of water and effect of pH on oviposition

Mithilesh Kumar

ABSTRACT:

Two experiments were designed to study the preference of different types of water for oviposition by Anopheles stephensi Var mysorensis in the laboratory. Nine types of water (pH range 6.0 to 7.0) viz; Pond water, Well water, Tube well water, Municipal tap water, Distilled water containing 1.0 per cent glucose, Distilled water containing 1.0 per cent glucose and 1.0 per cent yeast, Distilled water containing 1.0 per cent yeast, saline water and Drain water were provided to the blood fed mosquitoes. Anopheles stephensi Var mysorensis females did not prefer highly acidic (pH 2.0 to 5.0) or sufficiently alkaline medium (pH 9.0 and above) for oviposition. Anopheles stephensi Var mysorensis invariably preferred waters having pH value 6.0 and 7.0.

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