Physicochemical factors affecting the breeding of Anopheles minimus var. flavirostris

ABSTRACT

A selected number of physicochemical factors were studied to determine their effect upon the breeding of A. minimus var. flovirostris, the chief vector of malaria in the Philippines. To this end, a comparison was made between one portion of a stream found to be constantly positive for A. minimus and another portion of the same stream consistently negative for the larvae of this mosquito. Comparisons were also made between two positive and two negative wells. The results of a total of 233 observations indicate the preference of A. minimus for water of high purity with high oxygen but low carbon dioxide contents. (Summary and conclusions)