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Mass Destruction of Adult Anophelines by DDT as a Suggested Malaria Control Measure¹

A Preliminary Report

All adult anopheline resting places in a sixteen square mile area were sprayed with a five per cent emulsion of DDT in July and August of 1946 for the purpose of evaluating the effect on the gross anopheline populations.

The subsequent reduction in anophelines seems to warrant further consideration of this means of malaria control. Following treatment, only one anopheline could be found within the sprayed shelters. Larval populations, by comparison with untreated areas, were reduced 89.1 per cent. Other areas under study during the period of the experiment showed no tendency towards a concomitant natural reduction in anopheline populations.

¹ Presented at the annual meeting of the Association of Southeastern Biologists, Atlanta, Georgia, April 19, 1947.

² Georgia Department of Public Health, P. O. Box 211, Cordele, Georgia.