Residual-Insecticide Field Trials in Haiti

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  • Biology/Chemistry Section, Technology Branch, Communicable Disease Center, Public Health Service, U. S. Department of Health, Education, and Welfare, Savannah, Georgia

Summary and Conclusions

The comparative effect of DDT, carbaryl, Banol, Mobam, SD-8530, and folithion on the behavior and survival of A. albimanus was studied in experimental huts in Haiti.

The average mortality in naturally entering A. albimanus at 5 to 9 weeks was generally low with all treatments. At 14 to 19 weeks the average mortality of released A. albimanus was approximately 50 percent in all of the treated huts. Mosquitoes in these observations were exposed for 12 hours. Exposure of the mosquitoes under plastic cones rated all materials effective for 19 weeks at the 90 percent level against both sugarfed and blood-fed A. albimanus.

The treatments of the different compounds did not affect the relative indoor resting heights of A. albimanus. It was not possible to characterize changes in behavior patterns of this mosquito due to their low density at the time of this study. It did appear, however, that some of the materials may have had either a deterrent or a repellent effect, or both.