Abstract
RECENTLY it has been noticed during field trials in mosquito control that there is an apparent correlation between relative humidity and the insecticidal effectiveness of deposits in houses made of mud walls and thatched roofs. Bordas and Navarro1 in Mexico found a steady increase in toxicity of dieldrin deposits as the relative humidity increased throughout the season. Burnett2 in Taveta, Kenya, found that seasonal variations in rainfall, presumably accompanied by variations in humidity, were associated with corresponding changes in the mortalities of mosquitoes exposed to dieldrin deposits.
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References
Bordas, E., and Navarro, L., WHO (Malaria), 125 (Geneva, 1955).
Burnett, G., Nature, 177, 663 (1956).
Hadaway, A. B., and Barlow, F., Bull. Ent. Res., 43, 281 (1952).
Barlow, F., and Hadaway, A. B., Bull. Ent. Res., 46, 547 (1955).
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BARLOW, F., HADAWAY, A. Effect of Changes in Humidity on the Toxicity and Distribution of Insecticides sorbed by some Dried Soils. Nature 178, 1299–1300 (1956). https://doi.org/10.1038/1781299a0
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DOI: https://doi.org/10.1038/1781299a0
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