摘要：In order that the WHO standard test for mosquitos may yield a median lethal dose value (LC50) in the case of highly tolerant species and resistant strains, it is necessary to increase the exposure period. The experiments described in this paper, done with a DDT-tolerant strain of Culex pipiens fatigans, show that doubling the exposure period has the same effect as doubling the DDT concentration, since it doubles the uptake of DDT into the mosquitos, and has the result of halving the LC50 obtained. Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (714K), or click on a page image below to browse page by page. Links to PubMed are also available for Selected References . 561 562 563 564 565 566 567
