Multi-Resistant Aedes aegypti in Puerto Rico and Virgin Islands

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Science  03 Mar 1961:
Vol. 133, Issue 3453, pp. 646-647
DOI: 10.1126/science.133.3453.646


The Isla Verde, Puerto Rico, laboratory colony, highly resistant to DDT and dieldrin in 1959, became even more so by 1960; resistance to organic phosphates was also greater than before. In laboratory tests Bayer 29493 was best for killing resistant larvae and adults. It is improved with piperonyl butoxide at the ratio of 10:1.