A DDT study that isn’t 50 years old:
Susceptibility levels for the adult bed-bug, Cimex lectularius, in Belo Horizonte, Minas Gerais – Brazil, to DDT, were determined during the period 1985 to 1986. The test results showed that a 4% dosage of DDT is not enough to kill 55% of the insects. The data are sufficient to show that there exists bed-bug resistance to DDT in Belo Horizonte.
NAGEM, Ronaldo L. and WILLIAMS, Paul. Susceptibility tests of the bed-bug Cimex lectularius L. (Hemiptera, Cimicidae) to DDT in Belo Horizonte, MG (Brazil). Rev. Saúde Pública [online]. 1992, vol.26, n.2 [cited 2009-05-07], pp. 125-128. ISSN 0034-8910. doi: 10.1590/S0034-89101992000200009
I’m glad I found this because the Brazilian online scientific library, SciELO, is pretty neat.
There is also this review from 1990 that clarified some questions for me and led to some other interesting paths:
FORATTINI, Oswaldo Paulo. The Cimicidae and their importance in Public Health (Hemiptera-Heteroptera; Cimicidae). Rev. Saúde Pública [online]. 1990, vol.24, suppl., pp. 1-37. ISSN 0034-8910. doi: 10.1590/S0034-89101990000700001.
It’s in Portuguese but there’s a handy automatic translation that is serviceable (I hope).
These pages may be of related interest:
