SOME possible causes of complaints on the decline in effectiveness of DDT residual spraying in 1947.
D000818:Animals; D003634:DDT / Q000494:pharmacology*; D006801:Humans; D006843:Hydrocarbons, Chlorinated; D007300:Insect Control; D007313:Insecta
D006843:Hydrocarbons, Chlorinated; D003634:DDT
INSECTS/eradication; diCHLOROdiPHENYLtriCHLOROETHANE/effects