About 100 years ago, it was dicovered that insects transmit
grave, mainly tropical diseases - very much to the
astonishment of the physicians of that time, who saw this as
a new, possibly easy, way of eradicating the diseases by
exterminating the vectors. For some years, DDT and other
then new insecticides achieved great improvements, but
subsequently serious setbacks emerged:
insecticide-resistance and anxiety about toxicity to man and
animals. In the past twenty years, serious efforts have been
made tofind alternatives, with varying degrees of success.
grave, mainly tropical diseases - very much to the
astonishment of the physicians of that time, who saw this as
a new, possibly easy, way of eradicating the diseases by
exterminating the vectors. For some years, DDT and other
then new insecticides achieved great improvements, but
subsequently serious setbacks emerged:
insecticide-resistance and anxiety about toxicity to man and
animals. In the past twenty years, serious efforts have been
made tofind alternatives, with varying degrees of success.
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