L1 /
4
CH3041
DDT II
• In 1954 the problems of persistence &
biomagnification of the chemical became
apparent.
biomagnification of the chemical became
apparent.
• Rachel Carson’s Silent
Spring (1962) focussed attention on the build-up of DDT
in the environment which had decimated the
nos of American robins (DDT + earthworms)
in the environment which had decimated the
nos of American robins (DDT + earthworms)
• In 1969 DDT was banned for use
in Sweden, USA in 1973,
Australia in 1987.
• Australian use was heavy in cotton and tobacco : 1969 3500
tons/y 1979 200 tons/y
