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80-
70-
60-
MILLIONS OF POUNDS
50 -
40-
30-
ALDRIN -TOXAPHENE GROUP
DDT
20-
10-
BHC
LEAD
ARSENATE
CALC.
ARS.
PARATHION a
METHYL PARATHION
FIGURE 2
compounds are more rapidly degraded although, under certain circum-
stances, they have persisted from one growing season to the next following
routine application. Pyrethrum, rotenone, and nicotine are destroyed
relatively rapidly after application, but compounds incorporating copper,
lead, and arsenic are persistent.
The distribution and persistence of other chlorinated hydrocarbons have
been studied in less detail, although some of these chemicals have been
widely applied. One of these, dieldrin, resembles DDT in stability, per-
sistence, and in solubility. Recently, it has been found in the fat of residents
of southern England. It has also been found in many wild birds, fish, and
mammals in the United States. These facts led the Panel to anticipate that
surveys will discover dieldrin and other persistent chlorinated hydrocarbons
in man and wildlife throughout most of the United States.
Source: https://www.industrydocuments.ucsf.edu/docs/ixbb0228

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