lavor condition when
applied too close to harvest. Lindane is less likely to cause off-flavor
in fruit than technical benzene hexachloride but may not overcome this
fault altogether.

The organic phosphate insecticides, like DDT, were first found of value
in Europe and were introduced into the United States after the close of
World War II. Parathion in particular shows great promise for the
control of many insect pests. Although these compounds are very
poisonous and must be handled strictly in accordance with the
manufacturers' recommendations, a recent announcement by Arnold J.
Lehman, of the Food and Drug Administration, indicates that their
residues are not likely to be harmful. He has stated that "parathion is
not stored in the tissues to an appreciable extent--it is rapidly
destroyed by the tissues of the body which in turn is an added mechanism
for the prevention of tissue accumulation." Residues of hexaethyl
tetraphosphate and tetraethyl pyrophosphate persist for only a short
time and residues of parathion drop to a low level within 10 to 14 days
after application. This information, however, does not make it
unnecessary for the user to observe strictly all warnings and
precautions issued by the manufacturers of parathion and of other
organic phosphates. Serious effects and deaths have occurred though
excessive exposures to parathion.

General Information Regarding the Use of the New Organic Insecticides

~Handling the insecticides.~ All the new organic insecticides, the organic
phosphates in particular, are to some degree toxic not only to many
insects but to man and animals as well. Even the most toxic ones can be
used, however, without harmful effects on the operator, provided all the
cautions issued by the manufacturer are properly followed. Special care
must be taken in handling concentrated insecticides preparatory to
making diluted spray or dust applications.

~Spray concentrations.~ DDT has been used more extensively than any of the
other newer insecticides and for this reason there is considerable
information relative to the spray concentrations known to be effective
against insects susceptible to it. For spray purposes DDT is generally
employed at the rate of 1-1/2 to 4 pounds of 50 percent wettable powder
per 100 gallons of water.

Parathion is being used at 1/2 to 1-1/2 pounds of 15 percent wettable
powder per 100 gallons of water for mites and up to 2 pounds to 100
gallons of water for insect