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Shell By ]. VAN OVERBEEK Oil Company, Agricultural Laboratory, Modesto, California ECONOMIC ASPECTS Eight years ago when the writer prepared a review on auxins for the Annual Review of Biochemistry (173), there were sufficient practical applica tions for these compounds to warrant inclusion of a section on Practical Aspects. At that time the prevention of preharvest drop of apples by naph thaleneacetic acid was the most significant use from an economic point of view. Supplementing pollination for fruit set in tomatoes, preventing sprouting of potatoes in storage, and inducing root formation on cuttings were three other effects of auxins which had come into use in the early forties. Today, these older uses have been expanded and newer ones have been found. The use of the synthetic auxin, 2,4-dichlorophenoxyacetic acid (2,4-D) , has been so widely accepted that it has become a major agricultural chemical. It is being produced in this country in quantiti�s of 28 million pounds annually (4,170) , a figure approaching that of the insecticides 1,1, I-trichloro-2,2-bi� (p-chlorophenyl) (D DT) and benzenehexachloride. Weed control is the principal use for 2,4-D in the United Stated as well as elsewhere. Thus in Canada, which is reported (4) to
Annual Review of Plant Biology – Annual Reviews
Published: Jun 1, 1952
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