Chemical Defoliation of Pin Oak in the Expanding Leaf Stage1

Authors:
J. P. Sterrett Agricultural Research Service, U.S. Department of Agriculture, Frederick, MD 21701

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R. A. Creager Agricultural Research Service, U.S. Department of Agriculture, Frederick, MD 21701

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J. P. Sterrett Agricultural Research Service, U.S. Department of Agriculture, Frederick, MD 21701

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R. A. Creager Agricultural Research Service, U.S. Department of Agriculture, Frederick, MD 21701

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Contributor Notes

Received for publication July 27, 1977.

Plant Physiologist and Horticulturist, Weed Physiology and Growth Regulator Research Laboratory. The authors thank Dr. C. L. Graham, Entomologist, ARS, Plant Disease Research Laboratory, Frederick, MD for his assistance with insect defoliators. We also thank the Pennwalt Corporation for the endothall acid, Amchem Products, Inc. for the ethephon (Amchem 68-240), and ICI America, Inc., Atlas Chemicals Division, for the AL-1161.

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