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Response and Analysis of Wheat Following Late Preharvest Applications of 2,4-D

Published online by Cambridge University Press:  12 June 2017

W. M. Phillips ,
G. Yip ,
K. F. Finney ,
J. L. Hilton  and
W. C. Shaw
W. M. Phillips
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Hays, Kansas
G. Yip
Affiliation:
Division of Food Chemistry, Food and Drug Administration, U. S. Department of Health, Education, and Welfare, Washington, D. C.
K. F. Finney
Affiliation:
Hard Winter Wheat Quality Laboratory, Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Kansas State University, Manhattan, Kansas
J. L. Hilton
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Beltsville, Maryland
W. C. Shaw
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Beltsville, Maryland Crops Protection Research Branch, CR, ARS, USDA, Beltsville, Maryland
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Abstract

The dimethylamine salt and isopropyl and isooctyl ester formulations of 2,4-dichlorophenoxyacetic acid (2,4-D) were applied at 0, ½, 1, 2, and 4 lb/A 21, 14, and 7 days before harvesting Bison hard red winter wheat. Treatment effects on yield, chemical composition, or milling and baking properties of the grain were either nil or of no practical significance. When treated with ½ or 1 lb/A, rates generally recommended for farm use, 2,4-D residues in the grain ranged from 0.04 to 0.27 ppm. As rates of the three formulations of 2,4-D were increased from ½ to 4 lb/A, increasing amounts of 2,4-D residues occurred in the grain and reached a maximum of 1.8 ppm when the isopropyl ester of 2,4-D was applied at 4 lb/A 14 days before harvest. Grain from plots treated 21 days before harvest had less 2,4-D residue than grain from plots treated 14 and 7 days before harvest.

Type
Research Article
Information
Weeds , Volume 15 , Issue 2 , April 1967 , pp. 107 - 111
Copyright
Copyright © 1967 Weed Science Society of America 

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References

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