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Herbicides for Control of Ragweeds in Korean Lespedeza 1
Author(s) -
Peters E. J.,
Lowance S. A.
Publication year - 1970
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1970.00021962006200030027x
Subject(s) - lespedeza , agronomy , germination , weed control , bromoxynil , ambrosia artemisiifolia , ragweed , chemistry , biology , allergy , immunology
We evaluated (2,4‐dichlorophenoxy)acetic acid (2,4‐D); 4‐(2,4‐dichlorophenoxy)butyric acid (2,4‐DB); 3,5‐dibromo 4‐hydroxybenzonitrile (bromoxynil); and 3,5‐dichloro‐4‐hydroxybenzonitrile (chloroxynil) for control of common ragweed ( Ambrosia artemisiifolia L.) and lanceleaf ragweed ( Ambrosia bidentata Michx.). Effects of the herbicides on yields of lespedeza ( Lespedeza stipulacea Maxim.) forage, and yields and germination of lespedeza seed were also evaluated. The ester of 2,4‐D controlled ragweed, but seriously injured lespedeza. The ester of 2,4‐DB was not as effective as 2,4‐D on ragweed, but resultant yields of lespedeza were greater. Injury to lespedeza from .56 kg/ha 2,4‐D amine, when applied early, was offset by increased yields resulting from excellent weed control. Bromoxynil and chloroxynil at .56 kg/ha controlled ragweeds effectively and injured lespedeza less than 2,4‐D) and 2,4‐DB.