HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Peters, E. J. Articles by Lowance, S. A. Search for Related Content PubMed Articles by Peters, E. J. Articles by Lowance, S. A. Agricola Articles by Peters, E. J. Articles by Lowance, S. A.

Herbicides for Control of Ragweeds in Korean Lespedeza¹

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.

Key Words: Ambrosia artemisiifolia • A. bindentata • 2,4-D • 2,4-DB • Bromoxynil • Chloroxynil • Forage • Seed • Germination

² 2 Research Agronomist and Agronomist (Research Assistant), Crops Research Division, ARS, USDA, Columbia, Mo. 65201.

Received for publication October 24, 1969.