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 Brown, A. R. Articles by Beaty, E. R. Search for Related Content PubMed Articles by Brown, A. R. Articles by Beaty, E. R. Agricola Articles by Brown, A. R. Articles by Beaty, E. R.

Effect of Triazine Herbicides on the Prussic Acid Content and Forage Yield of Sorghums¹

Prometryne and atrazine were applied preemergence at 2.24 and 4.48 kg/ha on five hybrid forage sorghums in 1965. Propazine preemergence and atrazine postemergence were applied at the same rates in 1966 and 1967. Forage was harvested in the boot stage simulating green chop. A lO-cm stubble was left to facilitate regrowth. Prussic acid was determined qualitatively by the A.O.A.C. Na-picrate paper method. The use of prometryne, atrazine, and propazine as herbicides for weed control in forage sorghums did not increase the prussic acid content of the forage. The 2.24- and 4.48- kg/ha rates of prometryne and atrazine applied preemergence depressed forage yields in 1965. The 2.24- and 4.48-kg/ha rates of atrazine postemergence and propazine postemergence did not reduce forage yields of any forage sorghums in 1966 and 1967 except ‘Dekalb SX-11’ which was drastically reduced by the higher rate of atrazine.

Key Words: Prometryne • Atrazine • Propazine • Hydrocyanic acid • Chemical weed control • Green chop

² Associate Agronomist and Agronomist, College Experiment Station.

Received for publication July 12, 1969.