Premium
Chemical and Cultural Methods for Downy Brome Control and Yield of Winter Wheat 1
Author(s) -
Swan D. G.,
Oveson M. M.,
Appleby A. P.
Publication year - 1974
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/agronj1974.00021962006600060022x
Subject(s) - bromus tectorum , mulch , agronomy , tillage , atrazine , weed control , environmental science , weed , biology , pesticide , perennial plant
Downy brome ( Bromus tectorum L.) is difficult to control with stubble mulch fallow. Herbicides effectively control this weeds so combinations of herbicides and stubble mulch fallowing were evaluated. Winter wheat ( Triticum aestivum L.) yields from chemical, stubble mulch, and chemical plus stubble mulch fallow systems were obtained from 1960 to 1966 at nitrogen levels of 45, 90, and 134 kg/ha. In the summer fallow year, vegetation was controlled in the chemical plots with a winter treatment of atrazine [(2‐chloro ‐4‐(ethylamino‐)‐6‐(isopropylamino)‐s‐triazine] plus amitrole (3‐amino‐s‐triazole), and the use 2,4‐D [(2,4‐dichlorophenoxy)acetic acid] in the summer. Wheat was seeded directly into nontilled soil. Conventional stubble‐mulch tillage was used for tilled plots. Tillage was initiated in early June in the chemical + stubble mulch plots. Effect of nitrogen rate and fallowing method on wheat yield was inconsistent over the study period. Chemical + stubble mulch fallow was the most consistent treatment. Yields from this treatment were significantly higher than from chemical alone 3 of the 5 years, indicating that tillage often is beneficial in this soil type even when weeds are not a factor.