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Winter Wheat Response to Herbicides Applied Postemergence 1
Author(s) -
Robison L. R.,
Fenster C. R.
Publication year - 1973
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/agronj1973.00021962006500050022x
Subject(s) - dicamba , cultivar , seedling , agronomy , clopyralid , winter wheat , weed control , weed , biology , bentazon
Previous research has indicated that herbicides will cause injury to wheat when applied at certain stages of growth. With the development of new herbicides and a complete change in wheat cultivars, work was initiated to determine the cultivar‐herbicide interaction. Twelve different herbicide treatments were applied to five different cultivars of winter wheat ( Triticum aestivum L.) at four stages of growth for 3 years at two locations. All plots were kept weed‐free. The stages of wheat growth were fall seedling, spring tillering, boot, and heading. Wheat was most susceptible to injury when herbicides were applied in the boot stage. Wheat also showed considerable injury when herbicides were applied immediately following heading. Herbicide applications in the fall to the seedling stage did not cause as much injury as was expected on the basis of published research. Combinations of herbicides reduced injury below that of the commonly used higher rate of single herbicides. The higher rates of both the ester and amine forms of (2,4‐dichlorophenoxy) acetic acid (2,4‐D) and 3,6‐dichloro.o.anisic acid (dicamba) caused the most injury to all cultivars of wheat.