Pre- and post-emergence herbicides for irrigated wheat in Ethiopia
1999
Kassahun Zewdie | Tanner, D.G.
Various combinations and rates of two pre- and four post-emergence herbicides and three hand weeding treatments were evaluated for the control of weeds and effects on the grain yield of the bread wheat variety Bluejay during the 1989-1991 cool seasons under irrigation at the Melka Werer Research Center in the Awash Valley of Ethiopia. The results indicate that the pendimethalin plus bromoxynil plus MCPA combination was almost as effective in controlling the major grass (Sorghum arundinaceum and Echinochloa colona) and broadleaf weeds (Zelya pentandra, Portulaca oleraceae and Corchurus olitorius) as twice hand weeding. Hence, depending on the severity of weed infestation, a combination of these three chemicals at the active ingredient rates of 1.44 + 0.24 + 0.24 9 ha-l, respectively, was found to be the most effective in controlling both grass and broadleaf weeds and resulted in a significant increase in grain yield
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