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Abstract
Field trials were conducted at Kadawa in the 1983/4 and 1984/5 dry seasons to evaluate some herbicide treatments for weed control in transplanted irrigated sweet pepper (Capsicum annuum L., var. California mild). In the 1983/4 dry season, mixtures of metolachlor with metribuzin at 1.5 + 0.25 and pendimethalin plus linuron at 1.5 + 0.75 kg a.i./ha, each followed by supplementary hoe‐weeded control. Without supplementary hoe‐weeding, mixtures of linuron with oxadiazon and alachlor each at 0.75 + 1.5 kg a.i./ha and metolachlor plus metobromuron at 1.25 + 1.25 kg a.i./ha resulted in yields comparable to the hoe‐weeded control. In the 1984/5 dry season, linuron at 0.75 kg a.i./ha in mixture with either diphenamid, metolachlor, oxadiazon or chlorthal dimethyl ester at 3.0,1.5,1.5 and 10.0 kg a.i./ha, respectively, as well as metolachlor plus metobromuron at 1.5 + 1.5 kg a.i./ha, all supplemented with one hoe‐weeding, combined effective weed control with high pepper fruit yield comparable to the hoe‐weeded control. In this study unchecked weed growth throughout the crop life cycle resulted in 90% and 97% losses in sweet pepper fruit yield compared with the approximate maximum obtained in the 1983/4 and 1984/5 dry seasons, respectively.