Competition and weedicide studies of Mintweed (Salvia reflexa Hornem).

Abstract

Experiments to determine the value of selective herbicides and improved soil fertility for the control of mintweed in competition with crop and pasture species are described. Under glass-house conditions mintweed and Queensland blue grass gave a lesser response to added sulphate of ammonia than did Rhodes grass; the contrast was more marked where water supply was limited. Rhodes grass competed more strongly with mintweed than did Queensland blue grass. Where mintweed was controlled by a selective herbicide the yield of sorghum and French millet was increased significantly.