Investigated were conducted in Uganda on the effect of glyphosate dose rate, timing of application, and the combination of glyphosate with cultural methods for the control of
Digitaria abyssinica
(A.Rich) Stapf. Results showed a dose rate of 1.5 kg a.e.ha
-1 to be optimum. Application with pre-plant tillage did not increase
D. abyssinica control, but increased populations of other weeds and costs. Glyphosate efficacy was increased when preceded by slashing, burning or digging. At least one month was required between the cultural pre-treatments and spraying to allow new shoots to emerge. Glyphosate was most effective when applied to
D. abyssinica shoots up to eight weeks after emergence. The optimum timing for spraying was between one and two month after cultural pre-treatment. Glyphosate applications considerably reduced labour requirement for preparation of
D. abyssinica infested land.
