Integration of reduced dose rates of fluazifop-butyl or sethoxydim with hand-hoe weeding for the control of Digitaria abyssinica and other weed species.

Field experiments were conducted in 1995/96 cotton season at Namulonge and Bukalasa in Uganda. The study was conducted to evaluate the efficacy of red uced dose rates of the grass selective herbicides fluazifop-butyl and setho xydim on D. abyssinica and other grass weed species. Treatments used were; fluazifop-butyl applied at 137.5, 162.5 and 187.5g a.i/ha sethoxydim at 405 .3, 501.8 and 579g a.i/ha integrated with 2 hand-hoe weedings, hand-hoe wee ding alone and control. These herbicides similarly gave good grass weed con trol while the broad leaf weeds were suppressed by the hand-hoe weedings. O verall grass weed reductions of 78-93% were obtained after the application of herbicides. Detailed data will be reported on percentage weed control of the grasses, and fresh weight of D. abyssinica.