EFFECT OF SOIL INCORPORATED HERBICIDES ON WEEDS AND YIELD OF CANOLA (BRASSICA NAPUS L.)

The effect of two soil incorporated herbicides viz., trifluralin @ 0.90,1.20,1.50 kg a.i. ha(-1) and acetochlor @ 0.094, 0.124 and 0.312 kg a.i. ha-1 on weeds and yield of canola was evaluated in a field trial at Agronomic Research Area, University of Agriculture, Faisalabad. Trifluralin @ 1.50 kg a.i. ha-1 was very effective in controlling the weeds and reducing their fresh and dry weight. Application of trifluralin @ 1.5 kg a.i. ha-1 reduced the weed density (7.00 m(-2)) significantly as compared to control (32.67m(-2)) reducing the weed dry weight from 8.1 gm(-2) to 1.7 gm(-2). Trifluralin @ 1.5 kg a.i. ha(-1) showed maximum increase (34%) in canola seed yield by increasing the number of pods per plant, seeds per pod and 1000-seed weight.