Efficacy of pre-emergence herbicides in Nagpur mandarin

摘要

Studies were conducted on 10 year old trees of Nagpur Mandarin budded on Rough lemon (Citrus jambhiri Lush) planted at a distance of 6m x 6m in black clay soil of Nagpur. All the treatments significantly reduced weed population per unit area over handweeding and control. Maximum weed control efficacy (96.86%) for 300 days was observed with diuron (3 kg a.i./ha) when sprayed twice at an interval of 120 days. It was followed by simazine (96.06%) at the rate of 4 kg a.i./ha and trifluralin (2.0 1 a.i./ha). Trifluralin was less effective to dicot weeds, Bermuda and nut-sedge grass.