Use herbicides for pre-emergence weed control in wheat

摘要

Two herbicide groups - pendimethalin and trifluralin can be effectively used in wheat at sowing stage to control gulli danda and other broad leaf weeds. Gulli dandalsitti has emerged as a dominant weed of wheat crop in Northern India especially afterit gained resistance to isoproturon during early 1990's. Isoproturon was recommended for the control of grasses in wheat during 1977. It was adopted very quickly due to ease of application and cost effectiveness with excellent control of gulli danda. Efficacy of isoproturon started to decrease from 1992. Alternate herbicides viz. Puma Super (fenoxaprop) 400 ml/ac, Topik (clodinafop) 160 g/ac and Leader (sulfosulfuron ) @ 13.5 g/ac were recommended for its control during 1998-99. These three herbicides were accepted very readily in spite of being very costly as these herbicides gave very effective control of gulli danda and wheat productivity was substantially increased.