Influence of 2,4‐D and surfactant in combination with urea herbicides on the control of weeds in wheat

Abstract

Abstract The influence of isoproturon (1.0 kg/ha), metoxuron (1.6 kg/ha) and methabenzthiazuron (1.4 kg/ha) mixed with 2,4‐D (0.50 kg/ha) each at their 50% less dose and with surfactant (0.1 %) at their 25% less dose demonstrated that per cent control of wild oat and wild canary grass reduced when these herbicides were combined with 2,4‐D. Addition of surfactant improved the control of wild oat, wild pea, yellow sweet clover and commonvetch. Combination of urea herbicides and 2,4‐D increased the control of broad leaf weeds over urea herbicides applied alone. However, the control of broad leaf weeds was almost similar to 2,4‐D applied alone. Pre‐emergence application of urea herbicides was less effective than their post‐emergence applications. Reduced rate of isoproturon and metoxuron in combination with surfactant gave similar grain yield to that obtained at recommended doses of these herbicides applied alone.