Effect of Pendimethalin, Trifluralin and Terbutryn on Lolium multiflorum growing with barley during pre-emergence stage

摘要

Three herbicides, namely Pendimethalin, Trifluralin and Terbutryn were used to control the Italian ryegrass ( Lolium multiflorum ) associated with barley ( Hordeum vulgare ). The first herbicide Pendimethalin gave an effective control of L. multiflorum at doses as low as .125kg a.i/ha and few plants survived with rates 0.5kg a.i/ha. Effects on barley were severe; at dose of 0.25kg a.i/ha barley plants decreased by more than 50%. Trifluralin controlled ryegrass numbers up to 90% at 1kg/ha and caused little damage to barley plants. The last herbicide Terbutryn decreased the numbers of ryegrass plants quite effectively; it also damaged barley plants even at very low doses.