Assessment of Some Herbicidal Combinations in Wheat Fields of Dierab, Saudi Arabia PDF

Keywords

herbicides, wheat grain, agricultural

Abstract

The efficiency of four herbicides, viz, isoproturon (arelone), methabenzthiazuron (tribunil), fenoxaprop-ethyl (puma) and a ready mix formulation of mecoprop/dichlorprop/MCPA (duplosan super) and some of their combinations in controlling weeds in wheat fields as well as their effect on grain yield and its components were studied at the Agricultural Research and Experimental Station of Dierab in seasons 1991 and 1992 in two different sites. The experimental sites were of loamy sand soil and were under sprinkler and central pivot irrigation system. The results of the study revealed that, Malva spp (common mallow) and Lolium rigidum (ryegrass) were the predominant weeds in the experimental area. Treatments of duplosan super at 3.5 and 2.5 L/ha; combinations of duplosan super (2.5 L/ha) with either tribunil (0.75 kg/ha), arelone (0.75 L/ha) or puma (2.5 L/ha); tribunil (1.5 kg/ha) showed to be most efficient in controlling broad-leaved weeds. Arelone (1.5 and 0.75 L/ha) and puma (3.5 and 2.5 L/ha), on the other hand, gave slight control of the grassy weed Lolium rigidum. The results also showed that duplosan super and its combinations as well as tribunil had significantly increased grain yield in wheat in the first site. On the other hand, duplosan super 2.5 L +puma 2.5 L/ha was the only treatment that significantly increased grain yield in wheat in the second season in the second site