Efficiency of different herbicidesapplication for weed control in wheat underrain fed conditions in iran

ABSTRACT: Weed population is increasing in wheat farms in Alashtar area, Lorestan, Iran annually.So an experiment was conductedduring order to study effects of different herbicides on weed population in this area in 2009-2010 years. The experimental design was a randomized complete block with fourreplications. The treatments were including Teribenuron, 2-4-D, Solfusolfurun, Teribenuron + 2-4-D, Mesosulfuron+ Sulfosulfuron, Bromocinil + MCPA andTriasolfurun + Terbuterin
. The result showed that, the best treatments were Mesosulfuron+ Sulfosulfuron and Teribenuron + 2-4-D by 92%damage to weed. Also, the highest M.chamomillal dry weights (3.8 and 5.8 g/m2) were achieved from those plots which were treated by 2-4-D and Bromocinil + MCPA, respectively so that there was significant difference between these treatments and control treatment. The results demonstrated that, Parsley (Torgenialatifolia L.)was controlled by 2-4-D and Teribenuron + 2-4-D alsoParsley population was decreased to 0 and 1 plant.m-2 in these treatments. While Solfusolfurun, Bromocinil + MCPA and Triasolfurun + Terbuterin
had not significant effect on Parsleypopulation and dry weight of this weed was more than3 g/m2.