اثر علف کش های آپیروس، توتال، آتلانتیس و شوالیه در کنترل علف های هرز گندم

In order to investigate the effect of Apirus, Total, Atlantis and Chevalier herbicides at different doses on winter wheat, a two-year field experiment was conducted in Research Farm of College of Agriculture, Shiraz University, during 2011-2012 and 2012-2013 growing seasons. The experimental design was a randomized complete blocks with four replications. Treatments were Apirus at 24, 27 and 30 g ha-1, Total at 35, 40 and 45 g ha-1, Atlantis at 1.2, 1.5 and 1.8 L ha-1, Chevalier at 300, 400 and 500 g ha-1, and two weedy and weed free checks. The results showed that application of herbicides in both growing seasons reduced weed dry matter and weeds density compared to the weedy check. Among herbicide treatments, Total at 45 g ha-1, reduced weeds dry matter by 95.9 and 100% that was not significantly different from other doses. Application of Chevalier herbicide, especially at 300 g ha-1, decreased wheat yield compared to the weed free check and did not provide acceptable weed control. The present study showed that Total herbicide was more efficient than other treatments in terms of weed control even at limited doses, and it could be recommended to farmers under Shiraz climatic condition. Further researches for understanding efficacy of these herbicides in winter wheat in different weed densities are recommended.