تاثیر میزان و نوع علفکش های خاک مصرف در مدیریت علفهای هرز کنجد (Sesamum indicum L. ) متحمل به ریزش دانه در گنبد کاووس

This research was conducted to investigate the influence of sesame weeds on the type and amount of soil herbicides used and different pre-emergent on the characteristics of weeds. For this purpose, an experiment was conducted based on a randomized complete block design in four replications in the crop year of 1402 and 1401 in Gonbad-e Kavus. A. The pesticides under investigation are Surpass (Acetochlor) 1.5 and 2 lit/ha, Afalon (Linuron) 1.5 and 2 lit/ha, Stump (Pendimethalin) 2 and 3 lit/ha, Prol (Pendimethalin) 2 and 3 lit/ha, Rifit (Pretilachlor) 1.5 and 2 lit/ha, Treflan (Trifluralin) 1.5 and 2 lit/ha. To prevent the interference of the experimental treatments and other stages of the experiment, 1 and 0.5 m was considered between the treatments. The distance between blocks/repetitions was 2 meters. Sesame seeds were planted in experimental units of 6 kg/he. The distance between the rows was considered 30 cm. The herbicide was applied in the first half of each plot and the second half of each plot was the control plot. After 30 days of applying the treatments, the dry weight and the number of weed species as well as the density and dry weight of sesame were weighed and determined. Results showed that there was a significant difference between the treatments in the number of weeds, wet weight of weeds and dry weight of weeds at the level of 1%. The highest number of weeds was observed in the control treatment and then in the Afalon 1.5 treatment, and the lowest number of weeds was observed in the Surpass 2 and Rifit 2 treatments. The highest amount of fresh weight was observed in the control treatment with 13.36 gr. and Refit 2 treatment with 10.6 gr. and the lowest amount of fresh weight was observed in Surpass 2 treatment with 4.35 gr.