The impact of herbicides on weed control and physiological traits in corn (Zea mays L.)

Objective: This research aimed to evaluate the effect of herbicides on weed control and physiological traits in corn (Zea mays L.).Methods: An experiment was performed using a randomized complete block design with four replications at the Agricultural and Natural Resources Research Center of Moghan, Iran, during the ۲۰۲۱ growing season. The herbicides included Amaize-ing (Terbuthylazine, ۵۰% SC) at the rates of ۱, ۱.۲, ۱.۵, ۱.۸, and ۲ L/ha, Isoxaflutel + Tincarbazone (Adango ۴۶.۵% SC), Mesotrione + S-metolachlor + Lumax (Lumax ۵۳.۷۵% SE), U۴۶ Combi Fluid (۲,۴-D + MCPA ۶۷.۵% SL), Bromicide MA (Bromoxynil + MCPA ۴۰% EC), and Bromicide MA (Bromoxynil + MCPA ۴۰% EC) + Cruze (Nicosulfuron ۴% SC).Results: The analysis of variance revealed a significant difference among treatments in terms of weed density, weed dry weight, corn grain yield, chlorophyll index (SPAD), leaf weight, proline, and catalase activity. The use of ۱.۸ and ۲ L/ha concentrations of Amaize-ing, Adengo, Lumax, U۴۶ Combi Fluid, Bromicide MA, and Bromicide MA + Cruze herbicides had a favorable effect on redroot pigweed and common lambsquarters. It resulted in a ۲۰ to ۳۰% increase in corn yield. The highest chlorophyll content and leaf weight of corn were associated with treatments of Adengo, Lumax, U۴۶ Combi Fluid, Bromicide MA, and Bromicide MA + Cruze. However, the Amaize-ing herbicide had a smaller effect on the leaf weight of corn. Also, increasing the concentration of Amaize-ing increased the proline content and activity of catalase in corn.Conclusion: In conclusion, it seems that the use of ۱.۸ L/ha of A-mazing and Adengo herbicides can have an effective role in controlling weeds, leading to an increase in leaf weight, photosynthetic capacity, and ultimately corn grain yield.

کلیدواژه ها:

Antioxidant enzymes ، Density ، Dry weight ، Terbuthylazine herbicide