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 2021 growing season. the herbicides included amaize-ing (terbuthylazine, 50% sc) at the rates of 1, 1.2, 1.5, 1.8, and 2 l/ha, isoxaflutel + tincarbazone (adango 46.5% sc), mesotrione + s-metolachlor + lumax (lumax 53.75% se), u46 combi fluid (2,4-d + mcpa 67.5% sl), bromicide ma (bromoxynil + mcpa 40% ec), and bromicide ma (bromoxynil + mcpa 40% ec) + cruze (nicosulfuron 4% 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 1.8 and 2 l/ha concentrations of amaize-ing, adengo, lumax, u46 combi fluid, bromicide ma, and bromicide ma + cruze herbicides had a favorable effect on redroot pigweed and common lambsquarters. it resulted in a 20 to 30% increase in corn yield. the highest chlorophyll content and leaf weight of corn were associated with treatments of adengo, lumax, u46 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 1.8 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.