WEED MANAGEMENT USING CHEMICAL AND MECHANICAL HOES IN MAIZE CULTIVATION
DOI:
https://doi.org/10.32404/rean.v13i1.9267Keywords:
Glyphosate, Weed interference period, Productivity, Weed competitionAbstract
Maize cultivation is affected by weed interference due to competition for nutrients, light, water, and space. In addition, both chemical and mechanical management can compromise crop productivity. This study aimed to determine whether the superficial soil disturbance caused by the use of a manual mechanical hoe interferes with maize plant development and grain yield, according to different weed competition periods throughout the crop cycle, compared to chemical control using a chemical hoe with the herbicide glyphosate. The experiment was conducted under a no-tillage system in the municipality of Jataí, Goiás, during the 2021/22 growing season. A randomized block design in a 2×4 factorial scheme was adopted, in which treatments consisted of combinations of management methods (mechanical hoe and chemical hoe) and different weed management times (10, 20, 30, and 60 days after sowing – DAS). In the chemical hoe treatment, glyphosate was applied at a 5:1 ratio. The evaluated variables included plant height, stem diameter, number of rows per ear, number of kernels per row, ear length and diameter, and grain yield. Chemical management reduced stem diameter and ear length and diameter; however, no significant difference in grain yield was observed compared to the use of the manual hoe. It can be concluded that mechanical weeding does not harm the crop’s agronomic characteristics. Grain yield decreases with delayed weed control timing.
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