Agrology (Feb 2023)
Effectiveness of herbicides and plant growth regulators in corn crops
Abstract
The objective of this study was determining the effectiveness of weed control and increasing the productivity of the DN Galatea corn hybrid when using modern herbicides, plant growth regulators and adjuvants. Indicators of the technical efficiency of herbicides differed according to the variants of the experiment, which generally characterizes the phytotoxic properties of the agents as a different indicator. At the initial stage of the development of the corn agrocoenosis, the highest efficiency was provided by: Task Extra(880g/ha) + Synergen SOC(0.25%) – 92%; Titus Extra(50 g/ha) + Synergen SOC(0.15%) – 39%; Titus Extra(100 g/ha) + Synergen SOC (0.25%) – 94%; Titus Extra(50 g/ha) + Prima(0.4 L/ha) + Synergen SOC(0.15%) – 94%. As can be seen from the figures, the corn crops in those variants were free of weeds during the phases of panicle shedding. Effective control of the invasion of weeds in corn, but with lower technical efficiency options, was demonstrated by Task Extra (440g/ha) + Trend 90 (0.1%) – 85%; Task Extra (440g/ha) + Synergen SOC (0.15%) – 89%; Titus Extra (50 g/ha) + Trend 90 (0.2%) – 86%; Titus Extra (100 g/ha) + Trend 90 (0.2%) – 88%. The application of the Master Power (1.5 L/ha) – 70% also caused a less significant effect; this was not the first year we observed this. Based on the results of the research in our laboratory, we can conclude that the Master Power is significantly inferior to the herbicide Master (150 g/ha) + Biopower (1.25 L/ha), which was more effective. The highest above-ground biomass of weeds in the air-dry state was traditionally recorded in the control version without the introduction of the agents – 109.7 g/m2. The characteristics of the weed flora on the research plots are also given, as well as the evaluation of the elements of the structure of the corn hybrid crop with the use of the specified agents.
