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Normalized difference vegetation index for desiccation evaluation with glyphosate + 2,4-D in magnetized spray
C B Alvarenga1, G S M Mundim1, E A Santos1
1Universidade Federal de Uberlândia - UFU, Instituto de Ciências Agrárias, Monte Carmelo, MG, Brasil.
Summary
Water magnetization did not improve herbicide effectiveness for weed control. However, higher herbicide doses led to better weed control and lower vegetation index values, showing a strong correlation.
Area of Science:
- Agricultural Science
- Agronomy
- Weed Science
Background:
- Water magnetization and geoprocessing are emerging techniques in modern weed management strategies.
- Understanding the impact of water properties on herbicide efficacy is crucial for optimizing weed control.
Purpose of the Study:
- To investigate the influence of magnetized water on the efficiency of herbicides.
- To determine the relationship between weed control scores and the Normalized Difference Vegetation Index (NDVI).
Main Methods:
- Laboratory analysis of magnetized water properties (pH, surface tension).
- Field experiment with Brachiaria grass using factorial treatments of glyphosate and glyphosate + 2,4-D, with and without water magnetization.
- Six assessments of weed control and multispectral imaging for NDVI calculation.
Main Results:
- Water magnetization altered water pH and surface tension but did not impact weed control scores or NDVI.
- Increased glyphosate doses resulted in higher weed control scores and lower NDVI values.
- A strong correlation was observed between weed control scores and NDVI values.
Conclusions:
- Magnetized water does not enhance the biological efficacy of the tested herbicides.
- NDVI is a reliable indicator for assessing weed control effectiveness.
- Herbicide dose remains the primary factor influencing weed control outcomes.
