Spray Deposition on Soybean Crop Using Different Travel Speeds and Application Rates

Abstract

Farmers are seeking pesticide treatments with lower application rates and higher travel speeds. However, this can lead to a poor quality of the application. The aim of this study was to evaluate the spray deposition on soybean crop and the droplet spectra using different application rates and speeds. The experiment was conducted in soybean (R5 stage), M 6410 IPRO variety. Six treatments involving two application rates (80 and 150 L ha-1) and three speeds (10, 15 and 20 km h-1) were evaluated through a self-propelled sprayer. A characterization study of the spray droplets was conducted through the evaluation of water sensitive papers. The spray deposition study was carried out. For this, a marker was added to the application to be detected by absorbance in spectrophotometry. The use of spray nozzles with higher nominal flow, as well as lower pressures, produced droplets of larger sizes. The application rate of 80 L ha-1 provided equal and higher spray retention in the lower and upper leaves of the plants, respectively. The three speeds did not influence the deposition on soybean plants.

Electrostatic Spraying Effect on Spray Deposition and Powdery Mildew Control in Soybean

“…Strategies to improve the efficiency of pesticide applications include the sprayer equipment, spray solution characteristics, and operation planning. Currently, there is a tendency to reduce application rates in order to minimize operational costs (Cunha et al, 2018;Ferguson et al, 2016).…”

Droplet Distribution as a Function of Cotton Interrow Spacing and Angles of Sprayer Displacement

“…The morphological characteristics of plants can affect the quality of pesticide application since application technology factors, such as jet trajectory, application uniformity, number of droplets, droplet diameter, droplets reaching the target, droplet evaporation, and drift, can be influenced by changes in plant architecture, such as height and leaf area (Cunha et al, 2008;Cunha et al, 2018), as occurs in the ultra-narrow row and narrow row cultivation systems in relation to the conventional cultivation system.…”

Use of Remotely Piloted Aircrafts for the Application of Plant Protection Products

“…Besides accounting for a substantial amount of the production cost, phytosanitary treatments are also among the main components of the production process of any crop, as the application of fungicides, insecticides, and herbicides help preserve the health of the crop until the end of the production cycle, thereby assisting each cultivar or variety to reach its production quantity and quality potential, as determined by its genetics (Cunha et al, 2018). However, the use of these products, especially when they are applied indiscriminately, can damage the crop, the environment, and living beings, either by direct or indirect contact, owing to the persistence of its molecules in the biotic and abiotic environments of ecosystems (animals, soil, air, water, plants, etc.…”