Effects of news sowing arrangements and air assistance on fungicide spray distribution on soybean crop

Souza, Diego Miranda de; Raetano, Carlos Gilberto; Moreira, Caio Alexandre Ferreira; Bueno, Regiane Cristina Oliveira de Freitas; Carvalho, Marina Mouzinho

doi:10.4025/actasciagron.v41i1.42700

Cited by 2 publications

(1 citation statement)

References 18 publications

(22 reference statements)

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“…In this case, the use of electrostatics, was also not enough to optimize the range of the drops at the bottom of the plant. This can once again be attributed to the greater difficulty of penetrating the drops at the stage of development with the highest leaf area index (Souza et al 2019).…”

Section: Captured Spray Volumementioning

confidence: 99%

Journal of Plant Protection Research

Mello,

Do Carmo,

Braz

et al. 2021

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There is an ongoing search for technologies that guarantee soybean productivity. Among them, the application of phytosanitary products stands out, since the sprayer is the most required implement during the agricultural production cycle and each error, in practice, represents a loss in the production process. With this in mind, the objective of this work was to evaluate the volume captured and the characteristics of the application in the different thirds of soybean plants with variations in hydraulic nozzles and spray volumes, as well as the use of electrification of the drops. To this end, a field experiment was conducted during the 2018/2019 summer harvest in an experimental area at the University of Rio Verde. The experimental design used was randomized blocks in a factorial scheme (3 × 4), with four repetitions, in which the first factor consisted of three variations of spray nozzles (simple fan, hollow cone and hollow cone with electrification of the drops). The second factor involved four application rates (50, 100, 150 and 200 l • ha -1 ). The variables evaluated were the number of drops per cm -2 , percentage of coverage, volume median diameter (VMD) and the captured volume (µl • cm -2 ). According to the results, for the upper thirds, an increase in the application rate increased the volume of captured syrup. However, for the lower third, the factors evaluated did not interfere in this characteristic. The hydraulic tips influenced the density of droplets in the three thirds and the coverage only in the lower one. The increasing rates of application, increases the density of drops and percentage of coverage in the different thirds of the plants. The evaluated factors had no effect on the syrup distribution on the median abaxial surface of the leaves.

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Section: Captured Spray Volumementioning

confidence: 99%

Journal of Plant Protection Research

Mello,

Do Carmo,

Braz

et al. 2021

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Air Assistance and Electrostatic Spraying in Soybean Crops

Bueno,

Sousa Alves,

Silva

et al. 2024

Agrochemicals

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This study aimed to evaluate the efficiency of air assistance associated with electrostatic spraying in terms of spray deposition and yield (Experiment 1), and the coverage and droplet density on soybean crops at different working speeds (Experiment 2). The treatments in Experiment 1 corresponded to combinations of electrostatic systems associated with air assistance at three airspeeds (21, 25, and 30 m·s−1) plus a conventional treatment without electrostatic or air assistance. The treatments in Experiment 2 corresponded to three working speeds (3.3, 4.2, and 5.0 m·s−1) with or without the use of an electrostatic system. All applications were performed with a self-propelled sprayer, delivering 75 L·ha−1 with ATR 2.0 nozzles. A blue tracer, detectable as absorbance with a spectrophotometer, was added to the spray solution to evaluate deposition. The results indicate that an air assistance at 21 m·s−1 plus electrostatic system increased the amount of spray deposited on the middle and top leaves of the plants in relation to the conventional system, with yield increments of up to 621 kg·ha−1. The slowest working speed (3.3 m·s−1) combined with air assistance and an electrostatic system provided the greatest spray deposition, droplet coverage, and density on the bottom leaves of soybean crops.

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Effects of news sowing arrangements and air assistance on fungicide spray distribution on soybean crop

Cited by 2 publications

References 18 publications

Journal of Plant Protection Research

Journal of Plant Protection Research

Air Assistance and Electrostatic Spraying in Soybean Crops

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