Potential risk of drift from inclined fan nozzles

Moraes, Eder Dias de; Saab, Otavio Jorge Grigoli Abi; Gandolfo, Marco Antonio; Marubayashi, Rodrigo Yudi Palhaci; Gandolfo, Ulisses Delvaz

doi:10.1590/1807-1929/agriambi.v23n3p229-233

Cited by 6 publications

(5 citation statements)

References 10 publications

(9 reference statements)

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“…According to Moraes et al (2019), the estimation of the drift potential of a spray can be evaluated by the percentage of droplets with diameters smaller than 100 μm. There is no standard value indicative of drift risk or safe application.…”

Section: Discussionmentioning

confidence: 99%

Spray Deposition on Watermelon Crop in Aerial and Ground Application

Vitória¹,

Alves²,

Rossi³

et al. 2022

JAS

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The quality and quantity production of watermelon requires the effective control of pests, diseases, and weeds, which is directly related to spraying techniques. The method of application of phytosanitary products is essential, but, most of the time, emphasis is given mainly to the applied product and little attention to the application technique. The objective of the present study was to characterize the ejected spray in the aerial and terrestrial spraying of watermelon crops, with the use of adjuvants in a liquid solution. The experiment was carried out in two commercial plantations, in an entirely randomized design, employing a 6 × 2 factorial scheme, with six forms of application and two liquid compositions. The droplet spectrum was assessed employing water-sensitive card imaging. Smaller drop sizes and relative amplitudes were produced by aerial applications. In turn, the largest droplet diameters and the lowest percentage of drops smaller than 100 μm were obtained when using air induction flat double-jet nozzles. The adjuvant did not interfere in the numerical and volumetric median diameters, the relative amplitude, or the volume rate of droplets smaller than 100 μm.

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Section: Discussionmentioning

confidence: 99%

Spray Deposition on Watermelon Crop in Aerial and Ground Application

Vitória¹,

Alves²,

Rossi³

et al. 2022

JAS

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“…However, the climatic conditions of this region, characterized by high temperatures and low relative air humidity, in addition to frequent winds, hinder the fast application of phytosanitary products, essential to control pests, diseases, and/or weeds through spraying (Ferreira, et al, 2013). As a result, this scenario requires the use of technologies that minimize the losses of such products by drift while facing problems such as efficacy reduction due to direct loss and the contamination of the environment and neighboring sensitive crops (Muziu et al, 2019;Moraes et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Air assistance and spray volumes on the coverage, droplet density, and spray deposition in melon plants

Oliveira Fontes,

Lopes de Freitas,

Martins Teixeira

et al. 2024

Com. Sci.

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This study aimed to evaluate the influence of air assistance on the coverage, droplet density, and deposition of the mixture volume applied to melon plants. The experiment was conducted in a completely randomized design set up in a 4 x 4 x 2 factorial arrangement referring to four spray nozzles (AVI 110-02, TT 110-02, AVI 110-03, and TT 110-03), four mixture volumes (140, 200, 300, and 400 L ha-1), and two application techniques (with and without air assistance), at a constant working pressure of 300 kPa. Deposition analysis was performed by using a bright blue dye, and the coverage pattern and droplet density were analyzed using water-sensitive paper tags attached to the adaxial and abaxial surfaces of the leaf blade of melon plants. Air assistance in the spray boom improved the deposition of the mixture sprayed on melon leaves only when using nozzle TT 110-02, whereas nozzles TT 110-03, AVI 110-02, and AVI 110-03 were not influenced by air assistance. Coverage and spray deposition on the adaxial leaf surface increased with the mixture volume applied for all nozzles. The technique using water-sensitive tags is not efficient to evaluate droplet density when working with high spray volumes.

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“…During pesticides application, there are particular concerns regarding the efficiency of spraying; among them, the percentage of coverage, which is the disposition of spray droplets over the crop. Therefore, the efficiency of pesticide application can be defined simply by the volume of pesticide reaching the intended target divided by the total amount applied (MASSOLA et al, 2018;MORAES et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Deposition of spray droplets by four spray nozzles and two working pressures

Nascimento¹,

Cerzosimo²,

Compagnoni³

et al. 2023

R. Agrogeoambiental

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The deposition of spray droplets on the target can be influenced by the type spray nozzle used, as well as the employed working pressure. Thus, with the commercial availability of new spray nozzles, performance studies with the new models become necessary. This study was carried out to evaluate ground deposition of spray droplets by four models of spray nozzles, at two working pressures. The experiment was conducted in Dourados/MS, in September 2020, with strip design and 4x2 factorial scheme, with five repetitions. Four spray nozzles were used (single flat fan, ST-IA 02 model; angle flat fan MUG 02; hollow cone MGA 02; and double flat fan ST-IA/D 02), working at 30 and 50 psi pressures. The distance between each nozzle was 50 cm, 60 cm above the ground. Water-sensitive paper was used and, immediately after application, the paper was scanned using the DropScan® tool. Subsequently, the number of droplets, coverage, amplitude, dispersion, Volume Median Diameter (VMD), Number Median Diameter (NMD), DV09, and DV01 were evaluated. The hollow cone spray nozzle provided a higher number of droplets and greater coverage compared to the other nozzles for the studied weather conditions.

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Potential risk of drift from inclined fan nozzles

Cited by 6 publications

References 10 publications

Spray Deposition on Watermelon Crop in Aerial and Ground Application

Spray Deposition on Watermelon Crop in Aerial and Ground Application

Air assistance and spray volumes on the coverage, droplet density, and spray deposition in melon plants

Deposition of spray droplets by four spray nozzles and two working pressures

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