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

Assunção, Heli Heros Teodoro de; Silva, Sérgio M.; Alves, Guilherme Sousa; Zandonadi, César Henrique Souza; Cunha, João Paulo Arantes Rodrigues da

doi:10.1590/1809-4430-eng.agric.v39n6p721-728/2019

Cited by 5 publications

(5 citation statements)

References 17 publications

(28 reference statements)

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“…The use of a synthetic adjuvant increased the charge/mass ratio of the spray solution with only insecticide or water spray alone. A similar trend was observed by Assunção et al (2019b). In the first application (37 DAS), the spray deposition in the upper and lower thirds of the maize plants, and the losses to the soil, presented significant differences between the levels of the application technique, and among the spray solutions for the upper third.…”

Section: Test 1 and 2 -Determination Of The Electrical Conductivity Osupporting

confidence: 78%

“…As demonstrated in Figure 1, the increase in the electrical conductivity increases the droplet charge; and higher charges tend to increase the deposition on targets (Assunção et al, 2019b). Increased deposition was also observed in case of the synthetic adjuvant sprayed without electrostatic electrification, since there was no interaction between the application technique and the spray solution.…”

Section: Application Techniquementioning

confidence: 78%

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Spray Deposition on Maize Using an Electrostatic Sprayer

et al. 2020

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It is a well-known fact that the application of pesticides can be improved using an electrostatic spray due to the reduction of the application rate and increase in deposition on plant targets. However, little information exists on the use of such technology in maize crops. Thus, this study is aimed to evaluate the spray deposition on maize resulting from spray application using an electrostatic sprayer in combination with low application rates and different spray compositions. A field experiment was conducted in a randomized block having a 2×2×2 factorial design with two application rates (95 and 52 L ha-1), with or without the spray electrification, and with or without the synthetic adjuvant. The droplet electrification ability, interference of the electrical conductivity of the spray solution, losses of spray solution to the soil, and spray deposition on maize plants were evaluated for two cases of insecticide applications. The Faraday cage method was used to determine the spray electrification ability of the equipment. The spray deposition on plants and the losses to the soil were analyzed using a tracer (food coloring dye) added to the spray solution that was subsequently detected by spectrophotometry. It was seen that the electrostatic sprayer improved the spray application efficiency, which responded positively to the increase in the electrical conductivity of the spray solution. The deposition of the electrified spray solution on the upper third canopy of maize was found to be higher; the spray solution electrification also reduced the losses to the soil, regardless of the application rate.

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Section: Test 1 and 2 -Determination Of The Electrical Conductivity Osupporting

confidence: 78%

Section: Application Techniquementioning

confidence: 78%

Spray Deposition on Maize Using an Electrostatic Sprayer

et al. 2020

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“…With the obtained results, for the upper stratum of the plants (Table 1), regardless of the application rate used, the hollow cone tip with the use of electrostatic technology provided a greater increase in the captured spray volume compared to the hollow cone applied without the addition of droplet electrification technology, with an increasing in this characteristic of 13.63%. In contrast to the present work, Assunção et al (2019) did not find an increase in spray deposition due to droplet electrification, with the benefit of increasing application rates being more evident for these authors.…”

Section: Resultscontrasting

confidence: 99%

Application rate and nozzles associated with droplet electrification affect the spraying quality in common bean

Mello,

Carmo,

Braz

et al. 2024

Rev. bras. eng. agríc. ambient.

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The objective of this work was to evaluate the application efficiency of different nozzle tips associated with increasing application rates. A field experiment was conducted in a factorial 3 × 4 randomized block design with four replicates. The first factor consisted of three types of nozzle tips (simple flat fan, hollow cone, and hollow cone with the electrification of the drops), and the second factor constituted the four application rates (50, 100, 200, and 250 L ha-1). Electrostatic technology and a hollow cone tip increased the deposited volume on leaves on the upper and medium strata of the common bean plant, regardless of the application rate used. The increase in the application rate increased the volume of spray solution captured in the upper, medium, and lower strata, the drop density, the volumetric median diameter (VMD), and the percentage of foliar coverage, regardless of the spray tip evaluated. The percentage of leaf coverage on the adaxial and abaxial leaf was not influenced by the simple fan or hollow cone spray tips, with or without the association of electrostatic technology.

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“…The fungicide azoxystrobin 1 benzovindiflupyr (Mural; Syngenta, Greensboro, NC) significantly reduced the powdery mildew disease severity and disease progress (AUDPC) compared with the nontreated control. The similar efficacy of azoxystrobin 1 benzovindiflupyr in reducing the powdery mildew of flowering dogwood and soybean (Glycine max) were observed (Assunção et al, 2019;Baysal-Gurel and Simmons, 2018). In this current study the efficacy of both rates of azoxystrobin 1 benzovindiflupyr were statistically like each other in reducing the powdery mildew severity and disease progress (AUDPC).…”

Section: Discussionmentioning

confidence: 54%

Management of Powdery Mildew on Ninebark Using Sanitizers, Biorational Products, and Fungicides

Baysal-Gurel¹,

Bika²

2021

horts

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Ninebark (Physocarpus opulifolius) is a popular ornamental shrub and considered a hardy and tough plant that can thrive in different environmental conditions and resist diseases. However, powdery mildew, caused by Podosphaera physocarpi, can severelyaffect ninebark, deteriorating the ornamental value and making them unmarketable. Only a few studies have been done in managing powdery mildew of ninebark. The current study focuses on evaluating and identifying effective products (sanitizers, biorational products, and fungicides) for the management of powdery mildew disease of ninebark. A total of 12 treatments, including nontreated control, were studied. The experiment was arranged in randomized complete block design with four-single ‘Mindia Coppertina®’ ninebark plant per treatment and repeated twice. Powdery mildew disease severity, growth parameters, and phytotoxicity were assessed in the study. All treatments significantly reduced the powdery mildew disease severity and disease progress [area under disease progress curve (AUDPC)] compared with the nontreated control. The treatments, such as azoxystrobin + benzovindiflupyr at 0.17 and 0.23 g·L–1 total active ingredients (a.i.) applied, chlorothalonil + propiconazole at 1.12 mL·L–1 total a.i. applied, azoxystrobin + tebuconazole at 0.11 and 0.16 g·L–1 total a.i. applied, and giant knotweed extract [Reynoutria sachalinensis (0.5 mL·L–1 total a.i. applied)] were the most effective treatments in reducing disease severity and disease progress in both trials. The treatments had no significant effects on the plant growth parameters such as height and width. In Expt. 2, azoxystrobin + benzovindiflupyr and hydrogen peroxide + peroxyacetic acid treated plants showed the low level of phytotoxic symptoms. The phytotoxicity of these two treatments in Expt. 2 could be related to higher environmental temperature during the experimental period.

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

Cited by 5 publications

References 17 publications

Spray Deposition on Maize Using an Electrostatic Sprayer

Spray Deposition on Maize Using an Electrostatic Sprayer

Application rate and nozzles associated with droplet electrification affect the spraying quality in common bean

Management of Powdery Mildew on Ninebark Using Sanitizers, Biorational Products, and Fungicides

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