Effect of spray droplet size, spray volume and fungicide on the control of white mold in soybeans

Berger-Neto, Ayrton; Jaccoud-Filho, David de Souza; Wutzki, Carlos Rafael; Tullio, Hamilton Edemundo; Pierre, Marcelo Luiz Cunha; Manfron, Felipe; Justino, Altair

doi:10.1016/j.cropro.2016.10.016

Cited by 42 publications

(31 citation statements)

References 12 publications

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“…Overall, results showed procymidone treatments resulted in greater reduction in S. sclerotiorum sclerotia than fluazinam in both 2013 and 2014 (Table 3), although differences were marginal in 2014 due to low disease pressure. This is in concordance with a publication that showed procymidone was more effective than fluazinam in reducing the number of sclerotia produced on infected plants (Berger-Neto et al, 2017). In 2013, procymidone showed greater reduction in weight of residual sclerotia and greater reduction in number of sclerotia collected in soil irrigated at the highest level (6 mm).…”

Section: Discussionsupporting

confidence: 80%

Control of white mold of dry bean and residual activity of fungicides applied by chemigation

2017

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Section: Discussionsupporting

confidence: 80%

Control of white mold of dry bean and residual activity of fungicides applied by chemigation

2017

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“…reported that the appropriate water volume depended on the sprayer (airblast sprayer or air‐assisted rotary atomizer low‐volume sprayer) and pesticide use in juice grapes. Berger‐Neto et al . compared two spray volumes of 100 and 200 L ha −1 , and concluded that spray volume did not affect control of white mold in soybean.…”

Section: Introductionmentioning

confidence: 99%

“…The majority of previous studies have focused on the working parameters and downwash airflow field. However, spray volume also has an important influence on droplet deposition 2 and control efficacy, 18,19 but unfortunately, no conclusive results are available. Using low-volume aerial application, Kirk et al 20 found that tracer deposits were higher at the top of the cotton canopy at a higher spray rate of 46.8 L ha −1 .…”

Section: Introductionmentioning

confidence: 99%

“…Wise et al 28 reported that the appropriate water volume depended on the sprayer (airblast sprayer or air-assisted rotary atomizer low-volume sprayer) and pesticide use in juice grapes. Berger-Neto et al 19 compared two spray volumes of 100 and 200 L ha −1 , and concluded that spray volume did not affect control of white mold in soybean. In addition, Garcerá et al 29 also found that spray application volume had no effect on two of the organophosphate insecticides controlling California red scale infestation; the appropriate spray volume was influenced by the sprayer and varied from one pest or target area to another.…”

Section: Introductionmentioning

confidence: 99%

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Field evaluation of an unmanned aerial vehicle (UAV) sprayer: effect of spray volume on deposition and the control of pests and disease in wheat

Wang

Lan

Huang

et al. 2019

Pest Management Science

165

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BACKGROUND Unmanned aerial vehicles (UAVs) are a recently developed aerial spraying technology. However, the effect of spray volume variation on deposition and pesticide control efficacy is unknown. The effect of three UAV spray volumes (9.0, 16.8 and 28.1 L ha−1) using three different nozzle sizes on droplet deposition and wheat aphid and powdery mildew control efficacy was assessed. An electric air‐pressure knapsack (EAP) sprayer was used as a comparison. RESULTS Different spray volumes significantly influenced the deposition and control efficacy of the UAV and EAP. For the UAV, a low spray volume of 9.0 L ha−1 with a fine nozzle (nozzle LU120‐01) resulted in lower deposition and control efficacy. Optimal control efficacy was achieved with coarser nozzles (nozzles LU120‐02, ‐03) at > 16.8 L ha−1 volume with systemic insecticide, and at 28.1 L ha−1 with contact insecticide and fungicide. For EAP, a high spray volume led to run‐off, and a spray volume of 225 L ha−1 achieved better deposition and control efficacy. CONCLUSION The UAV had comparable deposition and efficacy control to the EAP at a higher spray volume (> 16.8 L ha−1) with coarse nozzles, but exhibited inferior deposition and efficacy control at a lower spray volume (<9.0 L ha−1) with fine nozzles. © 2019 Society of Chemical Industry

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“…Sample collectors at each sample site consisted of one water-sensitive papers (WSPs; 25 mm × 75 mm; Figure 2B). The WSPs were used to evaluate the deposition characteristics such as droplet coverage rare and droplet size [32,33] . The WSPs were fixed to cotton leaves using paper clips [13] .…”

Section: Spray-deposition Measurementsmentioning

confidence: 99%

Effects of alkyl ethyl sulfonate dosage on cotton defoliation efficacy sprayed by UAV

Xiao

Zhou

et al. 2018

International Journal of Precision Agricultural Aviation

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As a new low volume sprayer, unmanned aerial vehicle (UAV) application is developing quickly worldwide. Alkyl ethyl sulfonate soluble concentrate is a kind of spray adjuvants for defoliants, which is widely used in cotton defoliant application. The aim of this study was to compare the droplet deposition, defoliation and boll opening of a UAV added with six dosages of alkyl ethyl sulfonate on the cotton. Addition with 4.2 g a.i./hm 2 (one-sixtieth of the recommended dosage in the field) alkyl ethyl sulfonate could significantly increase the droplets coverage rate, and improve defoliation and boll opening effects. Added with lower dosage alkyl ethyl sulfonate (4.2 g a.i./hm 2 and 8.4 g a.i./hm 2), the droplet distribution uniformity was much better than that of moderate (84 g a.i./hm 2) and high dosage (252 a.i./hm 2) of alkyl ethyl sulfonate. It could not only ensure the effects of defoliation and boll opening, but also reduce the environmental pollution by alkyl ethyl sulfonate.

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Effect of spray droplet size, spray volume and fungicide on the control of white mold in soybeans

Cited by 42 publications

References 12 publications

Control of white mold of dry bean and residual activity of fungicides applied by chemigation

Control of white mold of dry bean and residual activity of fungicides applied by chemigation

Field evaluation of an unmanned aerial vehicle (UAV) sprayer: effect of spray volume on deposition and the control of pests and disease in wheat

Effects of alkyl ethyl sulfonate dosage on cotton defoliation efficacy sprayed by UAV

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