Drift potential from a solid set canopy delivery system and an axial–fan air–assisted sprayer during applications in grapevines

Sinha, Rajeev; Ranjan, Rakesh; Khot, Lav R.; Hoheisel, Gwen‐Alyn; Grieshop, Matthew J.

doi:10.1016/j.biosystemseng.2019.10.015

Cited by 29 publications

(23 citation statements)

References 20 publications

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“…A traditional airblast sprayer axial fan (90 cm diameter) can produce air volumes up to 47 m 3 /sec, compared to the Croplands SARDI fans (38 cm diameter) on the Quantum Mist TM sprayer which can produce 3.35 m 3 /sec each when operated at 2000 rpm (Furness 2005). Higher air outputs are more suited for larger canopies and can create more drift in smaller canopies (Pergher and Gubiani 1995, Grella et al 2017, Sinha et al 2019. Drift on the ground may be additionally attributed to the differences in foliage density over the vertical height of the vine.…”

Section: Discussionmentioning

confidence: 99%

Assessment of Three Commercial Over-the-Row Sprayer Technologies in Eastern Washington Vineyards

et al. 2021

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Washington wine grape growers are rapidly adopting vineyard management technologies such as mechanical pruners and harvesters but have been slower to adopt new chemical application technologies. Therefore, this study was aimed at generating technical information about commercial over-the-row sprayers deposition and drift, which could be used by growers during sprayer selection and optimization for different vineyard systems and wine grape canopies. Three commercial sprayer technologies, i.e. multi-fan heads, pneumatic, and

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Section: Discussionmentioning

confidence: 99%

Assessment of Three Commercial Over-the-Row Sprayer Technologies in Eastern Washington Vineyards

et al. 2021

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“…Solid set canopy delivery systems are a network of tubes that cover an entire field and apply pesticides through nozzles positioned in the plant canopy. In testing, these systems have had equivalent control of insect pests and similar deposition on plant tissues to standard air blast sprayers, with less drift 41 . Although solid set canopy delivery systems are still in the research phase, they may become more robust and reliable as an alternative for ground spray equipment, and could make applying pesticides without humans in the field and during short periods of ideal conditions possible.…”

Section: Future Precision Sprayer Trends and Opportunitiesmentioning

confidence: 99%

Canopy spray application technology in specialty crops: a slowly evolving landscape

Warneke

Zhu

Pscheidt

et al. 2020

Pest Management Science

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Many specialty crops are susceptible to insects and diseases, and as such are reliant on regular canopy pesticide applications to achieve quality attributes required for salability. The majority of specialty crop producers continue to use antiquated pesticide application technologies for directed canopy spraying such as the radial air blast sprayer that has been associated with chemical wastage and off‐target drift of around 40% and 15% of total applied spray volume, respectively. However, precision sprayers are available that result in remarkable improvements to these parameters. The wide‐scale adoption of precision sprayers by specialty crop producers remains low. Reasons for the continued dominance of old technologies include risk averseness of farmers and regulatory bottlenecks. However, as farm labor becomes more expensive, less available, and consumers and regulations favor sustainably produced products, motivations to improve spray application efficiency are increasing. While there are many opportunities and future directions application technology may take, sensor‐controlled sprayer technology that applies a proportionate amount of spray will likely be the primary technology of precision sprayers going into the future. © 2020 Society of Chemical Industry

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“…One of the variants of a fixed spray delivery system, a solid set canopy delivery system (SSCDS), has shown potential to be an alternative to conventional air-assisted sprayers [9][10][11][12]. Typically, an SSCDS is a hydraulic pressure-operated spray delivery system consisting of a network of spray lines and micro-emitters installed within the canopy to achieve effective spray performance while reducing pesticide drift through targeted spraying [10,11,[13][14][15][16]].…”

Section: Introductionmentioning

confidence: 99%

“…Typically, an SSCDS is a hydraulic pressure-operated spray delivery system consisting of a network of spray lines and micro-emitters installed within the canopy to achieve effective spray performance while reducing pesticide drift through targeted spraying [10,11,[13][14][15][16]]. An applicator system, with a spray tank, a gasoline pump, and an air-compressor, was used to feed the spray lines with spray liquid and compressed air during different SSCDS operational stages [9,12]. Such systems have been evaluated in the past for spray application in apples, wine grapes, and other tree-fruit canopies [10][11][12]16,17].…”

Section: Introductionmentioning

confidence: 99%

Effect of Emitter Modifications on Spray Performance of a Solid Set Canopy Delivery System in a High-Density Apple Orchard

et al. 2021

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Optimally configured solid set canopy delivery systems (SSCDS) can provide adequate spray performance in high-density apple orchards with a minimized risk of off-target pesticide drift. SSCDS configured in a shower-down emitter arrangement have been reported to be the simplest and most economical system. However, existing off-the-shelf emitters used in shower-down configurations have resulted in minimal deposition in lower canopy zones. Therefore, this study was focused on the modifications of off-the-shelf emitters to obtain a desirable spray pattern for adequate spray deposition in all the canopy zones. The modifications include redesigning the impact plate of two existing micro-emitters. Field tests were conducted to evaluate the spray performance of SSCDS with the non-modified emitters (treatment: SD1 and SD3) and contrast the results with modified emitters (treatment: SD2 and SD4). While the treatments SD1 and SD3 had off-the-shelf emitters with swivel plate and static spreader, respectively, the treatment SD2 and SD4 had similar emitters with modified impactor plates. In each treatment block, the apple canopy was divided into six zones and sprayed with a 500 ppm fluorescent tracer solution. Mylar cards and water-sensitive paper samplers were placed on the adaxial and abaxial leaf surfaces in each canopy zone to quantify spray deposition and coverage, respectively. The SSCDS treatments retrofitted with modified emitters, i.e., SD2 and SD4, were observed to have uniform and numerically higher deposition and coverage compared to SD1 and SD3. The SSCDS treatment with modified static spreader (i.e., SD4) resulted in the highest overall spray deposition (1405.7 ± 156.4 ng cm−2 [mean ± standard error]) with improved mid (1121.6 ± 186.9 ng cm−2) and bottom (895.6 ± 149.3 ng cm−2) canopy deposition. Overall, the proposed emitter modification assisted in improved SSCDS spray performances and may be a way forward toward large-scale emplacements of such systems.

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Drift potential from a solid set canopy delivery system and an axial–fan air–assisted sprayer during applications in grapevines

Cited by 29 publications

References 20 publications

Assessment of Three Commercial Over-the-Row Sprayer Technologies in Eastern Washington Vineyards

Assessment of Three Commercial Over-the-Row Sprayer Technologies in Eastern Washington Vineyards

Canopy spray application technology in specialty crops: a slowly evolving landscape

Effect of Emitter Modifications on Spray Performance of a Solid Set Canopy Delivery System in a High-Density Apple Orchard

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