Effect of emitter type and mounting configuration on spray coverage for solid set canopy delivery system

Sharda, Ajay; Karkee, Manoj; Zhang, Qin; Ewlanow, Igor; Adameit, Ute; Brunner, Jay F.

doi:10.1016/j.compag.2014.07.012

Cited by 26 publications

(22 citation statements)

References 7 publications

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“…Understanding how the SSCDS works in large, orchard size plantings would be the next logical question to ask. So far, most recent research has focused on optimizing emitter style, orientation, spacing, and the mechanics of spray delivery . Since the current research was conducted in pairs of rows with an SSCDS installed, pest management and spray coverage levels might be improved when the sampled area is completely surrounded by a microsprayer array covering a square instead of linear block.…”

Section: Discussionmentioning

confidence: 99%

“…Preliminary studies on pest management efficacy of the system showed promise, the prototype SSCDS had equivalent insect and disease control to an air blast sprayer, with no significant differences in foliar terminal or fruit damage attributable to the treated time frame . Recent work has focused on preliminary coverage measurements, fluid dynamics and appropriate piping materials, and emitter configuration and style . The potential of the system for evaporative cooling was evaluated in Washington, where high temperatures and sunburn can damage fruit, with promising results .…”

Section: Introductionmentioning

confidence: 99%

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Spray coverage and pest management efficacy of a solid set canopy delivery system in high density apples

Owen-Smith

Perry

Wise

et al. 2019

Pest Management Science

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BACKGROUND: Air blast sprayers are not optimized for spraying the short statured trees in modern apple orchards, resulting in off target drift and variable coverage. A solid set canopy delivery system (SSCDS) consisting of a microsprayer array distributed throughout the orchard was investigated as a replacement agrochemical application method in this study. SSCDS's have the potential to optimize coverage, rapidly spray applications, and remove the operator and tractor from the orchard. RESULTS: Air blast and SSCDS applications were compared using water sensitive paper, bioassays, and pest damage assessments. Pest management and coverage were compared using application volumes of 700 and 795 L ha −1 , respectively. In 2013, adaxial coverage measurements showed no difference between the treatments, but air blast sprayers had higher coverage levels on the abaxial surfaces. There were no significant differences in coverage in 2014. Bioassays using Choristoneura rosaceana fed on leaf discs treated by the SSCDS displayed 95.8% mortality in 2013 and 94.2% mortality in 2014, and air blast treated larval mortality was 95% in 2013 and 100% in 2014. Damage evaluations in both years generally showed no significant differences between the air blast plots and the SSCDS plots, but significant differences between the treated plots and untreated control. CONCLUSIONS: The prototype SSCDS was an effective pest management tool in high density apples, and offered a number of advantages over an air blast. Further engineering and research into coverage optimization would offer producers a novel tool for foliar agrochemical applications.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spray coverage and pest management efficacy of a solid set canopy delivery system in high density apples

Owen-Smith

Perry

Wise

et al. 2019

Pest Management Science

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“…If the mist being sprayed from the nozzle cannot make it to the tree bud, then cooling cannot occur. A high wire installation may not be feasible in windy areas, and it would be recommended to place the nozzle closer to the tree [24,25]. Additionally, node failure is a very common problem in WSN.…”

Section: Discussionmentioning

confidence: 99%

Voice-Controlled and Wireless Solid Set Canopy Delivery (VCW-SSCD) System for Mist-Cooling

et al. 2018

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California growers in the San Joaquin Valley believe that climate change will affect the pistachio yield dramatically. As the central valley fog disappears, insufficient dormant chill accumulation results in poor flowering synchrony, flower quality, and fruit set in this dioecious species. We have developed a novel, user-friendly, and low-cost Voice-Controlled Wireless Solid Set Canopy Delivery (VCW-SSCD) system to increase bud chill accumulation with evaporative cooling on sunny (winter) days. This system includes: (i) an automated solid-state canopy delivery (SSCD) system; (ii) a wireless weather-, crop-related data acquisition system; (iii) a Voice-Controlled (VC) system using Amazon Alexa; (iv) a mobile application to visualize the collected data and wirelessly control the SSCD system; and (v) a smart control system. The proposed system was deployed and evaluated in a commercial pistachio orchard in Bakersfield, CA. The system worked well with no reported errors. Results demonstrated the system's ability to cool bud temperatures in a low relative humidity climate. At an ambient temperature of 10-20 • C, bud temperatures were lowered 5-10 • C.

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“…More recent research by Agnello and Landers [7] evaluated an SSCDS composed of a large number of low-cost plastic micro-sprinklers and pressure gated valves. This proof of concept has been expanded on by Sharda et al, and Owen-Smith et al, with results suggesting that a SSCDS could replace airblast spray application in high-density orchards [8,9,10].…”

Section: Introductionmentioning

confidence: 99%

Season Long Pest Management Efficacy and Spray Characteristics of a Solid Set Canopy Delivery System in High Density Apples

Owen-Smith

Wise

Grieshop

2019

Insects

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Solid set canopy delivery systems (SSCDS) are a novel foliar agrochemical delivery system designed as an alternative for airblast sprayers in high density fruit production. This study tested the pest management potential, coverage, and chemical deposition of an SSCDS using commercially available microsprinkler components over the course of a growing season. Spray coverage and deposition for a representative airblast sprayer and SSCDS were evaluated using water sensitive paper and tartrazine dye, respectively. Foliar sprays for pest suppression were applied through both systems, and damage assessments were taken at the midpoint and end of the growing season. SSCDS sprays demonstrated similar levels of coverage on the adaxial leaf surface as airblast sprays, but significantly lower coverage on the abaxial surface. However, mean levels of foliar chemical deposition was generally higher in the SSCDS. Evaluations found minimal arthropod and fungal damage in both airblast and SSCDS treated plots compared to untreated trees. The SSCDS was shown to be a viable alternative to the airblast, with inherent advantages such as rapid application time and improved worker safety. Furthermore, higher deposition on SSCDS treated foliage supports the hypothesis that SSCDS provide a higher droplet capture rate in the canopy, with less off-target loss and drift than airblast sprayers.

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Effect of emitter type and mounting configuration on spray coverage for solid set canopy delivery system

Cited by 26 publications

References 7 publications

Spray coverage and pest management efficacy of a solid set canopy delivery system in high density apples

Spray coverage and pest management efficacy of a solid set canopy delivery system in high density apples

Voice-Controlled and Wireless Solid Set Canopy Delivery (VCW-SSCD) System for Mist-Cooling

Season Long Pest Management Efficacy and Spray Characteristics of a Solid Set Canopy Delivery System in High Density Apples

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