Application of variable spray technology in agriculture

Dou, Hongbin; Zhang, Chengliang; Li, Lei; Hao, Guangfa; Ding, Bofeng; Gong, Weike; Huang, Panlin

doi:10.1088/1755-1315/186/5/012007

Cited by 14 publications

(7 citation statements)

References 12 publications

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“…It works by adjusting the application parameters depending on the target characteristics to effectively reduce the amount of fluid used. [11][12][13] 13 However, most applications are conducted with infrared, ultrasonic, 14,15 LiDAR (Light detection and ranging), 16,17 and other detection technologies to collect and quantify the canopy volume and leaf area parameters to achieve accurate or variable application. Infrared and ultrasonic sensors are mostly used for target identification or rough measurement of canopy volume, thereby saving 20-40% of spray volume compared to traditional spraying.…”

Section: Introductionmentioning

confidence: 99%

“…To address this issue, variate rate air‐assisted spraying machinery is gaining popularity among orchard farmers. It works by adjusting the application parameters depending on the target characteristics to effectively reduce the amount of fluid used 11–13 . However, most applications are conducted with infrared, ultrasonic, 14,15 LiDAR (Light detection and ranging), 16,17 and other detection technologies to collect and quantify the canopy volume and leaf area parameters to achieve accurate or variable application.…”

Section: Introductionmentioning

confidence: 99%

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Variable rate air‐assisted spray based on real‐time disease spot identification

Zhang

Yin

Zhou

et al. 2022

Pest Management Science

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Background Currently, the variable‐rate application (VA) of agrochemicals on fruit trees is based on canopy volume and biomass. The canopy volume has a significant relationship with disease resistance and degree of disease incidence. Therefore, this study proposes a VA method that uses deep convolutional neural networks for real‐time recognition of disease spots on pear trees. Furthermore, it specifies the limitations and application scenarios of the disease spot recognition. Field performance tests were conducted to verify the performance of the proposed VA system. Results The results showed a mean average precision, precision, and recall of 87.42%, 83.76%, and 87.23%, respectively. The spot recognition rate was 81.3% when the canopy sampling distance, spot diameter, and canopy porosity were 1.2 m, 4–8 mm, and 55.76%, respectively. The results indicate that the proposed VA system saved 51.9% spray volume compared to conventional methods while ensuring quality. Conclusion Compared to the traditional constant rate model, the proposed VA technology based on real‐time disease spot identification can reduce spraying in nondiseased areas, thereby abandoning the previous saturation application practice and significantly reducing pesticide use. © 2022 Society of Chemical Industry.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Variable rate air‐assisted spray based on real‐time disease spot identification

Zhang

Yin

Zhou

et al. 2022

Pest Management Science

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“…Improving the effectiveness of pesticide application for controlling insects, mites, and pathogens in coffee cultivation is a major challenge for coffee farmers (Zampiroli et al, 2017). Indeed, even though a wide range of variable-rate technologies are available to crop farmers, this is not the case for tree crops (e.g., coffee; Dou et al, 2018). In Brazil, for example, there are only a few companies that manufacture air blast sprayers that can apply pesticides in coffee plantations, especially regarding spacing, and have sprayer frames (e.g., shafts, circuit tubing, connections, and spray nozzles) that can withstand the impact of the side branches of coffee trees.…”

Section: Introductionmentioning

confidence: 99%

Effect of air blast sprayer application speed on the dye retention of coffee leaves

et al. 2022

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Improving the effectiveness of pesticide application for controlling insects, mites, and pathogens in coffee cultivation has been a major challenge for coffee farmers, researchers, and consultants. The present study aimed to assess the deposition and distribution of a brilliant blue tracer in the coffee canopy using Jacto's Arbus 2000 Super Export EL and Kuhn's Twiter 2000 air blast sprayers at different application speeds (5 and 7 km h -1 ). The experiment was conducted using a randomized block design, with a 2 × 2 factorial arrangement (two sprayer models and two application speeds), with six replicates. After spraying, leaves were collected, and the deposition of the tracer was assessed using spectrophotometry.The canopy was divided into lower, middle, and upper heights, and subdivided into external and internal crown positions.The percentage difference in spray deposition between positions was termed relative spray deposition. Spray deposition in the internal crown differed only in the upper third section between sprayers. In the external crown, the application speed affected the deposition of tracer dye for both sprayers, whereas, in the internal crown, the application speed only affected the deposition of tracer dye in the upper crown section only when using the Arbus sprayer.

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“…Precise spraying in agriculture have been studied during this century [4,5]. Timely and accurate precise spraying in orchards and nurseries reduce pesticide residues, saving manpower and material resources [4].…”

Section: Introductionmentioning

confidence: 99%

Repellent Solution Precise Application to Cotton Clothes Surrounding Mango Trunk Trees to Avoid Ant Climbing

Hahn

2020

MCDA

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Leaf-cutting ants (Atta cephalotes) cause production losses to mango producers since they take down inflorescences and tender leaves. A repellent fluid was sprayed to an absorbent cloth placed around the tree-trunk to prevent ants from climbing. Eucalyptus oil-water emulsion was manually sprayed into the cotton fabric surrounding the tree trunks and the effect of fabric evaporation analyzed when it was covered or exposed directly to the environment. Manual application of the repellent solution is labour-intensive as each hectare has at least 100 trees. Precise spraying of hundreds of tree fabrics can be done with the orchard irrigation system. Relative humidity measurements were obtained every 3 hours comparing clothes moistened by drip or sprinkler irrigation systems, being the latter more homogeneous. Drippers together with tubing provide better cloth wetting, but the fabric should be thinner. Aroma was sampled by a group of experts and the oil-water emulsion should be applied every two days.

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Application of variable spray technology in agriculture

Cited by 14 publications

References 12 publications

Variable rate air‐assisted spray based on real‐time disease spot identification

Variable rate air‐assisted spray based on real‐time disease spot identification

Effect of air blast sprayer application speed on the dye retention of coffee leaves

Repellent Solution Precise Application to Cotton Clothes Surrounding Mango Trunk Trees to Avoid Ant Climbing

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