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1. Field evaluation of a deep learning-based smart variable-rate sprayer for targeted application of agrochemicals

Author:
Aitazaz A. Farooque; Nazar Hussain; Arnold W. Schumann; Farhat Abbas; Hassan Afzaal; Andrew McKenzie-Gopsill; Travis Esau; Qamar Zaman; Xander Wang
Source:
Smart agricultural technology 2023 v.3 pp. 100073
ISSN:
2772-3755
Subject:
spray volume,   etc   ; Alternaria solani; Chenopodium album; Solanum tuberosum; Spergula arvensis; agrochemicals; blight; corn; environmental stewardship; farms; liquids; plant protection; potatoes; sprayers; weeds;     Show all 15 Subjects
Abstract:
... The field performance of a newly developed novel smart variable-rate sprayer was evaluated. The sprayer uses convolutional neural networks (CNNs) for target detection and spot-applications of agrochemicals within potato (Solanum tuberosum L.) fields attacked by lamb's quarters (Chenopodium album L.) and corn spurry (Spergula arvensis L.) weeds and the early blight potato disease caused by Alternar ...
DOI:
10.1016/j.atech.2022.100073

2. Harnessing the full potential of low-dose high-potency (LDHP) herbicide molecules by standardized spraying technique in rice and wheat

Author:
C.R. Chethan; R.P. Dubey; Subhash Chander; Deepak V. Pawar; Dibakar Ghosh; P.K. Singh
Source:
Indian journal of weed science 2022 v.54 no.2 pp. 146-150
ISSN:
0974-8164
Subject:
spray volume,   etc   ; field capacity; field experimentation; metsulfuron; profitability; rice; weed control; wheat;     Show all 8 Subjects
Abstract:
... Efficient and effective methods of weed control are needed to ensure higher crop productivity and profitability. Herbicides use is becoming popular amongst farmers because of ease, efficiency and lesser cost involved. The efficacy of herbicide depends on the proper spraying technique. Recently, the new generation effective low-dose high-potency (LDHP) herbicide molecules are being introduced but t ...
DOI:
10.5958/0974-8164.2022.00028.4

3. Effects of application rate on spray deposition, stink bug control, and yield in soybean crops

Author:
José L. C. Santos-Júnior; Carlos G. Raetano; Fernando K. de Carvalho; Pedro J. Ferreira-Filho; Júlio C. Guerreiro; Samuel Ferrari; Vagner Nascimento; Rafael S. Tomaz; Agatha S. Argioli; Evandro P. Prado
Source:
Phytoparasitica 2022 v.50 no.1 pp. 191-200
ISSN:
0334-2123
Subject:
spray volume,   etc   ; Pentatomidae; application rate; canopy; dyes; insecticide application; insecticides; soybeans; spray deposition;     Show all 9 Subjects
Abstract:
... Stink bugs are economically important pests in soybean crops, affecting yield as well as the physiological and sanitary quality of grains or seeds. The present study aimed to assess the spray deposition into soybean canopy, stink bug control, and soybean yield as affected by insecticide application rate. Field experiments were carried out evaluating the variations of 60, 110, 160 and 210 L ha⁻¹ ap ...
DOI:
10.1007/s12600-021-00954-4

4. Assessing the application of spot spray in Nanguo pear orchards: Effect of nozzle type, spray volume rate and adjuvant

Author:
Shuang Guo; Weixiang Yao; Tongyu Xu; Hui Ma; Mujun Sun; Chunling Chen; Yubin Lan
Source:
Pest management science 2022 v.78 no.8 pp. 3564-3575
ISSN:
1526-498X
Subject:
spray volume,   etc   ; adjuvants; droplet size; orchards; pears; pesticide application; risk; spot spraying; spray deposition; surfactants;     Show all 10 Subjects
Abstract:
... BACKGROUND: Aerial spray is one of the most important applications of unmanned aerial vehicles (UAVs) in agriculture. This work aimed to promote the use of UAVs as an alternative to knapsack electric sprayers in pesticide application in Nanguo pear orchards planted in mountain terraced orchard scenarios. The spray deposition of four types of nozzles (SX110015, XR80015, IDK90015 and TR80015), two s ...
DOI:
10.1002/ps.6999

5. Droplet deposition and pest control efficacy on pine trees from aerial application

Author:
Weixiang Yao; Shuang Guo; Juan Wang; Chunling Chen; Fenghua Yu; Xiang Li; Tongyu Xu; Yubin Lan
Source:
Pest management science 2022 v.78 no.8 pp. 3324-3336
ISSN:
1526-498X
Subject:
spray volume,   etc   ; Pinus koraiensis; Pinus massoniana; aerial application; aircraft; droplets; flight; pest control; pests; wind tunnels;     Show all 10 Subjects
Abstract:
... BACKGROUND: Aerial application, a spraying method with aircraft as the application platform, is one of the most important methods of pest control in pine forests. This work aimed to investigate the movement and distribution patterns of droplets and the pest control effectiveness of helicopter spraying on Masson pine (MP) and Korean pine (KP) trees. In particular, three nozzle types (CP02, CP03 and ...
DOI:
10.1002/ps.6959

6. Better Droplet Deposition and Internode Shortening Effects of Plant Growth Regulator EDAH on Maize Applied by Small Unmanned Aerial Vehicle Than Electric Knapsack Sprayer

Author:
Zhao Wang; Mujahid Hussain; Guanmin Huang; Jiaming Yin; Yuling Guo; You Mo; Liusheng Duan; Zhaohu Li; Weiming Tan
Source:
Agriculture (Basel) 2022 v.12 no.3 pp. -
ISSN:
2077-0472
Subject:
spray volume,   etc   ; Zea mays; agriculture; corn; droplets; ethephon; plant growth substances; spray deposition; unmanned aerial vehicles; yields;     Show all 10 Subjects
Abstract:
... Maize (Zea mays L.) lodging is an important factor limiting its yield increase worldwide. EDAH (containing 27% ethephon and 3% DA-6) is commonly used to decrease lodging. There is an urgent need to select efficient application methods of agrochemical for better spray deposition. In our research, an unmanned aerial vehicle (UAV) (15 L ha⁻¹ and 30 L ha⁻¹) with EDAH dosages of 72 and 90 g a.i. ha⁻¹, ...
DOI:
10.3390/agriculture12030404

7. Slightly acidic electrolyzed water as an alternative disinfection technique for hatching eggs

Author:
Chang Liu; Weichao Zheng; Zonggang Li; Ling Zhou; Yuxuan Sun; Shengqiang Han
Source:
Poultry science 2022 v.101 no.3 pp. 101643
ISSN:
0032-5791
Subject:
spray volume,   etc   ; chicks; chlorine; disinfectants; disinfection; egg shell; egg shell quality; eggs; electrolyzed water; embryonic mortality; growth performance; pullets; toxicity;     Show all 13 Subjects
Abstract:
... Conventional chemical disinfectants used for egg disinfection could result in toxic residue and endanger hatchability, chick quality, and pullet growth performance. Slightly acidic electrolyzed water (SAEW) is known as a novel disinfectant for egg sterilization due to its high efficiency and no residue. In this study, a comprehensive assessment of slightly acidic electrolyzed water and benzalkoniu ...
DOI:
10.1016/j.psj.2021.101643

8. Comparison of a new knapsack mist sprayer and three traditional sprayers for pesticide application in plastic tunnel greenhouse

Author:
Shilin Wang; Xue Li; Yajia Liu; Xiaolan Lv; Wei Zheng
Source:
Phytoparasitica 2022 v.50 no.1 pp. 177-190
ISSN:
0334-2123
Subject:
spray volume,   etc   ; air flow; canopy; disease control; droplets; foggers; greenhouses; humidity; labor; liquids; mists; pesticide application; pests; plant protection; sprayers; temperature; tomatoes; wind speed;     Show all 18 Subjects
Abstract:
... The environmental conditions of facility vegetables are characterized by high temperature and humidity, promoting a high incidence of pests and diseases. To change the backward status of plant protection machinery in greenhouses, a new kind of knapsack mist sprayer (KMS) was designed. The sprayer can reach a maximum wind speed of 12 m/s near the air-flow outlet, the spraying range is 9 m, and the ...
DOI:
10.1007/s12600-021-00947-3

9. Spray Atomization and Links to Flame Stability over a Range of Weber Numbers and Pressure Ratios

Author:
G. Singh; K. Jayanandan; A. Kourmatzis; A. R. Masri
Source:
Energy & fuels 2021 v.35 no.19 pp. 16115-16127
ISSN:
1520-5029
Subject:
spray volume,   etc   ; atomization; droplet size; energy; momentum;     Show all 5 Subjects
Abstract:
... This paper presents an assessment of flame stability and spray characteristics over a wide range of Weber numbers and dynamic pressure ratios (or momentum flux ratios) using the Sydney needle burner (SYNSBURN) which employs air-blast atomization. Several fuels and needle sizes are used to study flows spanning equivalence ratios of 0.6 to 3.2, Weber numbers of 150 to 1050, and dynamic pressure rati ...
DOI:
10.1021/acs.energyfuels.1c02273

10. Droplet Size Distributions from Hollow-Cone Nozzles Coupled with PWM Valves

Author:
Ramón Salcedo; Heping Zhu; Hongyoung Jeon; Erdal Ozkan; Zhiming Wei; Emilio Gil; Javier Campos; Carla Román
Source:
Journal of the ASABE v.65 no.4 pp. 695-706
ISSN:
2769-3287
Subject:
spray volume,   etc   ; agrochemicals; atomization; droplet size; droplets; orchards; precision agriculture; sprayers;     Show all 8 Subjects
Abstract:
... HighlightsVolumetric diameters DV0.1, DV0.5, and DV0.9 for PWM-controlled hollow-cone nozzles were investigated.Droplet sizes were influenced greatly by nozzle size, operating pressure, duty cycle, and slightly by PWM valve type.Volume fractions were reported for droplets smaller than 100 µm, between 100 and 300 µm, and greater than 300 µm.Measured droplet sizes were classified as different catego ...
DOI:
10.13031/ja.15064

11. Evaluation of Horizontal Patternators According to International Standard Requirements for Boom Sprayers

Author:
Emilio Gil; Mariana Bueno; Javier Campos; Montserrat Gallart; Joao P. A. R. Da Cunha
Source:
Transactions of the ASABE v.64 no.5 pp. 1635-1646
ISSN:
2151-0032
Subject:
spray volume,   etc   ; height; liquids; measurement; nozzles; pressure; spray booms; sprayers; testing;     Show all 9 Subjects
Abstract:
... HighlightsHorizontal distribution according ISO Standard 16119 is a measurement procedure to evaluate boom sprayers.ISO Standards 5682-1 and 5682-2 establish technical requirements for horizontal patternators.In this study, three types of patternators were evaluated to test their capability to meet the standards.The evaluated patternators showed similar results for spray distribution patterns.Mino ...
DOI:
10.13031/trans.14086

12. Comparison of Droplet Deposition, 28-Homobrassinolide Dosage Efficacy and Working Efficiency of the Unmanned Aerial Vehicle and Knapsack Manual Sprayer in the Maize Field

Author:
Mujahid Hussain; Zhao Wang; Guanmin Huang; You Mo; Rehana Kaousar; Liusheng Duan; Weiming Tan
Source:
Agronomy 2022 v.12 no.2 pp. -
ISSN:
2073-4395
Subject:
spray volume,   etc   ; agronomy; corn; droplets; photosynthesis; plant hormones; sprayers; unmanned aerial vehicles;     Show all 8 Subjects
Abstract:
... Brassinolides (BRs) are naturally-occurring phytohormones, which are essentially important to improve the crop adoptive capacity to various stresses. Spray volume (SV) and agrochemical application methods are associated with chemical deposition and field efficiency. The objective of this study was to compare the possible effects of 28-Homobrassinolide (HBL) dosages 18, 22, and 30 mg a.i. ha⁻¹ for ...
DOI:
10.3390/agronomy12020385

13. Droplet distributions in cotton harvest aid applications vary with the interactions among the unmanned aerial vehicle spraying parameters

Author:
Pengchao Chen; Fan Ouyang; Guobin Wang; Haixia Qi; Weicheng Xu; Weiguang Yang; Yali Zhang; Yubin Lan
Source:
Industrial crops and products 2021 v.163 pp. 113324
ISSN:
0926-6690
Subject:
spray volume,   etc   ; canopy; cotton; defoliation; droplet size; droplets; flight; unmanned aerial vehicles;     Show all 8 Subjects
Abstract:
... A common problem of unmanned aerial vehicles (UAVs) spraying is that fewer droplets could reach the lower layer, and the depositions among the spray width show a significant difference. However, ensuring the penetration and uniformity of the spray is particularly important in the cotton harvest aid applications. As a new spraying method, poor droplet penetration and uniformity of droplet distribut ...
DOI:
10.1016/j.indcrop.2021.113324

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

Author:
Brent W Warneke; Heping Zhu; Jay W Pscheidt; Lloyd L Nackley
Source:
Pest management science 2021 v.77 no.5 pp. 2157-2164
ISSN:
1526-498X
Subject:
spray volume,   etc   ; air; canopy; farm labor; landscapes; pesticide application; pesticides; risk; specialty crops; sprayers;     Show all 10 Subjects
Abstract:
... 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 an ...
DOI:
10.1002/ps.6167

15. Impact of the equilibrium relationship between deposition and wettability behavior on the high‐efficiency utilization of pesticides

Author:
Lifei He; Lei Ding; Peng Zhang; Beixing Li; Wei Mu; Feng Liu
Source:
Pest management science 2021 v.77 no.5 pp. 2485-2493
ISSN:
1526-498X
Subject:
spray volume,   etc   ; ammonium; cucumbers; hexaconazole; hydrophobicity; leaves; liquids; powdery mildew; surface tension; surfactants; wettability;     Show all 11 Subjects
Abstract:
... BACKGROUND: Often, due to the occurrence of powdery mildew, cucumber leaf surfaces is changed into a more hydrophobic surface, which affects wetting and spreading of liquid pesticides, reducing their efficiency. The wetting and deposition behavior of liquid pesticides can be improved by adding surfactants to pesticides. Added surfactants affect the spray volume of the pesticide, which can lead to ...
DOI:
10.1002/ps.6279

16. Evaluation of droplet deposition and efficiency of 28-homobrassinolide sprayed with unmanned aerial spraying system and electric air-pressure knapsack sprayer over wheat field

Author:
Mujahid Hussain; Zhao Wang; Guanmin Huang; You Mo; Yuling Guo; Rehana Kaousar; Liusheng Duan; Weiming Tan
Source:
Computers and electronics in agriculture 2022 v.202 pp. 107353
ISSN:
0168-1699
Subject:
spray volume,   etc   ; agriculture; biomass; droplets; electronics; flowering; grain yield; photosynthesis; plant growth; sprayers; stress tolerance; wheat;     Show all 12 Subjects
Abstract:
... Brassinolides are plant-specific Polyhydroxylated steroid hormones that play a vital role in plant growth regulation and actively participate in inducing various stress tolerance. Our objective was to investigate the influence of 28-Homobrassinolide (HBR) dosages and compare the droplet deposition of unmanned aerial spraying system (UASS) with electric air-pressure knapsack (EAP) sprayer over the ...
DOI:
10.1016/j.compag.2022.107353

17. Spray mixture volume in the control of Asian soybean rust

Author:
Roxana S.M. Nascimento; Lino R. Ferreira; Laércio Zambolim; Douglas F. Parreira; Yanna K.S. da Costa; Jossimara F. Damascena; Paulo R. Cecon
Source:
Crop protection 2021 v.146 pp. 105662
ISSN:
0261-2194
Subject:
spray volume,   etc   ; Phakopsora pachyrhizi; fungi; fungicide application; leaves; plant protection; soybean rust; soybeans; spray coverage; trifloxystrobin; Brazil;     Show all 11 Subjects
Abstract:
... While soybean is one of the main crops produced in Brazil, it can have severe losses of production due to the incidence of Asian rust caused by the fungus Phakopsora pachyrhizi. Fungicide application is the main method of rust control. In order to reduce application costs, there has been a trend to reduce spray volumes. The purpose of this study was to evaluate the effectiveness of applying the co ...
DOI:
10.1016/j.cropro.2021.105662

18. Variable-rate Spray Technology Optimizes Pesticide Application by Adjusting for Seasonal Shifts in Deciduous Perennial Crops

Author:
Lloyd L. Nackley; Brent Warneke; Lauren Fessler; Jay W. Pscheidt; David Lockwood; Wesley C. Wright; Xiaocun Sun; Amy Fulcher
Source:
HortTechnology 2021 v.31 no.4 pp. 479-489
ISSN:
1943-7714
Subject:
spray volume,   etc   ; Malus domestica; Vitis vinifera; apples; canopy; grapes; orchards; pesticide application; pesticides; spray coverage; sprayers; vineyards;     Show all 12 Subjects
Abstract:
... To optimize pesticide applications to the canopies of deciduous perennial crops, spray volume should be adjusted throughout the year to match the changes in canopy volume and density. Machine-vision, computer-controlled, variable-rate sprayers are now commercially available and claim to provide adequate coverage with decreased spray volumes compared with constant-rate sprayers. However, there is l ...
DOI:
10.21273/HORTTECH04794-21

19. Determining application volume of unmanned aerial spraying systems for cotton defoliation using remote sensing images

Author:
Pengchao Chen; Weicheng Xu; Yilong Zhan; Guobin Wang; Weiguang Yang; Yubin Lan
Source:
Computers and electronics in agriculture 2022 v.196 pp. 106912
ISSN:
0168-1699
Subject:
spray volume,   etc   ; Bayesian theory; agriculture; algorithms; application rate; automation; canopy; cotton; decision support systems; defoliants; defoliation; droplets; electronics; markets; models;     Show all 15 Subjects
Abstract:
... The Unmanned aerial spraying systems (UASS), with a precise positioning system and convenient control system, have attracted more attention from researchers and the market. However, the UASS operation parameter setting still depends on the operator, and there is still a gap between the intelligent spraying. The upgrade of UASS from automation to intelligence requires a “scientific brain” to make s ...
DOI:
10.1016/j.compag.2022.106912

20. Influence of spraying tips on the efficiency of chemical control of soybean rust

Author:
Roxana S.M. Nascimento; Lino R. Ferreira; Laércio Zambolim; Douglas F. Parreira; Pedro L.de S. Oliveira; Rafael G.S. Moraes
Source:
Crop protection 2022 v.160 pp. 106031
ISSN:
0261-2194
Subject:
spray volume,   etc   ; chemical control; disease severity; fungicide application; leaves; phenology; plant protection; sanitary and phytosanitary regulations; soybean rust; soybeans; spray deposition; trifloxystrobin;     Show all 12 Subjects
Abstract:
... Asian rust is responsible for significant reductions in soybean yield. The application of fungicide is the main method of control of this disease, and to maintain the efficiency of phytosanitary treatment it is necessary to know several features of the application technology. Spray tips are fundamental for the quality of phytosanitary products application and exert a direct influence on spraying e ...
DOI:
10.1016/j.cropro.2022.106031