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... 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 ...
sprayvolume, 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 ...
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
sprayvolume, 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 ...
sprayvolume, 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 ...
sprayvolume, 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 ...
... 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, ...
... 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 ...
sprayvolume, 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 ...
sprayvolume, 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 ...
sprayvolume, 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 ...
sprayvolume, 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 ...
sprayvolume, 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 ...
sprayvolume, 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 ...
sprayvolume, 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 ...
sprayvolume, 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 ...
... 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 ...
... 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 ...
... 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 ...
sprayvolume, 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 ...
sprayvolume, 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 ...