Evaluation of Spray Coverage and Other Spraying Characteristics from Ground and Aerial Sprayers (Drones: UAVs) Used in a High-Density Planting Olive Grove in Greece

Gertsis, Athanasios; Karampekos, Leonidas

doi:10.1007/978-3-030-84156-0_13

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…To date, literature regarding UAAS practices among aquatic site applications remains limited; however, positive results have been documented when implementing UAAS for site-specific weed management over conventional broadcast herbicide applications in terrestrial sites (Hunter et al 2020). While studies do exist comparing the efficacy and efficiency of UAAS and standard backpack applications in terrestrial settings (Gertsis and Karampekos 2021; Hunter et al 2020; Martin et al 2020), none have directly correlated herbicide efficacy holding carrier volume constant. There remains a clear need to investigate the performance of herbicides delivered from UAAS to traditional ground-based applications made at low carrier volumes for aquatic weed management.…”

Section: Introductionmentioning

confidence: 99%

Low carrier volume herbicide trials and UAAS support management efforts of giant salvinia (Salvinia molesta): a case study

Howell

Haug

Everman

et al. 2023

Invasive plant sci. manag.

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Expanding the current aquatic herbicide portfolio, reducing total spray volumes, or remotely delivering herbicide using novel spray technologies could improve management opportunities targeting invasive aquatic plants, where options are more limited. However, research on giant salvinia [Salvinia molesta (D. S. Mitchell)] response to foliar herbicide applications at carrier volumes ≤ 140 L ha-1 is incomplete. Likewise, no data exists documenting S. molesta control with unoccupied aerial application systems (UAAS). Following the recent >100 ha incursion of S. molesta in Gapway Swamp, North Carolina, a case study was developed to provide guidance for ongoing management efforts. In total, three field trials evaluated registered aquatic and experimental herbicides using a 140 L ha-1 carrier volume. Select foliar applications from UAAS were also evaluated. Results at 8 weeks after treatment (8 WAT) indicated the experimental protoporphyrinogen oxidase inhibitor, PPO-699-01 (424 g a.i. ha-1), in combination with endothall dipotassium salt (2370 g a.e. ha-1) provided 78% visual control, whereas control when PPO-699-01 (212 g a.i. ha-1) was applied alone was lower at 35%. Evaluations also showed diquat (3136 g a.i. ha-1) alone, glyphosate (4539 g a.e. ha-1) alone, and metsulfuron-methyl (42 g a.i. ha-1) alone achieved 86 to 94% visual plant control at 8 WAT. Sequential foliar applications of diquat, flumioxazin (210 g a.i. ha-1), and carfentrazone (67 g a.i. ha-1) 6 wk following exposure to in-water fluridone treatments were no longer efficacious by 6 WAT due to plant regrowth. Carfentrazone applications made from a backpack sprayer displayed greater control than applications made with UAAS at 2 WAT deploying identical carrier volumes; however, neither application method provided effective control at 8 WAT. Additional field validation is needed to further guide management direction of S. molesta control using low carrier volume foliar applications.

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Section: Introductionmentioning

confidence: 99%

Low carrier volume herbicide trials and UAAS support management efforts of giant salvinia (Salvinia molesta): a case study

Howell

Haug

Everman

et al. 2023

Invasive plant sci. manag.

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“…However, they could be an ideal solution for targeted, low-volume applications providing the feasibility to cover hard to access areas. Moreover, the bait character of olive fruit fly spraying does not require full canopy coverage, making it ideal for UAV applications [17].…”

Section: Introductionmentioning

confidence: 99%

Cost Analysis of Using UAV Sprayers for Olive Fruit Fly Control

Cavalaris,

Tagarakis,

Kateris

et al. 2023

AgriEngineering

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Unmanned Aerial Vehicles (UAVs) are a novel up-and-coming technology with wide applicability and great potential to be used in agricultural systems for spraying applications. However, the cost-effectiveness of this application is still rather uncertain. The present study utilized actual data from field applications to analyze the critical components and parameters in the potential case of using UAV sprayers for the control of olive fruit flies in order to assess the operational costs. The results are compared with the costs of two traditional spraying methods: manual spaying by workers using backpack sprayers and manual spraying assisted by a tractor. The case of the olive fruit fly was selected because it involves costly, time consuming, and laborious manual spraying. Furthermore, the bait character of spraying in these applications does not require full canopy coverage, making it ideal for UAV applications. A parameterized computational model was developed to assess the costs of labor, capital spending, repair and maintenance, energy, licensees, fees and taxes, and storage for each of the three methods. In addition, the cost for surveillance was also accounted for with the UAV method. Consequently, a sensitivity analysis was performed to examine the impact of the most crucial parameters. The results showed that the cost of spraying with a UAV was 1.45 to 2 times higher than the traditional methods, mainly due to the high capital spending resulting from a low economic life. There are opportunities, however, of improving the economic performance, making it compatible to the traditional methods, by using a smaller UAV with longer lasting batteries and by expanding its annual use beyond the needs of olive fruit fly control.

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Evaluation of Spray Coverage and Other Spraying Characteristics from Ground and Aerial Sprayers (Drones: UAVs) Used in a High-Density Planting Olive Grove in Greece

Cited by 2 publications

References 14 publications

Low carrier volume herbicide trials and UAAS support management efforts of giant salvinia (Salvinia molesta): a case study

Low carrier volume herbicide trials and UAAS support management efforts of giant salvinia (Salvinia molesta): a case study

Cost Analysis of Using UAV Sprayers for Olive Fruit Fly Control

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