Spray Drift Reduction Technology Adjuvant Evaluation

Elsik, Curtis M.; Stridde, Howard M.; Schweiner, Tammy M.

doi:10.1520/stp152720120012

Cited by 2 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the impact of spray drift on honey bees has been a great concern worldwide 17 . The evaporation of water inside the droplets partly contributes to this drift 18 . Dispersing tiny granules can be engineered to mimic liquid spraying to partly address the challenge of spray drift, but traditional granules are not suitable for drone spraying because most are not spherical and individual granules have large volumes.…”

Section: Introductionmentioning

confidence: 99%

Broadcasting of tiny granules by drone to mimic liquid spraying for the control of fall armyworm (Spodoptera frugiperda)

Yan

Yuan

Chen

et al. 2021

Pest Management Science

View full text Add to dashboard Cite

BACKGROUND The fall armyworm (FAW), Spodoptera frugiperda (J. E. Smith), is an invasive pest. Maize is one of its preferred host plants. The traditional application of granules has been effective for the control of FAW. Nevertheless, the challenge is to develop an application method that is less labor‐intensive and also efficient. RESULTS Tiny granules in the size range of 0.38–0.55 mm were prepared by the centrifugal granulation method for drone application. The in‐swath distribution patterns of granules deposited on sticky tapes were similar to the distribution of aqueous droplets through drone spraying. In the range of 1.5–3.5 m, a relatively higher aircraft height of flight can provide a more uniform distribution pattern of deposited granules, but resulted in less deposit of tiny granules in the whorl of maize plants. Similarly, the deposit of granules in the whorl of maize plants significantly decreased when the flight speed increased from 4 to 6 m s−1. Granules gathered in the whorl accounted for 50.8–58.7% of total granules deposited in the maize canopy. The field experiment demonstrates granular formulations (containing 0.25% chlorantraniliprole + 0.15% emamectin benzoate, or higher concentrations) can provide better and longer duration of FAW control than the aqueous spray formulation at the whorl stage of maize plants. CONCLUSION Broadcasting of tiny granules by drone can provide better FAW control than liquid spray. The architecture of the maize plant and the downward airstream of the drone create favorable conditions for the deposition of granules in whorls. © 2021 Society of Chemical Industry.

show abstract

Section: Introductionmentioning

confidence: 99%

Broadcasting of tiny granules by drone to mimic liquid spraying for the control of fall armyworm (Spodoptera frugiperda)

Yan

Yuan

Chen

et al. 2021

Pest Management Science

View full text Add to dashboard Cite

show abstract

Diameter-Resolved Velocity Correction for Laser Diffraction Calibration and Wind Tunnel Measurement of Sprays

Fredericks¹

2020

Pesticide Formulation and Delivery Systems: 40th Volume, Formulation, Application and Adjuvant Innovation

View full text Add to dashboard Cite

In agricultural sprays, droplet size influences both the efficacy and drift potential for pesticide applications. The droplet size spectra of these sprays are commonly evaluated via laser diffraction (LD) measurements within a spray-classification wind tunnel. A recurring issue when performing these measurements is the validation of instrument performance. For performing calibration verification on the instrument, a polydisperse standard with a known distribution is preferred over a monodisperse standard as a proxy for the spray distributions to better represent the spray and therefore challenge the instrument transfer function. However, this can introduce dispersion-related bias error if not all diameter droplets are moving at the same velocity. Herein a method is developed that allows for calculating diameter-resolved correction factors from first principles, enabling the correction of the bias error associated with the dispersion of polydisperse standards. The correction factor is found from the diameter-resolved residence time within the measurement volume, which is calculated by simulating the acceleration of the droplet from the point of generation. Herein this method is applied to LD calibration with gravity-dispersed National Institute of Standards and Technology traceable glass microbeads, allowing for the successful recovery of the known distribution. This method enables LD users to easily verify LD measurements without relying on the instrument manufacturer or in cases in which the instrument manufacturer is unwilling to perform verification, such as through glass windows rather than open air. Additionally, the present method is expanded to predict diameter-resolved bias in LD measurements performed in spray-classification wind tunnels consisting of spray in a coflowing carrier gas in which the spray is not in velocity equilibrium with the gas flow.

show abstract

Spray Drift Reduction Technology Adjuvant Evaluation

Cited by 2 publications

References 5 publications

Broadcasting of tiny granules by drone to mimic liquid spraying for the control of fall armyworm (Spodoptera frugiperda)

Broadcasting of tiny granules by drone to mimic liquid spraying for the control of fall armyworm (Spodoptera frugiperda)

Diameter-Resolved Velocity Correction for Laser Diffraction Calibration and Wind Tunnel Measurement of Sprays

Contact Info

Product

Resources

About