Spray formulation efficacy—holistic and futuristic perspectives

Zabkiewicz, J. A.

doi:10.1016/j.cropro.2005.08.019

Cited by 77 publications

(55 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The spray application and efficacy of foliar pesticides depends on four processes, namely the deposition, retention, uptake and translocation of the actives in the applied formulation (Zabkiewicz, 2007). The retention of most plant protection products on plant leaves is a key to their efficient use.…”

Section: Introductionmentioning

confidence: 99%

Spray droplet impaction outcomes for different plant species and spray formulations

et al. 2017

Self Cite

View full text Add to dashboard Cite

A track-sprayer combined with a high-speed camera were used to visualize and identify droplet impaction outcomes for three formulations (water, 0.1% LI 700® (lecithin, a mixture of soya oils, propionic acid and surfactants) in water and 0.1% Pulse® (non-ionic surfactant, trisiloxane ethoxylate) in water) on four plant species (bean (Vicia faba L.), avocado (Persea americana L.), barnyard grass (Echinochloa crus-galli L. P. Beauv.) and cabbage (Brassica oleracea L.)) selected to represent a wide range of leaf surface characters. Droplet sizes and velocities were measured by image analysis and a multiple hypothesis tracking algorithm. Impaction outcomes were categorized into adhesion, bounce, or shatter. The probability of each outcome was estimated from logistic regression models related to the dimensionless Weber number. This approach is in contrast to various deterministic threshold criteria for droplet bounce or shatter that have been used to model droplet impaction events on leaves. It also provides a simple visual and numerical presentation of the complexity of impaction processes, and the relative influence of leaf surface character versus formulation for droplets with different impaction energies.

show abstract

Section: Introductionmentioning

confidence: 99%

Spray droplet impaction outcomes for different plant species and spray formulations

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, mechanisms governing spray retention, which is the amount of sprayed product actually retained by plant leaves, are still misunderstood despite the growing interest of researchers. On their part, the losses occurring during droplet impact on leaves amount to 5 -92% of the off-target component load of a herbicide application (Zabkiewicz 2007). Miller et al (2012b), in a quest for a suitable nozzle to perform plant scale control for use in spot spraying applications, highlighted that the use of larger and faster droplets in the spray gave an additional component of selectivity: retention on the onion crop was reduced from 6.35 µl for the nozzle delivering the slower and smaller droplets to 0.87 µl for the bigger and faster ones, a 7.5:1 ratio, while retention on filter paper was only modified in a 2:1 ratio.…”

Section: Introductionmentioning

confidence: 99%

The effect of surface orientation on spray retention

2014

View full text Add to dashboard Cite

Research in precision spraying investigates the means to reduce the amount of herbicide applied by directing droplets more accurately towards the weeds. The trend in the development of spot spraying equipment is an increase of the spatial resolution and new actuators that are able to target very small areas. However, there is a lack of methods for assigning rates of herbicides relating target to optimal droplet features. A wide range of droplet impact angles occurs during the spray application process because of droplet trajectories and the variability of leaf orientation. In this study, laboratory experiments were conducted to highlight the effect of surface orientation on droplet impact outcomes (adhesion, rebound or splashing) on two very difficult-to-wet surfaces: an artificial surface with a regular roughness pattern and an excised black-grass leaf with an anisotropic roughness pattern. Measurements were performed for different surface orientations with a high-speed camera coupled with backlighting LED. Droplets of two formulations (distilled water and distilled water + a surfactant) were produced with a moving flat-fan hydraulic nozzle to obtain a wide range of droplet sizes and velocities, which were measured by image analysis. Increasing surface angle reduces surface area available for droplet capture. Droplet impact behaviors are then modified since surface tilt induces a tangential velocity component at impact and, consequently, a reduction of the normal component. Impact modifications have also been observed due to the anisotropic roughness pattern of a black-grass leaf.The integration of droplet-surface interaction information offers a significant way to further improve the precision spraying efficiency by considering the optimal droplet size, speed and ejection angle depending on the target surface and architecture.2

show abstract

“…In weed control, herbicide formulation is an important determinant of its active ingredient activity by building up its physicochemical properties (Zabkiewicz, et al 2007). Current research performances trends towards attainment of herbicide formulation characterized by better spray solution retention, spreading on the leaves surfaces and absorption by weeds -properties finally affecting herbicide effectiveness.…”

Section: Introductionmentioning

confidence: 99%

The influence of selected spraying parameters on two formulation of sulfonylurea herbicides effect

Kieloch¹,

Domaradzki²

2013

JCEA

View full text Add to dashboard Cite

The objective of this study was the evaluation of spray volume and nozzle type effect on different formulation (water dispersible granules -WG and oil dispersion -OD) of two sulfonylurea herbicides: the mixture iodosulfuron methyl sodium + amidosulfuron and iodosulfuron methyl sodium + mesosulfuron methyl efficacy. There were investigated three levels of spray volume (125 l*ha ) and two types of nozzle (extended range flat nozzle TeeJet XR 11003-VS and drift guard flat nozzle TeeJet DG 11003-VS). Each herbicide was used at recommended dose and reduced by half. Spray volume and nozzle type did not affect activity of the mixture iodosulfuron methyl sodium + amidosulfuron, but differentiated the efficacy of OD formulation of iodosulfuron methyl sodium + mesosulfuron methyl, when it was applied at lowered dose. As spray volume rose, herbicide efficacy decreased. Nozzle type influenced OD formulation of the mixture iodosulfuron methyl sodium + mesosulfuron methyl, independently on dose. Significantly weaker efficacy was obtained when drift guard nozzle was used.Keywords: dose, efficacy, formulation, spray volume, sulfonylurea herbicide, type of nozzle Streszczenie Celem badań była ocena wpływu wydatku cieczy uŜytkowej i rodzaju dysz opryskiwacza na róŜne formy uŜytkowe (granulat do sporządzania zawiesiny wodnej -WG i zawiesina olejowa do rozcieńczania wodą -OD) dwóch herbicydów sulfonylomocznikowych: mieszaniny jodosulfuron metylosodowy + amidosulfuron oraz mieszaniny jodosulfuron metylosodowego z mezosulfuronem metylowym. Oceniano trzy poziomy wydatku cieczy uŜytkowej (125 l*ha zastosowano w dawce zalecanej oraz obniŜonej o połowę. Wydatek cieczy uŜytkowej oraz rodzaj dysz opryskiwacza nie wpłynęły na działanie mieszaniny jodosulfuron metylosodowy + amidosulfuron. Wydatek cieczy uŜytkowej zróŜnicował skuteczność formy olejowej (OD) mieszaniny jodosulfuronu metylosodowego z mezosulfuronem metylu aplikowanego w dawce zredukowanej. Wraz ze wzrostem wydatku cieczy uŜytkowej, malała skuteczność herbicydu. Rodzaj dysz wpłynął na skuteczność działania formy OD powyŜszej mieszaniny, niezaleŜnie od dawki. Znacząco słabszą skuteczność osiągnięto, gdy zastosowano dyszę antyznoszeniową.Słowa kluczowe: dawka, forma uŜytkowa, herbicydy sulfonylomocznikowe, rodzaj dyszy, skuteczność, wydatek cieczy uŜytkowej Detailed abstract Skuteczność działania herbicydu jest wypadkową wielu czynników. O końcowym efekcie chwastobójczym zastosowanego środka w duŜym stopniu decyduje proces jego pobrania przez chwasty, od którego zaleŜy ilość substancji aktywnej zaabsorbowanej przez roślinę. Właściwy dobór parametrów technicznych opryskiwania oraz właściwości fizyko-chemiczne cieczy uŜytkowej wpływa na dokładność pokrycia opryskiwanych powierzchni i jej retencję, a tym samym ilość pobranego herbicydu.W ramach badań wykonano doświadczenia w warunkach kontrolowanych (szklarnia) nad oceną wpływu wydatku cieczy uŜytkowej i rodzaju dysz opryskiwacza na róŜne formy uŜytkowe (granulat do sporządzania zawiesiny wodnej -WG i zawiesina olejowa do ro...

show abstract

Spray formulation efficacy—holistic and futuristic perspectives

Cited by 77 publications

References 18 publications

Spray droplet impaction outcomes for different plant species and spray formulations

Spray droplet impaction outcomes for different plant species and spray formulations

The effect of surface orientation on spray retention

The influence of selected spraying parameters on two formulation of sulfonylurea herbicides effect

Contact Info

Product

Resources

About