Deposition and efficiency of herbicide sprays in sugar beet with twin-fluid, low-drift and conventional hydraulic nozzles

Nordbo, Ebbe; Steensen, Jens K.; Kirknel, Erik

doi:10.1016/0261-2194(95)00006-8

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…Good to excellent weed control was observed with all treatments. Nordbo et al (1995) noted similar discrepancies when evaluating spray nozzles. These authors reported differences in spray deposition due to various spray nozzles, although this did not translate into differences in herbicide efficacy.…”

Section: Resultsmentioning

confidence: 85%

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Evaluating Drift Control Agents to Reduce Short Distance Movement and Effect on Herbicide Performance¹

VanGessel¹,

Johnson²

2005

Weed Technology

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Spray drift to unintended areas is more of a concern as applications of nonselective herbicides associated with herbicide-resistant crops and the proximity of residential land to agricultural land increase. This research evaluated the benefit of three commercial drift control agents for effectiveness in reducing drift in 19 to 24 km/h wind and their potential effect on weed control. The drift control agents were added to a spray mixture of glyphosate at 0.8 kg ae/ha applied in 140 L/ ha and applied with either flat-fan or flood nozzles. None of the drift control agents reduced drift compared with the spray mixture without drift control agent over a distance of 6 m, as measured by water-sensitive cards or grain sorghum bioassay, regardless of nozzle type used. In a separate study, drift control agents did not reduce the weed control of glyphosate or acifluorfen.

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Section: Resultsmentioning

confidence: 85%

“…der controlled settings are not always demonstrated under field conditions (Green and Foy 2000). Nordbo et al (1995) discussed lack of consistent results between studies examining spray drift reduction with low-drift nozzles. Drift control agents did not reduce the injury observed on grain sorghum ( Table 2).…”

Section: Resultsmentioning

confidence: 99%

Evaluating Drift Control Agents to Reduce Short Distance Movement and Effect on Herbicide Performance¹

VanGessel¹,

Johnson²

2005

Weed Technology

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“…Our research indicates that conventional sprayers, which some growers probably already own, may be able to achieve droplet coverage similar to that provided by bifluid or air-assisted spray systems; however, this research is based on short-season soybean that do not grow as tall or as bushy as longer-season soybean and may apply only to regions where short-season soybean is grown, such as the northern United States and Canada. Nordbo et al (1995), who found no increased benefit with bifluid nozzles, reported that conventional hydraulic nozzles provided similar spray deposition on white mustard (Sinapis alba L.) and greater deposition on oat (Avena sativa L.), compared with bifluid nozzles, and herbicidal weed control in sugar beet (Beta vulgaris L.) was similar with both nozzles. In laboratory trials, spray deposition on simulated plants was increased with air assistance compared with no air assistance over spray qualities varying from very fine to coarse (Nordbo 1992).…”

Section: Discussionmentioning

confidence: 93%

Evaluation of foliar fungicide application methods on soybean

Bradley

Chesrown

Hofman

2007

Canadian Journal of Plant Pathology

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A field trial was conducted at Fargo, North Dakota, in 2005 and 2006 to evaluate different fungicide application methods on soybean (Glycine max). Kromekote ® paper cards were placed in the upper and lower canopy of soybean plants, and tebuconazole fungicide mixed with a blue dye was sprayed with different application methods at the R5 developmental stage. The applications were made with a conventional sprayer with Turbo TeeJet ® 110015 flatfan nozzles at 276 kPa liquid pressure, a conventional sprayer with XR TeeJet ® 80015 flat-fan nozzles at 276 kPa liquid pressure, an AirJet ® bifluid nozzle spray system with liquid pressure at 276 kPa and air pressure at both 76 and 48 kPa, or an air-assisted spray system with liquid pressure at both 221 and 83 kPa. An untreated control was also included to evaluate the effect of tebuconazole on soybean yield. Dye-sensitive Kromekote paper cards were analyzed to determine the percent coverage and the volume median diameter (VMD) of the droplets. Significant (P ≤ 0.05) interactions between year and application method were detected, most likely resulting from differences in plant height and development between the years. Droplet coverage in the upper canopy did not differ in either year among the application methods. Most application methods provided similar droplet coverage in the lower canopy in 2005, but the conventional sprayer with XR TeeJet 80015 flat-fan nozzles provided the greatest coverage in the lower canopy in 2006. Correlation analysis indicated that droplet coverage in the lower canopy increased with increased VMD of the droplets in 2005 (R = 0.91), and that yield increased with increased fungicide coverage in 2006 (R = 0.85). Visible symptoms of foliar fungal diseases were not present in either year, and tebuconazole had no effect on soybean yield, compared with the untreated control in either year. Bradley et al.: soybean / fungicide application / comparison of methods 202 Résumé : En 2005 et 2006, un essai au champ fut mené à Fargo, Dakota du Nord, pour évaluer différentes méthodes d'application de fongicides sur le soja (Glycine max). Des cartes de papier Kromekotez furent placées aux niveaux supérieur et inférieur du couvert végétal du soja, et du fongicide tébuconazole, mélangé à un colorant bleu, fut pulvérisé selon différentes méthodes d'application au stade de développement R5. Les applications ont été effectuées avec un pulvérisateur traditionnel équipé de buses à jet plat Turbo TeeJetz 110015 à une pression du liquide de 276 kPa, un pulvérisateur traditionnel équipé de buses à jet plat XR TeeJetz 80015 à une pression du liquide de 276 kPa, un système de pulvérisation équipé de buses AirJetz à émulsions inverties multiphases à une pression du liquide de 276 kPa et une pression d'air de 76 et 48 kPa, ou un système de pulvérisation à air assisté à une pression du liquide de 221 et 83 kPa. Un témoin non traité fut aussi inclus pour évaluer l'effet du tébuconazole sur le rendement du soja. Les cartes de papier Kromekote sensible au colorant furent analysée...

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“…Therefore, they can also decrease the nonvertical spray droplet impact to the leaf surface. There has been already reported better performance for twin flat fan nozzle in contrast to single flat fan nozzle (Nordbo et al, 1995;Combellack et al, 1996;Vallet and Tinet, 2013;Aliverdi, 2018;Aliverdi and Zarei, 2020). They are recommended for application of low spray volumes at high driving speeds (Vallet and Tinet, 2013).…”

Section: Akbar Aliverdi Masoud Borgheimentioning

confidence: 97%

Spray Coverage and Biological Efficacy of Single, Twin Symmetrical, and Twin Asymmetrical Flat Fan Nozzles

Aliverdi

Borghei

2021

Acta Technologica Agriculturae

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Proper selection of nozzle type and spray volume is essential to optimize herbicide dose, reducing its adverse environmental effects. It has not been sufficiently evaluated which nozzle type (twin symmetrical flat fan nozzle or the twin asymmetrical one) is more efficient and whether pinoxaden application is more efficient at a low or high spray volume. The spray coverage of a single, twin symmetrical, and twin asymmetrical flat fan nozzles, each in the sizes of 110015, 11002, 110025, 11003, 11004, and 11005 on the moisture-sensitive papers (MSPs) was investigated. The biological efficacy of treatments using pinoxaden against wild oat was investigated. Unlike other nozzle types, the single flat fan nozzle could not cover MSP placed vertically behind the nozzle trajectory. Except for the latter, each nozzle type could cover the MSPs more efficiently with increase in nozzle size. Generally, the nozzles’ performance was twin symmetrical > single = twin asymmetrical flat fan nozzles. A larger nozzle size improved the coverage of MSPs but increased the effective dose (ED50; dose that gives a 50% reduction in dry weight), indicating a decrease in the efficacy of pinoxaden. Among all treatments, the lowest ED50 value was obtained by the twin symmetrical flat fan nozzle 110015 (5.2 g a.i. ha−1). The smaller, more concentrated droplets are required to achieve optimal pinoxaden efficacy against wild oat, which can be provided by a twin symmetrical flat fan nozzle with a smaller size.

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Deposition and efficiency of herbicide sprays in sugar beet with twin-fluid, low-drift and conventional hydraulic nozzles

Cited by 7 publications

References 2 publications

Evaluating Drift Control Agents to Reduce Short Distance Movement and Effect on Herbicide Performance¹

Evaluating Drift Control Agents to Reduce Short Distance Movement and Effect on Herbicide Performance¹

Evaluation of foliar fungicide application methods on soybean

Spray Coverage and Biological Efficacy of Single, Twin Symmetrical, and Twin Asymmetrical Flat Fan Nozzles

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Deposition and efficiency of herbicide sprays in sugar beet with twin-fluid, low-drift and conventional hydraulic nozzles

Cited by 7 publications

References 2 publications

Evaluating Drift Control Agents to Reduce Short Distance Movement and Effect on Herbicide Performance1

Evaluating Drift Control Agents to Reduce Short Distance Movement and Effect on Herbicide Performance1

Evaluation of foliar fungicide application methods on soybean

Spray Coverage and Biological Efficacy of Single, Twin Symmetrical, and Twin Asymmetrical Flat Fan Nozzles

Contact Info

Product

Resources

About

Evaluating Drift Control Agents to Reduce Short Distance Movement and Effect on Herbicide Performance¹

Evaluating Drift Control Agents to Reduce Short Distance Movement and Effect on Herbicide Performance¹