Use of Electrostatics, Rotary Atomizers, and Vegetable Oils in Low-Volume Ground Application

Bode, L. E.; Butler, BJ; Wax, LM

doi:10.1520/stp32862s

Cited by 8 publications

(5 citation statements)

References 1 publication

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“…The appli cation of several diphenylether herbicides in paraffinic oil at a total volume of 9 L/ha increased the level of johnson grass control in soybeans compared to applications in water (5). Recent developments in herbicide application tech nology now make the application of herbicides in oil at 2 to 9 L/ha much more practical (7,17,18,23,26,27).…”

Section: Introductionmentioning

confidence: 99%

Spread of Paraffinic Oil on Leaf Surfaces of Johnsongrass (Sorghum halepense)

McWhorter¹,

Barrentine

1988

Weed sci.

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Paraffinic oil applied at 2.3, 4.7, and 9.3 L/ha to the surface of johnsongrass [Sorghum halepense(L.) Pers. # SORHA] leaves spread to provide complete coverage of the leaf surface. Soybean oil applied at the same volumes provided only 30 to 50% coverage of leaf surfaces. Water at 187 L/ha that contained 1.25% paraffinic oil adjuvant provided only about 30% coverage because spray droplets did not spread appreciably. Spread coefficients obtained when five different oil-soluble herbicides were applied to leaf surfaces in paraffinic oil were more than 100 times greater than when applied in water alone. Higher spread coefficients were obtained when paraffinic oil contained herbicides than when paraffinic oil was applied alone. Spread coefficients were also much greater for paraffinic oil alone than for soybean oil with or without herbicides. Stomata on johnsongrass leaves were distorted by paraffinic oil, suggesting that leaf surface wax was dissolved and this might be a mode of entry of herbicide into johnsongrass when applied in paraffinic oil. Stomata were unaffected by soybean oil or by water sprays that contained 1.25% soybean oil adjuvant or paraffinic oil adjuvant.

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Section: Introductionmentioning

confidence: 99%

Spread of Paraffinic Oil on Leaf Surfaces of Johnsongrass (Sorghum halepense)

McWhorter¹,

Barrentine

1988

Weed sci.

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“…This results in a reduced application efficiency because applicators and golf course superintendents can only cover a limited area per tank load. The use of ultra-low volume (ULV) technology has been documented in other cropping systems (Bode et al 1985) but is not widely in use with turfgrass.…”

Section: Introductionmentioning

confidence: 99%

Comparison of an ultra-low volume (ULV) sprayer against a conventional sprayer, for foliar fertiliser and fungicide applications in turfgrass

Ferguson¹,

Gaussoin²,

Eastin³

et al. 2016

Journal of Plant Protection Research

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Two field studies (I and II) at the University of Nebraska-Lincoln: John Seaton Anderson Turfgrass Research Facility near Mead, NE, USA, were conducted to determine if a new ultra-low volume (ULV) sprayer can apply foliar nutrient, growth regulator, and fungicide treatments, in a manner similar to that of a conventional sprayer. Treatments were applied over creeping bentgrass ‘L-93’ (Agrostis stolonifera L.) managed as a fairway at 561 l · ha−1and 47 l · ha−1with the conventional and ULV sprayer, respectfully. Data were collected for chlorophyll content with a chlorophyll meter, and for the normalised difference vegetation index (NDVI) with a turf colour meter. Each plot was harvested for biomass at 21 days after treatment. Study II compared the ULV sprayer and a conventional sprayer, for the control of brown patch (Rhizoctonia solani Kuhn) in creeping bentgrass. The treatments were propiconazole and azoxystrobin. Spray volume was 561 l · ha−1for the conventional sprayer, and 19 l · ha−1for the ULV sprayer. Statistical differences in turf quality or dry weight reductions between the conventional and ULV sprayer were not detected. Brown patch control was also similar between the two sprayers, but azoxystrobin provided better control than propiconazole. Even with a 30-fold decrease in application volume, the results indicated that the Kamterter ULV sprayer may be a useful and effective management option for foliar fertiliser and fungicide applications in turfgrass.

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“…Today's global concern over environmental issues has prompted increased research in developing technol ogies to reduce detrimental effects of pesticides on the environment (5). Ultralow-volume (ULV) 3 application is one such technology being investigated. Recent re search has shown that application of some herbicides in ULV may increase weed control, thereby permitting the use of reduced rates (2,10,11).…”

Section: Introductionmentioning

confidence: 99%

“…The conventional hydraulic systems depend on hy draulic pressure and orifice size to regulate the liquid flow rate and atomize the fluid. Herbicides are com monly applied in water at volumes of 94 to 187 L/ha; however, with reduced volume applications, orifices are so small that clogging often occurrs (3).…”

Section: Introductionmentioning

confidence: 99%

Spray Droplet Size for Water and Paraffinic Oil Applied at Ultralow Volume

Hanks¹,

McWhorter²

1993

Weed technol.

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Spray droplet size of water and paraffinic oil was affected by air pressure, nozzle type, and liquid flow rate when applied with an ultralow volume (ULV), air-assist sprayer. Volume median diameters of water were generally larger than oil at constant air pressure and liquid flow rate. Droplet size decreased as air pressure increased, but increased as liquid flow rate increased. Volume median diameters of water droplets ranged from 41 to 838μm and from 16 to 457μm with oil when atomized at air pressures ranging from 14 to 84 kPa. Relative spans ranged from 1.2 to 18.0 and 2.0 to 7.2 for water and oil, respectively.

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Use of Electrostatics, Rotary Atomizers, and Vegetable Oils in Low-Volume Ground Application

Cited by 8 publications

References 1 publication

Spread of Paraffinic Oil on Leaf Surfaces of Johnsongrass (Sorghum halepense)

Spread of Paraffinic Oil on Leaf Surfaces of Johnsongrass (Sorghum halepense)

Comparison of an ultra-low volume (ULV) sprayer against a conventional sprayer, for foliar fertiliser and fungicide applications in turfgrass

Spray Droplet Size for Water and Paraffinic Oil Applied at Ultralow Volume

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