Drift-Reducing Nozzle Effects on Herbicide Performance<sup>1</sup>

Ramsdale, Bradford K.; Messersmith, Calvin G.

doi:10.1614/0890-037x(2001)015[0453:drneoh]2.0.co;2

Cited by 65 publications

(58 citation statements)

References 15 publications

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“…When applied with the AI nozzle, Array, Border, and Placement increased the D V0.1 by 17 to 23 m. Although each DCA reduced driftable droplets when applied with the AI nozzle, this reduction did not translate to in-field differences of D L or D I distance, except with Border. Ramsdale and Messersmith (2001) found no differences in control of three bioassay species among DG, TT, AI, TD, and conventional TP nozzles, despite differences in the spray coverage on water-sensitive cards.…”

Section: Resultsmentioning

confidence: 68%

Glyphosate Spray Drift Management with Drift-Reducing Nozzles and Adjuvants

et al. 2006

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Field experiments were conducted to evaluate the effect of five spray-nozzle types and three drift-control adjuvants (DCA) on glyphosate spray drift. The extended-range (XR) flat-fan nozzle at 280 kPa was used as the standard comparison. DCAs were evaluated for drift reduction with the use of the XR and air-induction (AI) nozzles. Wind speed ranged from 1.3 to 9.4 m/s (3 to 21 mph). Lethal drift (DL) and injury drift (DI) were determined by downwind visual observation of grain sorghum response. Drift distances were measured from the spray swath edge. The Turbo FloodJet and AI nozzles reduced DLdistance by 34%. All four drift-reducing (DR) nozzles reduced DIdistance by 22 to 32%. Reducing the pressure of the XR flat-fan nozzle from 280 to 140 kPa did not reduce DLor DIdistance. When applied through AI nozzles, each DCA increased droplet volume diameter, one DCA reduced DIdistance and none reduced DLdistance when applied through XR tips. The DCAs did not affect DLor DIdistance.

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Section: Resultsmentioning

confidence: 68%

Glyphosate Spray Drift Management with Drift-Reducing Nozzles and Adjuvants

et al. 2006

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“…There was no effect of the water carrier volume with the FF nozzles, but the AI nozzles with the 100 L ha -1 rate improved the control of A. theophrasti (4%) and P. persicaria (8%).This is consistent with the results of Knoche (1994), who found that, with glyphosate, herbicidal performance increased as the carrier volume decreased. Ramsdale and Messersmith (2001) also indicated that glyphosate was equally or more effective in a 47 L ha -1 compared to a 190 L ha -1 spray volume. There was no effect of the spray pressure with the AI nozzles on weed control.…”

Section: Resultsmentioning

confidence: 91%

Flat fan and air induction nozzles affect soybean herbicide efficacy

Sikkema

Brown

Shropshire

et al. 2008

Weed Biology and Management

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Fifteen field experiments were conducted from 2002 to 2005 to determine the influence of the nozzle type, spray volume, spray pressure, and herbicide rate on herbicidal efficacy in soybean. There was no effect of the nozzle type on herbicidal efficacy with fomesafen, bentazon, glyphosate, and cloransulam-methyl when applied at the manufacturer's recommended rate. The control of Echinochloa crus-galli (barnyardgrass) with quizalofop-p-ethyl was improved when applied with flat fan (FF) nozzles compared with air induction (AI) nozzles.There was an increase in weed control with the FF nozzles compared with the AI nozzles in four of the 13 comparisons when the herbicides were applied at half the recommended rate, while in two situations, application with the AI nozzles resulted in improved weed control. With the FF nozzles, there was no effect of the water carrier volume on weed control with bentazon, glyphosate, and cloransulam-methyl. The control of Abutilon theophrasti (velvetleaf) and Chenopodium album (common lambsquarters) with fomesafen and E. crus-galli with quizalofop-pethyl was improved at the higher water carrier volume. With the AI nozzles, the control of A. theophrasti and Ambrosia artemisiifolia (common ragweed) with fomesafen and E. crus-galli with quizalofop-p-ethyl was improved at the higher water carrier volume, while the control of A. theophrasti and Polygonum persicaria (ladysthumb) was improved with glyphosate at the lower water carrier volume. With the AI nozzles, the control of C. album with bentazon and E. crus-galli with quizalofop-p-ethyl was improved at the higher spray pressure. There was no effect of the nozzle type on the soybean yield with glyphosate, cloransulam-methyl, and quizalofop-p-ethyl.The use of the FF nozzles compared with the AI nozzles to apply fomesafen and bentazon increased the soybean yield by 6 and 7%, respectively. Based on this study, the optimum nozzle type, water carrier volume, and spray pressure is herbicide-and weed species-specific.

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“…Derivas acidentais durante a aplicação têm potencial para provocar danos em cultivos no sistema de semeadura direta (Hemphill Jr. & Montgomery, 1981;Gelmini, 1988;Ramsdale & Messersmith, 2001;Banks & Schroeder, 2002;Lyon et al, 2003b) e no algodoeiro Lyon et al, 2003a;Miller et al, 2004), fazendo-se necessário gerar informações para a caracterização e quantificação desses efeitos. Também, a possibilidade de uso de cultivares de algodão, soja e milho geneticamente modificados para resistência ao herbicida glyphosate deverá aumentar o potencial de deriva desse produto para culturas/cultivares sensíveis.…”

Section: Introductionunclassified