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Droplet Size Impact on Efficacy of a Dicamba-plus-Glyphosate Mixture

  • Thomas R. Butts (a1), Chase A. Samples (a2), Lucas X. Franca (a3), Darrin M. Dodds (a4), Daniel B. Reynolds (a5), Jason W. Adams (a6), Richard K. Zollinger (a7), Kirk A. Howatt (a8), Bradley K. Fritz (a9), Clint W. Hoffmann (a10), Joe D. Luck (a11) and Greg R. Kruger (a12)...

Abstract

Chemical weed control remains a widely used component of integrated weed management strategies because of its cost-effectiveness and rapid removal of crop pests. Additionally, dicamba-plus-glyphosate mixtures are a commonly recommended herbicide combination to combat herbicide resistance, specifically in recently commercially released dicamba-tolerant soybean and cotton. However, increased spray drift concerns and antagonistic interactions require that the application process be optimized to maximize biological efficacy while minimizing environmental contamination potential. Field research was conducted in 2016, 2017, and 2018 across three locations (Mississippi, Nebraska, and North Dakota) for a total of six site-years. The objectives were to characterize the efficacy of a range of droplet sizes [150 µm (Fine) to 900 µm (Ultra Coarse)] using a dicamba-plus-glyphosate mixture and to create novel weed management recommendations utilizing pulse-width modulation (PWM) sprayer technology. Results across pooled site-years indicated that a droplet size of 395 µm (Coarse) maximized weed mortality from a dicamba-plus-glyphosate mixture at 94 L ha–1. However, droplet size could be increased to 620 µm (Extremely Coarse) to maintain 90% of the maximum weed mortality while further mitigating particle drift potential. Although generalized droplet size recommendations could be created across site-years, optimum droplet sizes within each site-year varied considerably and may be dependent on weed species, geographic location, weather conditions, and herbicide resistance(s) present in the field. The precise, site-specific application of a dicamba-plus-glyphosate mixture using the results of this research will allow applicators to more effectively utilize PWM sprayers, reduce particle drift potential, maintain biological efficacy, and reduce the selection pressure for the evolution of herbicide-resistant weeds.

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Corresponding author

Author for correspondence: Thomas R. Butts, University of Arkansas System Division of Agriculture, 2001 Highway 70 E, Lonoke, AR 72086 USA. (Email: tbutts@uaex.edu)

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Cite this article: Butts TR, Samples CA, Franca LX, Dodds DM, Reynolds DB, Adams JW, Zollinger RK, Howatt KA, Fritz BK, Clint Hoffmann W, Luck JD, Kruger GR (2019) Droplet size impact on efficacy of a dicamba-plus-glyphosate mixture. Weed Technol 33:66–74. doi: 10.1017/wet.2018.118

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Alves, GS, Kruger, GR, da Cunha, JPAR, de Santana, DG, LAT, Pinto, Guimaraes, F, Zaric, M (2017a) Dicamba spray drift as influenced by wind speed and nozzle type. Weed Technol 31:724731
Alves, GS, Kruger, GR, da Cunha, JPAR, Vieira, BC, Henry, RS, Obradovic, A, Grujic, M (2017b) Spray drift from dicamba and glyphosate applications in a wind tunnel. Weed Technol 31:387395
Anglund, EA, Ayers, PD (2003) Field evaluation of response times for a variable rate (pressure-based and injection) liquid chemical applicator. Appl Eng Agric 19:273282
ASABE (2009) Spray Nozzle Classification by Droplet Spectra, ANSI/ASAE S572.2. St. Joseph, MI: American Society of Agricultural and Biological Engineers. 4 p
Bish, MD, Bradley, KW (2017) Survey of Missouri pesticide applicator practices, knowledge, and perceptions. Weed Technol 31:165177
Bueno, MR, da Cunha, JPAR, de Santana, DG (2017) Assessment of spray drift from pesticide applications in soybean crops. Biosyst Eng 154:3545
Butts, TR, Butts, LE, Luck, JD, Fritz, BK, Hoffmann, WC, Kruger, GR (2019a) Droplet size and nozzle tip pressure from a pulse-width modulation sprayer. Biosyst Eng 178:5269
Butts, TR, Luck, JD, Fritz, BK, Hoffmann, WC, Kruger, GR (2019b) Evaluation of spray pattern uniformity using three unique analyses as impacted by nozzle, pressure, and pulse-width modulation duty cycle. Pest Manag Sci, 10.1002/ps.5352
Butts, TR, Hoffmann, WC, Luck, JD, Kruger, GR (2018a) Droplet velocity from broadcast agricultural nozzles as influenced by pulse-width modulation. Pages 2452 in Fritz BK, Butts TR, eds. Pesticide Formulations and Delivery Systems: Innovative Application, Formulation, and Adjuvant Technologies, STP 1610. West Conshohocken, PA: ASTM International
Butts, TR, Samples, CA, Franca, LX, Dodds, DM, Reynolds, DB, Adams, JW, Zollinger, RK, Howatt, KA, Fritz, BK, Clint Hoffmann, W, Kruger, GR (2018b) Spray droplet size and carrier volume effect on dicamba and glufosinate efficacy. Pest Manag Sci 74:20202029
Capstan Ag Systems Inc. (2013) PinPoint Synchro Product Manual. Topeka, KS: Capstan Ag Systems. 112 p
Crawley, MJ (2013) The R Book. 2nd edn. Silwood Park, UK: John Wiley & Sons, Ltd. 1051 p
Creech, CF, Henry, RS, Fritz, BK, Kruger, GR (2015) Influence of herbicide active ingredient, nozzle type, orifice size, spray pressure, and carrier volume rate on spray droplet size characteristics. Weed Technol 29:298310
Creech, CF, Moraes, JG, Henry, RS, Luck, JD, Kruger, GR (2016) The impact of spray droplet size on the efficacy of 2,4-D, atrazine, chlorimuron-methyl, dicamba, glufosinate, and saflufenacil. Weed Technol 30:573586
Ebert, TA, Taylor, RAJ, Downer, RA, Hall, FR (1999) Deposit structure and efficacy of pesticide application. 1: Interactions between deposit size, toxicant concentration and deposit number. Pestic Sci 55:783792
Egan, JF, Barlow, KM, Mortensen, DA (2014) A meta-analysis on the effects of 2,4-D and dicamba drift on soybean and cotton. Weed Sci 62:193206
Ennis, WB, Williamson, RE (1963) Influence of droplet size on effectiveness of low-volume herbicidal sprays. Weeds 11:6772
Feng, PCC, Chiu, T, Sammons, RD, Ryerse, JS (2009) Droplet size affects glyphosate retention, absorption, and translocation in corn. Weed Sci 51:443448
Ferguson, JC, Chechetto, RG, Adkins, SW, Hewitt, AJ, Chauhan, BS, Kruger, GR, O’Donnell, CC (2018) Effect of spray droplet size on herbicide efficacy on four winter annual grasses. Crop Prot 112:118124
Forster, WA, Kimberley, MO, Zabkiewicz, JA (2005) A universal spray droplet adhesion model. T ASAE 48:13211330
Giles, DK, Comino, JA (1989) Variable flow control for pressure atomization nozzles. J Commercial Veh SAE Trans 98:237249
Giles, DK, Henderson, GW, Funk, K (1996) Digital control of flow rate and spray droplet size from agricultural nozzles for precision chemical application. Pages 729738 in Robert PC, Rust RH, Larson WE, eds. Precision Agriculture. Proceedings of the 3rd International Conference, Minneapolis, Minn., June 23–26, 1996. Madison, WI: American Society of Agronomy
GopalaPillai, S, Tian, L, Zheng, J (1999) Evaluation of a flow control system for site-specific herbicide applications. T ASAE 42:863870
Grisso, RD, Dickey, EC, Schulze, LD (1989) The cost of misapplication of herbicides. Appl Eng Agric 5:344347
Henry, RS, Kruger, GR, Fritz, BK, Hoffmann, WC, Bagley, WE (2014) Measuring the effect of spray plume angle on the accuracy of droplet size data. Pages 129138 in C Sesa, ed., Pesticide Formulations and Delivery Systems: Sustainability. Contributions from Formulation Technology, STP1569. West Conshohocken, PA: ASTM International
Jensen, PK, Jorgensen, LN, Kirknel, E (2001) Biological efficacy of herbicides and fungicides applied with low-drift and twin-fluid nozzles. Crop Prot 20:5764
Johnson, AK, Roeth, FW, Martin, AR, Klein, RN (2006) Glyphosate spray drift management with drift-reducing nozzles and adjuvants. Weed Technol 20:893897
Knoche, M (1994) Effect of droplet size and carrier volume on performance of foliage-applied herbicides. Crop Prot 13:163178
Kudsk, P (2017) Optimising herbicide performance. Pages 149179 in Hatcher PE, Froud-Williams RJ, eds. Weed Research: Expanding Horizons. Hoboken, NJ: John Wiley & Sons, Ltd.
Lake, JR (1977) The effect of drop size and velocity on the performance of agricultural sprays. Pestic Sci 8:515520
Legleiter, TR, Johnson, WG (2016) Herbicide coverage in narrow row soybean as influenced by spray nozzle design and carrier volume. Crop Prot 83:18
Luck, JD, Sharda, A, Pitla, SK, Fulton, JP, Shearer, SA (2011) A case study concerning the effects of controller response and turning movements on application rate uniformity with a self-propelled sprayer. T ASABE 54:423431
Mangus, DL, Sharda, A, Engelhardt, A, Flippo, D, Strasser, R, Luck, JD, Griffin, T (2017) Analyzing the nozzle spray fan pattern of an agricultural sprayer using pulse-width modulation technology to generate an on-ground coverage map. T ASABE 60:315325
Massinon, M, De Cock, N, Forster, WA, Nairn, JJ, McCue, SW, Zabkiewicz, JA, Lebeau, F (2017) Spray droplet impaction outcomes for different plant species and spray formulations. Crop Prot 99:6575
Matthews, G, Bateman, R, Miller, P (2014) Pesticide Application Methods. 4th edn. West Sussex, UK: Wiley-Blackwell. 536 p
McKinlay, KS, Ashford, R, Ford, RJ (1974) Effects of drop size, spray volume, and dosage on paraquat toxicity. Weed Sci 22:3134
McKinlay, KS, Brandt, SA, Morse, P, Ashford, R (1972) Droplet size and phytotoxicity of herbicides. Weed Sci 20:450452
Meyer, CJ, Norsworthy, JK, Kruger, GR, Barber, T (2015) Influence of droplet size on efficacy of the formulated products Engenia™, Roundup PowerMax®, and Liberty®. Weed Technol 29:641652
Meyer, CJ, Norsworthy, JK, Kruger, GR, Barber, TL (2016a) Effect of nozzle selection and spray volume on droplet size and efficacy of Engenia tank-mix combinations. Weed Technol 30:377390
Meyer, CJ, Norsworthy, JK, Kruger, GR, Barber, TL (2016b) Effects of nozzle selection and ground speed on efficacy of Liberty and Engenia applications and their implication on commercial field applications. Weed Technol 30:401414
Nairn, JJ, Forster, WA, van Leeuwen, RM (2013) “Universal” spray droplet adhesion model––accounting for hairy leaves. Weed Res 53:407417
Norsworthy, JK, Korres, NE, Bagavathiannan, M V. (2018) Weed seedbank management: Revisiting how herbicides are evaluated. Weed Sci 66:415417
Ou, J, Thompson, CR, Stahlman, PW, Bloedow, N, Jugulam, M (2018) Reduced translocation of glyphosate and dicamba in combination contributes to poor control of Kochia scoparia: Evidence of herbicide antagonism. Sci Rep 8:111
Ozkan, HE (1987) Sprayer performance evaluation with microcomputers. Appl Eng Agric 3:3641
Prasad, R, Cadogan, BL (1992) Influence of droplet size and density on phytotoxicity of three herbicides. Weed Technol 6:415423
Sharda, A, Fulton, JP, McDonald, TP, Brodbeck, CJ (2011) Real-time nozzle flow uniformity when using automatic section control on agricultural sprayers. Comput Electron Agr 79:169179
Sharda, A, Luck, JD, Fulton, JP, McDonald, TP, Shearer, SA (2013) Field application uniformity and accuracy of two rate control systems with automatic section capabilities on agricultural sprayers. Precis Agr 14:307322
Spillman, JJ (1984) Spray impaction, retention, and adhesion––an introduction to basic characteristics. Pestic Sci 15:97106
Tian, L, Reid, J, Hummel, J (1999) Development of a precision sprayer for site-specific weed management. T ASAE 42:893900
Vieira, BC, Butts, TR, Rodrigues, AO, Golus, JA, Schroeder, K, Kruger, GR (2018) Spray particle drift mitigation using field corn (Zea mays L.) as a drift barrier. Pest Manag Sci 74:20382046
Westwood, JH, Charudattan, R, Duke, SO, Fennimore, SA, Marrone, P, Slaughter, DC, Swanton, C, Zollinger, R (2018) Weed management in 2050: Perspectives on the future of weed science. Weed Sci 66:275285
Wilkerson, GG, Price, AJ, Bennett, AC, Krueger, DW, Roberson, GT, Robinson, BL (2004) Evaluating the potential for site-specific herbicide application in soybean. Weed Technol 18:11011110
Wolf, TM (2002) Optimising herbicide performance––biological consequences of using low-drift nozzles. Int Adv Pestic Appl:7986
Womac, AR, Melnichenko, G, Steckel, LE, Montgomery, G, Hayes, RM (2016) Spray tip effect on glufosinate canopy deposits in Palmer amaranth (Amaranthus palmeri) for pulse-width modulation versus air-induction technologies. T ASABE 59:15971608
Womac, AR, Melnichenko, G, Steckel, LE, Montgomery, G, Reeves, J, Hayes, RM (2017) Spray tip configurations with pulse-width modulation for glufosinate-ammonium deposits in Palmer amaranth (Amaranthus palmeri). T ASABE 60:11231136

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