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Effects of Ultra-low Volume Application on Herbicide Efficacy Using Oil Diluents as Carriers

Published online by Cambridge University Press:  12 June 2017

Daren R. Bohannan
Affiliation:
Dep. Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
Thomas N. Jordan
Affiliation:
Dep. Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907

Abstract

The efficacy of postemergence herbicide applications was evaluated in the greenhouse and the field in 1993 and 1994, using variables of carrier volume and diluent type. Ultra-low volume (ULV) applications of herbicides using an air-assisted sprayer calibrated at a volume of 9.4 L/ha were compared to 94 and 187 L/ha applications with a conventional hydraulic system. In greenhouse studies, reduced rates of sethoxydim, clethodim, fluazifop-P, and quizalofop were used to compare the effects of carrier types and volumes on their efficacy to yellow foxtail. All herbicides applied in oil diluents at 9.4 L/ha, with the exception of fluazifop-P and quizalofop applied in soybean oil, provided better yellow foxtail control than when applied in water at 94 and 187 L/ha. Sethoxydim and clethodim applied at 25 and 16% of the recommended rate, respectively, provided over 90% control in both petroleum oil and methylated seed oil. Reduced rates of glyphosate in petroleum oil or soybean oil were more effective at reducing bermudagrass growth than in water or methylated seed oil. Activity of glyphosate in methylated seed oil was no more effective than in water. Field experiments were conducted to study the efficacy of ULV applications of sethoxydim, clethodim, fluazifop-P, imazethapyr, and bentazon. Rates of the postemergence grass herbicides could be reduced by applying them at ULV in oil diluents while maintaining annual grass control equal to that achieved with higher herbicide rates in larger volumes of water. Control of annual grasses and annual broadleaf weeds with bentazon and imazethapyr applied at ULV were inconsistent and did not provide acceptable weed control. This may be partially due to the poor suspension of these herbicides in oil carriers.

Type
Research
Copyright
Copyright © 1995 by the Weed Science Society of America 

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References

Literature Cited

1. Akesson, N. B., Bayer, D. E., and Yates, W. E. 1989. Application effects of vegetable oil additives and carriers on agricultural sprays. p. 122137 in Chow, P.N.P., Grant, C. A., Hinshalwood, A. M., and Simundsson, E., eds. Adjuvants and Agrochemicals, CRC Press, Inc., Boca Raton, FL.Google Scholar
2. Arnold, A. C. and Mumford, J. D. 1989. The development and use of vegetable oil adjuvants with pesticides in Western Europe. p. 2631 in Chow, P.N.P., Grant, C. A., Hinshalwood, A. M., and Simundsson, E. eds. Adjuvants and Agrochemicals, CRC Press, Inc., Boca Raton, FL.Google Scholar
3. Barrentine, W. L., Hurst, H. R., and Dale, J. E. 1983. Soybean vs. petroleum oil adjuvants in soybean weed control. J. Am. Oil Chem. Soc. 60:744.Google Scholar
4. Bode, L. E. 1988. Spray application technology. p. 85110 in Mcwhorter, C. G. and Gebhardt, M.R., eds. Methods of Applying Herbicides. Weed Sci. Soc. Am., Champaign, IL.Google Scholar
5. Buhler, D. D. and Burnside, O. C. 1984. Effects of application factors on postemergence phytotoxicity of fluazifop-butyl, haloxyfop-methyl, and sethoxydim. Weed Sci. 32:574583.Google Scholar
6. Cantwell, J. R. and Kapusta, G. 1986. Application of bentazon and sethoxydim in soybean oil with rotary atomizers. Agron. J. 78:478482.Google Scholar
7. Ennis, W. B. Jr. and Williamson, R. E. 1963. Influence of droplet size on effectiveness of low-volume herbicidal sprays. Weeds 11:6772.Google Scholar
8. Foy, C. L. 1989. Adjuvants for agrochemicals: Historical overview and future look. p. 29 in Chow, P.N.P., Grant, C. A., Hinshalwood, A. M., and Simundsson, E., eds. Adjuvants and Agrochemicals. CRC Press, Inc., Boca Raton, FL.Google Scholar
9. Gebhardt, M. R. 1988. Rotary disk atomization. Weed Technol. 2:106113.CrossRefGoogle Scholar
10. Gebhardt, M. R. and Kapusta, G. 1988. Rotary Atomization. p. 111121 in McWhorter, C. G. and Gebhardt, M. R., eds. Methods of Applying Herbicides. Weed Sci. Soc. Am., Champaign, IL.Google Scholar
11. Hall, F. R. 1985. Improving agrochemical and fertilizer application technology. Agricultural Research Institute, Bethesda, MD. 148 p.Google Scholar
12. Hall, F. R., Reed, J. P., Reichard, D. L., Riedel, R. M., and Lehtinen, J. 1990. Pesticide delivery systems: spray distribution and partitioning in plant canopies. p. 184203 in Bode, L. E., Hazen, J. L., and Chasin, D. G., eds. Pesticide Formulations and Application Systems: 10th vol. ASTM STP 1078. Am. Soc. Test. Mater., Philadelphia, PA.Google Scholar
13. Hanks, J. E., Fulgham, F. E., and Womac, A. R. 1989. Low-volume application of herbicides using pneumatic droplet atomizers with three diluents. ASAE Pap. No. 891521. Am. Soc. Agric. Eng., St. Joseph, MI.Google Scholar
14. Hanks, J. E. and McWhorter, C. G. 1991. Variables affecting the use of positive displacement pumps to apply herbicides in ultra-low volume. Weed Technol. 5:111116.Google Scholar
15. Harker, K. N. 1992. Effects of various adjuvants on sethoxydim activity. Weed Technol. 6:865870.Google Scholar
16. Harrison, S. K., Wax, L. M., and Bode, L. E. 1986. Influence of adjuvants and application variables on postemergence weed control with bentazon and sethoxydim. Weed Sci. 34:462466.Google Scholar
17. Hartzler, R. G. and Foy, C. L. 1983. Efficacy of three postemergence grass herbicides for soybeans. Weed Sci. 31:557561.Google Scholar
18. Hess, F. D. 1994. Research needs in weed science. Weed Technol. 8:408409.Google Scholar
19. Jordan, T. N. 1981. Effects of diluent volumes and surfactant on the phytotoxicity of glyphosate to bermudagrass (Cynodon dactylon). Weed Sci. 29:7983.Google Scholar
20. Manthey, F. A., Nalewaja, J. D., and Szelezniak, E. F. 1989. Esterified seed oils with herbicides. p. 140147 in Chow, P.N.P., Grant, C. A., Hinshalwood, A. M., and Simundsson, E. eds. Adjuvants and Agrochemicals. CRC Press, Inc., Boca Raton, FL.Google Scholar
21. McWhorter, C. G. 1984. Future needs in weed science. Weed Sci. 32:850855.Google Scholar
22. McWhorter, C. G., Barrentine, W. L., and Hanks, J. E. 1992. Postemergence grass control with herbicides applied at ULV in paraffinic oil. Weed Technol. 6:262268.Google Scholar
23. McWhorter, C. G., Fulgham, F. E., and Barrentine, W. L. 1988. An air-assist spray nozzle for applying herbicides in ultra-low volume. Weed Sci. 36:118121.Google Scholar
24. McWhorter, C. G. and Gebhardt, M. R. 1987. Preface p. iii in McWhorter, C. G. and Gebhardt, M. R., eds. Methods of Applying Herbicides. Weed Sci. Soc Am, Champaign, IL.Google Scholar
25. McWhorter, C. G. and Hanks, J. E. 1993. Effect of spray volume and pressure on postemergence johnsongrass (Sorghum halepense) control. Weed Technol. 7:304310.Google Scholar
26. McWhorter, C. G., Ouzts, C., and Hanks, J. E. 1993. Spread of water and oil droplets on johnsongrass (Sorghum halepense) leaves. Weed Sci. 41:460467.Google Scholar
27. O'Sullivan, P. A., O'Donovan, J. T., and Hammon, W. M. 1981. Influence of non-ionic surfactants, ammonium sulfate, water quality, and spray volume on the phytotoxicity of glyphosate. Can. J. Plant Sci. 61:391400.Google Scholar
28. Prasad, R. and Cadogan, B. L. 1992. Influence of droplet size and density on phytotoxicity of three herbicides. Weed Technol. 6:415423.CrossRefGoogle Scholar
29. Rogers, R. B. 1989. The application of herbicides with ultra-small drops. p. 94101 in Chow, P.N.P., Grant, C. A., Hinshalwood, A. M., and Simundsson, E., eds. Adjuvants and Agrochemicals. CRC Press, Inc., Boca Raton, FL.Google Scholar
30. Wanamarta, G., Penner, D., and Kells, J. J. 1989. Identification of efficacious adjuvants for sethoxydim and bentazon. Weed Technol. 3:6066.Google Scholar
31. Williford, J. R. and Fulgham, F. E. 1989. The Teemizer—A new air-atomizing spray system. ASAE Paper No. 891522. Am. Soc. Agric. Eng., St. Joseph, MI.Google Scholar
32. Womac, A. R., Williford, J. R., and Hanks, J. E. 1990. Spray droplet size distributions of various nozzles. ASAE Paper No. 901004. Am. Soc. Agric. Eng., St. Joseph, MI.Google Scholar