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Surfactant-Enhanced Control of Two Erythroxylum Species by Glyphosate

Published online by Cambridge University Press:  20 January 2017

Ronald T. Collins and
Charles S. Helling
Ronald T. Collins*
Affiliation:
Alternate Crops and Systems Laboratory, Agricultural Research Service, United States Department of Agriculture, BARC-W, 10300 Baltimore Avenue, Beltsville, MD 20705
Charles S. Helling
Affiliation:
Alternate Crops and Systems Laboratory, Agricultural Research Service, United States Department of Agriculture, BARC-W, 10300 Baltimore Avenue, Beltsville, MD 20705
*
Corresponding author's E-mail: rcollins@asrr.arsusda.gov
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Abstract

Glyphosate is the only herbicide used for controlling illicit coca (Erythroxylum coca and E. novogranatense), a source of cocaine. Because commercially available formulations of glyphosate were inconsistent in controlling coca, research was conducted in a large-scale aerial eradication program, greenhouse (in Maryland) and field (Hawaii), to develop more effective control systems. Sixteen surfactants (cationic, nonionic, or mixed) were tested with two commercial glyphosate herbicide formulations, in aqueous or oil-based carrier systems, for coca control. Ultimately, two glyphosate–surfactant systems (COC/OSI-U [a mixture of crop-oil concentrate, Agri-Dex® and organosilicone, Silwet L-77®] and CAT/ANA [cationic surfactant/anionic surfactant, Optima®]) were found that increased glyphosate phytotoxicity fourfold: 1.1 kg ae/ha of glyphosate + surfactant was equivalent to 4.4 kg ae/ha glyphosate without added surfactant, for both species. In consequence, the glyphosate mixture used in Colombia for coca eradication was modified with substantially improved results.

Keywords

Glyphosatecoca, selected taxa of the genus Erythroxylum, especially E. coca var. coca Lam, E. novogranatense var. novogranatense (Morris) Hieron, E. coca var. ipadu Plowman, and E. novogranatense var. truxillense (Rusby) PlowmanAdjuvantscoca controlherbicide carrier systemherbicide efficacynarcotic plantssurfactantsANA, anionic surfactantCAT, cationic surfactantCOC, crop-oil concentrateECC, E. coca var. cocaECI, E. coca var. ipaduENN, E. novogranatense var. novogranatenseENT, E. novogranatense var. truxillenseGly, glyphosate (isopropylamine salt)MSO, methylated seed oilNIS, nonionic surfactantOSI, organosilicone surfactantVO, vegetable oil

Information

Type
Commentary
Information
Weed Technology , Volume 16 , Issue 4 , December 2002, pp. 851 - 859
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

Anonymous. 1990. U.S. Department of State, Bureau of International Narcotics Matters. Environmental Assessment of the Use of Herbicides to Eradicate Illicit Coca Overseas (Revised). September 7, 1990. Washington, DC: U.S. Department of State, International Narcotics Matters. 134 p.Google Scholar
Anonymous. 2002. U.S. Department of State, Bureau of International Narcotics Law Enforcement Affairs (INL). International Narcotics Control Strategy Report: March 2002. Washington, DC: U.S. Department of State, International Narcotics Law Enforcement Affairs: Web page: http://www.state.gov/g/inl/rls/nrcrpt/2001. Accessed: March 6, 2002.Google Scholar
Bailey, B. A., Hebbar, K. P., Strem, M., Darlington, L. C., and Lumsden, R. D. 1997. An alginate prill formulation of Fusarium oxysporum Schlechtend: Fr. f. sp. erythroxyli for biocontrol of Erythroxylum coca var. coca . Biocontrol Sci. Technol. 7: 423–435.Google Scholar
Bailey, B. A., Hebbar, K. P., Strem, M., Lumsden, R. D., Darlington, L. C., Connick, W. J. Jr., and Daigle, D. J. 1998. Formulations of Fusarium oxysporum f. sp. erythroxyli for biocontrol of Erythroxylum coca var. coca . Weed Sci. 46: 682–689.Google Scholar
Coret, J. M. and Chamel, A. R. 1993. Influence of some nonionic surfactants on water sorption by isolated tomato fruit cuticles in relation to cuticular penetration of glyphosate. Pestic. Sci. 38: 27–32.Google Scholar
de Ruiter, H. and Meinen, E. 1998. Influence of water stress and surfactant on the efficacy, absorption, and translocation of glyphosate. Weed Sci. 46: 289–296.CrossRefGoogle Scholar
de Ruiter, H., Uffing, A. J. M., Meinen, E., and Prins, A. 1990. Influence of surfactants and plant species on the retention of spray solutions. Weed Sci. 38: 567–572.Google Scholar
Ferreira, J. F. S. and Reddy, K. N. 2000. Absorption and translocation of glyphosate in Erythroxylum coca and E. novogranatense . Weed Sci. 48: 193–199.Google Scholar
Ferreira, J. F. S., Smeda, R. J., and Duke, S. O. 1997. Control of coca plants (Erythroxylum coca and E. novogranatense) with glyphosate. Weed Sci. 45: 551–556.Google Scholar
Franz, J. E., Mao, M. K., and Sikorski, J. A. 1997. Glyphosate: A Unique Global Herbicide. ACS Monograph 189. Washington, DC: American Chemical Society. 653 p.Google Scholar
Gaskin, R. E. and Holloway, P. J. 1992. Some physicochemical factors influencing foliar uptake enhancement of glyphosate-mono(isopropylammonium) by polyoxyethylene surfactants. Pestic. Sci. 34: 195–206.Google Scholar
Hebbar, K. P., Lumsden, R. D., Lewis, J. A., Poch, S. M., and Bailey, B. A. 1998. Formulation of mycoherbicidal strains of Fusarium oxysporum . Weed Sci. 46: 501–507.Google Scholar
Helling, C. S. 1993. Coca Eradication in Panama: Final Technical Rep. Beltsville, MD: U.S. Department of Agriculture, Agricultural Research Service. 42 p.Google Scholar
Helling, C. S. 1997. Environmental fate of herbicides in Hawaii, Peru and Panama. In Environmental Behavior of Crop Protection Chemicals, STI/PUB/1003. Vienna: International Atomic Energy Agency. pp. 389–406.Google Scholar
Johnson, E. L. and Emche, S. D. 1994. Variation of alkaloid content in Erythroxylum coca leaves from leaf bud to leaf drop. Ann. Bot. 73: 645–650.CrossRefGoogle Scholar
Johnson, E. L., Schmidt, W. L., and Norman, H. A. 1997. Leaf flavonoids as chemotaxonomic markers for two Erythroxylum taxa. Z. Naturforsch. 52c: 577–585.Google Scholar
Johnson, E. L., Schmidt, W. L., and Norman, H. A. 1998. Flavonoids as markers for Erythroxylum taxa: E. coca var. ipadu and E. novogranatense var. truxillense . Biochem. Syst. Ecol. 26: 743–759.Google Scholar
Ku, H. S., Misich, G. J., Limpel, L. E., and Findak, D. C. 1989. Enhancement of glyphosate activity by a fatty amine ethoxylate adjuvant: a physiological investigation. In Chow, P.N.P., Grant, C. A., and Hinshalwood, A. M., eds. Adjuvants and Agrochemicals. Vol. I. Mode of Action and Physiological Activity. Boca Raton, FL: CRC Press. pp. 167–174.Google Scholar
McWhorter, C. G. and Ouzts, C. 1994. Leaf surface morphology of Erythroxylum sp. and droplet spread. Weed Sci. 42: 18–26.Google Scholar
Norsworthy, J. K., Burgos, N. R., and Oliver, L. R. 2001. Differences in weed tolerance to glyphosate involve different mechanism. Weed Technol. 15: 725–731.Google Scholar
[ONDCP] Office of National Drug Control Policy. 2001. The Economic Costs of Drug Abuse in the United States, 1992–1998. Publ. No. NCJ-190636. Washington, DC: Executive Office of the President. 104 p.Google Scholar
Plowman, T. 1979. The identity of Amazonian and Trujillo coca. Bot. Mus. Leafl. 27: 45–68.Google Scholar
Sands, D. C., Ford, E. J., Miller, R. V., Sally, B. K., McCarthy, M., Anderson, T. W., Weaver, M. B., Morgan, C. T., and Darlington, L. C. 1997. Characterization of a vascular wilt of Erythroxylum coca caused by Fusarium oxysporum f. sp. erythroxyli forma specialis nova. Plant Dis. 81: 501–504.Google Scholar
[SAS] Statistical Analysis Systems. 1997. SAS/STAT Software; Changes and Enhancements Through Release 6.12. Cary, NC: Statistical Analysis Systems Institute. pp. 571–702.Google Scholar
Sherrick, S. L., Holt, H. A., and Hess, F. D. 1986. Effects of adjuvants and environment during plant development on glyphosate absorption and translocation in field bindweed (Convolvulus arvensis). Weed Sci. 34: 811–816.Google Scholar
Williams, G. M., Kroes, R., and Munroe, I. C. 2000. Safety evaluation and risk assessment of the herbicide Roundup and its active ingredient, glyphosate, for humans. Regul. Toxicol. Pharmacol. 31: 117–165.Google Scholar