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Control of coca plants (Erythroxylum coca and E. novogranatense) with glyphosate

Published online by Cambridge University Press:  12 June 2017

Jorge F. S. Ferreira,
Reid J. Smeda and
Stephen O. Duke
Reid J. Smeda
Affiliation:
U.S. Department of Agriculture, Agricultural Research Service, Southern Weed Science Laboratory, Stoneville, MS 38776-0350
Stephen O. Duke
Affiliation:
U.S. Department of Agriculture, Agricultural Research Service, Southern Weed Science Laboratory, Stoneville, MS 38776-0350
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Abstract

Glyphosate applied at rates of 0, 0.3, 0.6, 1.1, 2.2, 3.4, 4.5, 6.7, 9.0, and 13.4 kg ai ha−1 was evaluated for the control of greenhouse-grown Erythroxylum novogranatense var. novogranatense and E. coca var. coca plants. Glyphosate reduced live weight of both species, 6 wk after treatment, at rates as low as 0.6 kg ha−1, but was more effective in reducing live weight and regrowth on E. novogranatense than E. coca. Glyphosate at 1.1 kg ha−1 killed 100% of E. novogranatense plants 5 mo after treatment. Glyphosate rates of 2.2 kg ha−1 and higher reduced regrowth of E. coca plants 65 to 100%, independent of leaf age at time of spraying. Control of regrowth persisted for over 17 mo after treatment, with 37% of E. coca plants dying at rates of 13.4 kg ha−1 between 6 mo and 1 yr after treatment. Glyphosate, applied up to 6.7 kg ha−1, had no significant effect on regrowth of E. coca when plants were defoliated 24 h before treatment. Glyphosate at 2.2 kg ha−1 effectively killed E. novogranatense plants and reduced leaf production of E. coca plants.

Keywords

Glyphosate, N-(phosphonomethyl)glycinecoca, Erythroxylum coca var. coca Lam. and E. novogranatense var. novogranatense (Morris) HieronErythroxylaceaeillicit cropsnarcotic plants

Information

Type
Weed Management
Information
Weed Science , Volume 45 , Issue 4 , August 1997, pp. 551 - 556
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

Literature Cited

Baker, E. A. and Hunt, G. M. 1986. Erosion of waxes from leaf surfaces by simulated rain. New Phytol. 102: 161–173.Google Scholar
Dalby, P. R., Baker, G. H., and Smith, S. E. 1995. Glyphosate, 2,4-DB and dimethoate effects on earthworm survival and growth. Soil Biol. Biochem. 27: 1661–1662.CrossRefGoogle 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.Google Scholar
Liu, L., Punja, Z. K., and Rahe, J. E. 1995. Effect of Pythium spp and glyphosate on phytoalexin production and exudation by bean (Phaseolus vulgaris L.) roots grown in different media. Physiol. Mol. Plant Pathol. 47: 391–405.Google Scholar
Lydon, J. and Duke, S. O. 1993. The role of pesticides on host allelopathy and their effects on allelopathic compounds. in Altman, J., ed. Pesticide Interactions in Crop Production, Beneficial and Deleterious Effects. Boca Raton, FL: CRC Press, pp. 37–56.Google Scholar
Mayeux, H.S. Jr. and Jordan, W. R. 1987. Rainfall removes epicuticular waxes from Isocoma leaves. Bot. Gaz. 148: 420–425.CrossRefGoogle Scholar
McWhorter, C. and Ouzts, C. 1994. Leaf surface morphology of Erythroxylum sp. and droplet spread. Weed Sci. 42: 18–26.Google Scholar
Neskovic, N. K., Poleksic, V., Elezovic, I., Karan, V., and Budimir, M. 1996. Biochemical and histopathological effects of glyphosate on carp, Cyprinus carpio L. Bull. Environ. Contam. Toxicol. 56: 295–302.Google Scholar
Plowman, T. 1979. The identity of Amazonian and Trujillo coca. Bot. Mus. Leafl. 27: 45–68.Google Scholar
Rahe, J. E., Lévesque, C. A., and Johal, G. S. 1990. Synergistic role of soil fungi in the herbicidal efficacy of glyphosate. in Hoagland, R. E., ed. Microbes and Microbial Products as Herbicides (ACS Symposium Series). Washington, DC: American Chemical Society, pp. 260–275.Google Scholar
Rueppel, M. L., Brightwell, B. B., Schaefer, J., and Marvel, J. T. 1977. Metabolism and degradation of glyphosate in soil and water. J. Agric. Food Chem. 25: 517–528.Google Scholar
[SAS] Statistical Analysis Systems. 1990. SAS Procedures Guide. Version 6, 4th ed. Cary, NC: Statistical Analysis Systems Institute.Google Scholar
[USDA] U.S. Department of Agriculture. 1984. Herbicide background statement: glyphosate. in Pesticide Background Statement. Volume 1 (Herbicides). Forest Service, Agricultural Handbook No. 633. Washington, DC: U.S. Department of Agriculture, pp. G1–G72.Google Scholar