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Droplet Makeup and the Effect on Phytotoxicity of Glyphosate in Velvetleaf (Abutilon theophrasti)

Published online by Cambridge University Press:  12 June 2017

John R. Cranmer  and
Dean L. Linscott
John R. Cranmer
Affiliation:
Cornell Univ. and Lead Sci., Cornell Univ., Ithaca, NY 14853
Dean L. Linscott
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Cornell Univ., Ithaca, NY 14853
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Abstract

Velvetleaf was treated at the three and one-half leaf stage with one, three, or nine drops (1 μl each) of glyphosate and an amphoteric surfactant with the concentration of the droplets adjusted so that the total amount of active ingredient applied to each plant was constant. The phytotoxicity of glyphosate to velvetleaf was dependent on both the concentration of glyphosate and surfactant within the droplet A single concentrated droplet of glyphosate and surfactant was more effective in reducing the growth of velvetleaf than were more dilute droplets in greater number but with the same total quantity of herbicide. If the surfactant concentration was increased, the loss in efficacy was negated, provided the glyphosate concentration in the droplet was sufficiently high. Also, loss in efficiency was negated at increased glyphosate concentration and diluted surfactant level per droplet. The phytotoxic response of velvetleaf treated with one or three drops was greater at 45 than 90% relative humidity. This greater response at low relative humidity continued with increased surfactant concentration in each drop. However, the phytotoxic response was greater at 90 than 45% relative humidity when velvetleaf plants were treated with nine drops. When the surfactant concentration in each drop was increased, the plant's response at the two relative humidity levels did not differ.

Keywords

Glyphosate, N-(phosphonomethyl)glycinevelvetleaf, Abutilon theophrasti Medic. # ABUTHSurfactantMON 0818MON 0139-3relative humidityABUTH
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 38 , Issue 4-5 , September 1990 , pp. 406 - 410
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

Literature Cited

1. Ambach, R. M. and Ashford, R. 1982. Effects of variations in drop makeup on the phytotoxicity of glyphosate. Weed Sci. 30:221–224.CrossRefGoogle Scholar
2. Bingham, S. W., Segura, J., and Foy, C. L. 1980. Susceptibility of several grasses to glyphosate. Weed Sci. 28:579–585.Google Scholar
3. Buhler, D. D. and Burnside, O. C. 1983. Effect of spray components on glyphosate toxicity to annual grasses. Weed Sci. 31:124–130.Google Scholar
4. Buhler, D. D. and Burnside, O. C. 1983. Effect of water quality, carrier volume, and acid on glyphosate phytotoxicity. Weed Sci. 31:163–169.Google Scholar
5. Buhler, D. D. and Burnside, O. C. 1987. Effects of application variables on glyphosate phytotoxicity. Weed Technol. 1:14–17.Google Scholar
6. Casely, J. C. and Coupland, D. 1985. Environmental and plant factors affecting glyphosate uptake, movement and activity. Pages 92–123 in The Herbicide Glyphosate. Grossbard, E. and Atkinson, D., eds. Butterworth and Co., Ltd., London, England.Google Scholar
7. Dewey, S. A. and Appleby, A. P. 1983. A comparison between glyphosate and assimilate translocation patterns in tall morningglory (Ipomoea purpurea). Weed Sci. 31:308–314.CrossRefGoogle Scholar
8. Erickson, C. G. 1981. The effect of glyphosate and surfactant concentrations in quackgrass [Agropyron repens (L.) Beauv.] control and foliar absorption. PhD. Thesis. Cornell University, Ithaca, NY. 63 pp.Google Scholar
9. Jordan, T. N. 1981. Effects of diluent volumes and surfactant on the phytotoxicity of glyphosate to bermudagrass (Cynodon dactylon). Weed Sci. 29:79–83.Google Scholar
10. Klevorn, T. B. and Wyse, D. L. 1984. Effect of leaf girdling and rhizome girdling on glyphosate transport in quackgrass (Agropyron repens). Weed Sci. 32:744–750.Google Scholar
11. Majek, B. A. 1980. The effect of environmental factors on quackgrass (Agropyron repens (L.) Beauv.] growth and glyphosate penetration and translocation. Ph.D. Thesis. Cornell University, Ithaca, NY. 59 pp.Google Scholar
12. Merritt, C. R. 1982. The influence of form of deposit on the phytotoxicity of MCPA, paraquat and glyphosate applied as individual drops. Ann. Appl. Biol. 101:527–532.Google Scholar
13. Muzik, T. J. 1976. Influence of environmental factors on toxicity to plants. Pages 203–247 in Herbicides: Physiology, Biochemistry, Ecology. Vol. 2. Audus, L. J., ed. Academic Press, New York.Google Scholar
14. Price, C. E. 1982. A review of the factors influencing the penetration of pesticides through plant leaves. Pages 237–252 in The Plant Cuticle. Cutler, D. F., Alvin, K. L., and Price, C. E., eds. Academic Press, New York.Google Scholar
15. Richard, E. P. Jr. and Slife, F. W. 1979. In vivo and in vitro characterization of the foliar entry of glyphosate in hemp dogbane (Apocynum cannabinum). Weed Sci. 27:426–433.Google Scholar
16. Sargent, J. A. and Blackman, G. E. 1962. Studies on foliar penetration. I. Factors controlling the entry of 2,4-dichlorophenoxyacetic acid. J. Exp. Bot 13:348–368.Google Scholar
17. Sargent, J. A. and Blackman, G. E. 1965. Studies on foliar penetration. II. The role of light in determining the penetration of 2,4-dichlorophenoxyacetic acid. J. Exp. Bot. 16:24–47.CrossRefGoogle Scholar
18. Sargent, J. A. and Blackman, G. E. 1972. Studies on foliar penetration. IX. Patterns of penetration of 2,4-dichlorophenoxyacetic acid into the leaves of different species. J. Exp. Bot. 23:830–841.CrossRefGoogle Scholar
19. Segura, J., Bingham, S. W., and Foy, C. L. 1973. Phytotoxicity of glyphosate to Italian ryegrass (Lolium multiflorum) and red clover (Trifolium pratense). Weed Sci. 26:32–36.Google Scholar
20. Stahlman, P. W. and Phillips, W. M. 1979. Effects of water quality and spray volume on glyphosate phytotoxicity. Weed Sci. 27:38–41.Google Scholar