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Progressive Kill of Rhizomatous Johnsongrass (Sorghum Halepense) from Repeated Treatment with Dalapon, MSMA, or Asulam

  • Rex W. Millhollon (a1)

Abstract

Space-planted johnsongrass [Sorghum halepense (L.) Pers. ♯ SORHA] was clipped back to a height of 26 cm after flowering and, when 45 to 61 cm in height, was treated with various rates of the sodium salt of dalapon (2,2-dichloropropionic acid), MSMA (monosodium methanearsonate), or the sodium salt of asulam (methylsulfanilylcarbamate). Treatments were reapplied as needed during the growing season whenever a majority of surviving plants in a plot had initiated new foliar growth. Most plants were not killed by a single application of any herbicide, although rhizome development, as measured by the number of rhizome buds, was inhibited by the initial herbicide treatments. MSMA at 4.5 kg ai/ha was more phytotoxic to johnsongrass than other herbicide treatments or MSMA at 2.3 kg ai/ha; a single application at the higher rate reduced the original number of rhizome buds on plants by 50 to 60%, and two applications killed 86 to 93% of the plants. Asulam at 4.5 and 6.7 kg ae/ha and dalapon at 6.7 and 9.0 kg ae/ha primarily controlled plants by inhibiting growth for an extended period. After two or three applications of asulam or dalapon at 6.7 kg ae/ha, only about 40% of the plants had been killed, but the original number of rhizome buds on surviving plants had been reduced by about 80%.

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References

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1. Ashton, F. M. and Crafts, A. S. 1981. Mode of Action of Herbicides. John Wiley and Sons, New York.
2. Association of Official Agricultural Chemists, 1965. Official Methods of Analysis, 10th ed. Assoc. Offic. Agric. Chem., Washington, DC.
3. Catchpole, A. H. and Hibbitt, C. J. 1972. Studies on the retention, penetration and translocation of asulam in some perennial weed species. Proc. 11th Br. Crop Prot. Council: 7783.
4. Foy, C. L. 1975. The chlorinated aliphatic acids. Pages 399452 in Kearney, P. C. and Kaufman, D. D., eds. Herbicides, Vol. I. Marcel Dekker, New York.
5. Hamilton, K. C. 1969. Repeated foliar applications of herbicides on johnsongrass. Weed Sci. 17:245250.
6. Hull, R. J. 1969. Translocation of assimilates and dalapon in established johnsongrass. Weed Sci. 17:314320.
7. Ingle, M. and Rogers, B. J. 1961. Some physiological effects of 2,2-dichloropropionic acid. Weeds 9:264272.
8. Kogan, M. and Araya, A. 1974. Translocation of methylarsonate (MSMA) in Sorghum halepense (L.) Pers. and its effect on rhizome and root production. Assoc. Latinoam. Malezas, 2nd Congress: 7677.
9. McWhorter, C. G. and Jordan, T. N. 1976. Factors affecting dalapon absorption and translocation in johnsongrass. Physiol. Plant. 38:166170.
10. Millhollon, R. W. 1970. MSMA for johnsongrass control in sugarcane. Weed Sci. 18:333336.
11. Millhollon, R. W. 1976. Asulam for johnsongrass control in sugarcane. Weed Sci. 24:496499.
12. Millhollon, R. W. and Matherne, R. J. 1969. Tolerance of sugarcane varieties to herbicides. Weed Sci. 17:370373.

Keywords

Progressive Kill of Rhizomatous Johnsongrass (Sorghum Halepense) from Repeated Treatment with Dalapon, MSMA, or Asulam

  • Rex W. Millhollon (a1)

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