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Tolerance of Alfalfa (Medicago sativa) to EPTC

Published online by Cambridge University Press:  12 June 2017

J. H. Dawson
J. H. Dawson*
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Irrigated Agric. Res. and Ext. Center, Prosser, WA 99350
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Abstract

EPTC (S-ethyl dipropylthiocarbamate) did not reduce emergence of alfalfa (Medicago sativa L. ‘Vernal’) seedlings at 3 to 81 kg/ha in the greenhouse nor at 3 to 243 kg/ha in the field. No rate injured roots, but temporary foliar symptoms were present at all rates. Soaking seeds for 40 days in technical grade EPTC or for 8 days in water saturated with EPTC before seeding in untreated soil did not reduce emergence or injure the seedlings. Seedlings from seeds germinated in paper towels moistened with water saturated with EPTC grew normally when transferred to untreated soil. Alfalfa was injured if seedlings were exposed to EPTC after emergence, but it tolerated exposure to high concentrations during imbibition and germination of the seeds and elongation of the seedlings before they emerged from the soil. EPTC delayed seedling emergence by about 1 day. This effect was separate from that causing typical foliar symptoms.

Keywords

Seed germinationherbicide injury in crops
Type
Research Article
Information
Weed Science , Volume 31 , Issue 1 , January 1983 , pp. 103 - 108
Copyright
Copyright © 1983 Weed Science Society of America 

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References

Literature Cited

1. Dawson, J. H. 1963. Development of barnyardgrass seedlings and their response to EPTC. Weeds 11:60–67.Google Scholar
2. Dawson, J. H. 1980. Selective weed control from EPTC applied with seed of alfalfa (Medicago sativa). Weed Sci. 28:607–611.CrossRefGoogle Scholar
3. Dawson, J. H. 1981. Selective weed control with EPTC-treated seed of alfalfa (Medicago sativa). Weed Sci. 29:105–110.CrossRefGoogle Scholar
4. Dawson, J. H. and Harvey, R. G. 1981. Management systems for weeds in alfalfa. Pages 303–315 in Pimentel, David, ed., Handbook of Pest Management in Agriculture, CRC Press, Inc., Boca Raton, FL.Google Scholar
5. Peters, E. J. 1964. Pre-emergence, preplanting and postemergence herbicides for alfalfa and birdsfoot trefoil. Agron. J. 56:415–419.CrossRefGoogle Scholar
6. Peters, E. J. and Peters, R. A. 1972. Weeds and weed control. Pages 555–573 in Hanson, C. H., ed., Alfalfa Science and Technology. Am. Soc. Agron. Monograph 15.Google Scholar
7. Schreiber, M. M. 1960. Pre-emergence herbicides on alfalfa and birdsfoot trefoil. Weeds 8:291–299.CrossRefGoogle Scholar
8. Weed Science Society of America. 1979. Herbicide Handbook of the Weed Science Society of America. Fourth Edition, Weed Sci. Soc. Am., Champaign, IL. 479.Google Scholar