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Biology of Sourgrass and Its Competition with Buffelgrass and Guineagrass

Published online by Cambridge University Press:  12 June 2017

J.Y. Pyon ,
A.S. Whitney  and
R.K. Nishimoto
J.Y. Pyon
Affiliation:
Dep. Agron. and Soil Sci., Univ. of Hawaii, Honolulu, HI 96822
A.S. Whitney
Affiliation:
Dep. Agron. and Soil Sci., Univ. of Hawaii, Honolulu, HI 96822
R.K. Nishimoto
Affiliation:
Dep. Hort., Univ. of Hawaii, Honolulu, HI 96822
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Abstract

Establishment and early growth characteristics were defined for sourgrass [Trichachne insularis (L.) Nees], one of the most serious pasture weeds in Hawaii. Optimum germination of sourgrass seeds was obtained in the light at 30 C or with alternating temperatures of 20 and 30 C or 25 and 35 C. Germination in complete darkness was poor except at alternating 25 and 35 C. Sourgrass germinated better than buffelgrass (Cenchrus ciliaris L.) and guineagrass (Panicum maximum Jacq.) at low moisture tension. Sourgrass was capable of emerging from a maximum depth of 5 cm but percent emergence was greatly reduced at planting depths greater than 3 cm. Sourgrass flowering response to photoperiod was day-neutral. Under conditions of adequate moisture, the growth of sourgrass was severely suppressed when grown with buffelgrass, or/or guineagrass. If grazing is restricted, either of these grasses would be useful for controlling sourgrass.

Type
Research Article
Information
Weed Science , Volume 25 , Issue 2 , March 1977 , pp. 171 - 174
Copyright
Copyright © 1977 by the Weed Science Society of America 

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References

Literature Cited

1. Blaser, R.E., Taylor, T.H., Griffeth, W., and Skrdla, W. 1956. Seedling competition in establishing forage plants. Agron. J. 48:1–6.Google Scholar
2. Britton, N.L. 1918. Flora of Bermuda. Charles Scribner's Sons, New York, page 18.Google Scholar
3. Helmerick, R.H. and Pfeifer, R.P. 1954. Differential varietal responses of winter wheat germination and early growth to controlled limited moisture conditions. Agron. J. 46:560–562.Google Scholar
4. Hitchcock, A.S. and Chase, A. 1950. Manual of the Grasses of the United States. U.S. Dep. Agric. Misc. Publ. 200, page 570.Google Scholar
5. Hosaka, E.Y. and Thistle, A. 1954. Noxious Plants of the Hawaiian Ranges. Univ. of Hawaii, Coop. Ext. Serv. Bull. 62:32–33.Google Scholar
6. Milthorpe, F.L. 1961. The nature and analysis of competition between plants of different species. Symp. Soc. Exp. Biol. 15:330–355.Google Scholar
7. Motooka, P.S., Plucknett, D.L., and Saiki, D.F. 1967. Weed problems of pastures and ranges in Hawaii. Proc. Asian-Pacific Weed Control Interchange: 95–98.Google Scholar
8. Oakes, A.J. 1968. Replacing hurricane grass in pastures of the dry tropics. Trop. Agric. 45:235–241.Google Scholar
9. Peters, E.J. and Lowance, S.A. 1974. Fertility and management treatments to control broom sedge in pastures. Weed Sci. 22:201–205.CrossRefGoogle Scholar
10. Silveus, W.A. 1933. Classification and Description of Grasses. The Clegg Co. pages 479–480.Google Scholar