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Dormancy, Germination, and Emergence Characteristics of Fall Panicum (Panicum dichotomiflorum) Seed

Published online by Cambridge University Press:  12 June 2017

B. J. Brecke  and
W. B. Duke
B. J. Brecke
Affiliation:
Dep. Agron., Cornell Univ., Ithaca, New York 14853
W. B. Duke
Affiliation:
Dep. Agron., Cornell Univ., Ithaca, New York 14853
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Abstract

Fall panicum (Panicum dichotomiflorum Michx.) seed were found to be dormant at harvest. This dormancy was overcome by an after-ripening period of 17 to 22 weeks, alternating germination temperatures (10 C for 16 h and 30 C for 8 h), stratification, and mechanical or chemical scarification. Soaking seed in gibberellic acid (GA3) or thiourea for 1 day, or washing seed in running tap water for up to 96 h before seed were placed in a germinator, had no effect on dormancy. In the greenhouse, fall panicum emergence was greatest (82%) when seed were placed on the growth media surface. The maximum number of seedlings (39%) emerged in the field when seed were placed 1.3 cm below the soil surface, although some emerged from as deep as 5.1 cm.

Keywords

Biologystratificationscarificationafter-ripeningdepth
Type
Research Article
Information
Weed Science , Volume 28 , Issue 6 , November 1980 , pp. 683 - 685
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

1. Amen, R. D. 1971. A model of seed dormancy. Bot. Rev. 34:1–31.Google Scholar
2. Brimhall, P. B. 1970. Modification in the weed flora due to weed control techniques. Proc. 2nd Int. Meet. Selective Weed Control Beet Crops, Rotterdam. 1:249.Google Scholar
3. Gould, F. W. 1951. Grasses of the southeastern United States. Univ. Ariz. Biol. Sci. Bull. 3:282–285.Google Scholar
4. Houghton, J. M. and Slife, F. W. 1969. Environmental factors that affect the development and control of Panicum species. Proc. North Cent. Weed Control Conf. 24:82.Google Scholar
5. Mayer, A. M. and Poljakoff-Mayber, A. 1963. The Germination of Seeds. Pergamon Press. 226 pp.Google Scholar
6. Parochetti, J. V. 1970. The ten worst weeds of field crops; panicums – fall panicum. Crops Soils 9:12–13.Google Scholar
7. Parochetti, J. V. 1974. Yellow nutsedge, giant green foxtail and fall panicum control in corn. Weed Sci. 22:80–82.CrossRefGoogle Scholar
8. Schnappinger, M. C. Jr. and Wilson, H. P. 1972. Ratios of atrazine and simazine for the control of fall panicum in corn. Proc. Northeast Weed Sci. Soc. 27:4–9.Google Scholar