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Germination of Winter Annual Species from a Rangeland Community Treated by Paraquat

Published online by Cambridge University Press:  12 June 2017

Raymond A. Evans
Affiliation:
Agr. Res. Serv., U.S. Dep. of Agr., Renewable Resource Center, Univ. of Nevada, Reno, NV 89502
James A. Young
Affiliation:
Dep. of Agron., Univ. of California, Davis, CA 95616
Burgess L. Kay
Affiliation:
Univ. of California, Davis, CA 95616

Abstract

Three annual plant species — erect plantain (Plantago erecta Morris), common chickweed [Stellaria media (L.) Cyrill.], and silver hairgrass (Aira caryophyllea L.)—are commonly found and may dominate a unique flora on areas sprayed with paraquat (1,1′-dimethyl-4,4′-bipyridinium ion) in cismontane rangelands of California. The basis of this phenomenon is shown to be temperature-related germination requirements, novel seed characteristics, and lack of competition.

Type
Research Article
Copyright
Copyright © 1974 by the Weed Science Society of America 

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References

1. Evans, R.A., Eckert, R.E. Jr., and Kay, B.L. 1967. Wheatgrass establishment with paraquat and tillage on downy brome ranges. Weeds 15:5055.CrossRefGoogle Scholar
2. Evans, R.A., Holbo, H.R., Eckert, R.E. Jr., and Young, J.A. 1970. Functional environment of downy brome communities in relation to weed control and revegetation. Weed Sci. 18:154162.Google Scholar
3. Evans, R.A. and Young, J.A. 1970. Plant litter and establishment of alien annual species in rangeland communities. Weed Sci. 18:697703.Google Scholar
4. Evans, R.A. and young, J.A. 1972. Microsite requirements for establishment of annual rangeland weeds. Weed Sci. 20:350356.Google Scholar
5. Harper, J.L. and Benton, R.A., 1966. The behavior of seeds in the soil. II. The germination of seeds on the surface of a water supplying substrate. J. Ecol. 54:151166.CrossRefGoogle Scholar
6. Kay, B.L. and Owen, R.E. 1970. Paraquat for range seeding in cismontane California. Weed Sci. 18:238244.Google Scholar
7. Young, J.A., Evans, R.A., Gifford, R. O., and Eckert, R.E. Jr. 1970. Germination characteristics of three species of Cruciferae.Google Scholar
8. Young, J.A. and Evans, R.A. 1973. Mucilaginous seed coats. Weed Sci. 21:5254.Google Scholar
9. Young, J.A., Evans, R.A., and Kay, B.L. 1973. Temperature requirements for seed germination in an annual-type rangeland community. Agron. J. 65:656659.CrossRefGoogle Scholar

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