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Nigerian Weed Species: Intraspecific Competition

Published online by Cambridge University Press:  12 June 2017

M. A. O. Oladokun
M. A. O. Oladokun*
Affiliation:
Dep. of Agron., Univ. of Ibadan, Ibadan, Nigeria
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Abstract

Four weed species, eragrostis (Eragrostis tenella Roem. and Schult), cogongrass [Imperata cylindrica (L.) Beauv.], synedrella (Synedrella nodiflora Gaertn.) and tridax (Tridax procumbens L.) were planted at 5, 10, 15, 20 or 25 plants per pot. Competition affected shoot and root dry weights, height, and leaf number of all species and the reproductive characteristics of eragrostis and tridax. The interaction between species and plant density was also highly significant for shoot and root dry weights, height and leaf number. Individual plant height, shoot and root dry weights, leaf and node numbers, percent flowering per pot and the number of inflorescences produced decreased with increase in population density. This reduction was greatest in eragrostis followed by tridax. Synedrella (both disk and ray floret seeds) were least affected. There was no significant difference in the response of plants from disk floret seeds and ray floret seeds of synedrella.

Keywords

Eragrostis tenellaImperata cylindricaSyndrella nodifloraTridax procumbens

Information

Type
Research Article
Information
Weed Science , Volume 26 , Issue 6 , November 1978, pp. 713 - 718
Copyright
Copyright © 1978 by the Weed Science Society of America 

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References

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