Germination ecology of two troublesome asteraceae species of rainfed rice: Siam weed (Chromolaena odorata) and coat buttons (Tridax procumbens)

Chauhan, Bhagirath S. and Johnson, David E. (2008) Germination ecology of two troublesome asteraceae species of rainfed rice: Siam weed (Chromolaena odorata) and coat buttons (Tridax procumbens). Weed Science, 56 4: 567-573. doi:10.1614/WS-07.200.1


Author Chauhan, Bhagirath S.
Johnson, David E.
Title Germination ecology of two troublesome asteraceae species of rainfed rice: Siam weed (Chromolaena odorata) and coat buttons (Tridax procumbens)
Formatted title
Germination ecology of two troublesome asteraceae species of rainfed rice: Siam weed (Chromolaena odorata) and coat buttons (Tridax procumbens)
Journal name Weed Science   Check publisher's open access policy
ISSN 0043-1745
1550-2759
Publication date 2008-01-01
Sub-type Article (original research)
DOI 10.1614/WS-07.200.1
Volume 56
Issue 4
Start page 567
End page 573
Total pages 7
Place of publication Lawrence, KS, United States
Publisher Weed Science Society of America
Language eng
Abstract Siam weed and coat buttons are among the most troublesome Asteraceae weed species of rainfed rice. The influence of various environmental factors on seed germination and seedling emergence of these weeds was determined. Germination response of both species was greater at the warmer fluctuating temperatures (30/20 and 35/25 C) than at the colder temperatures (25/15 C). Light stimulated germination in both species; however, some seeds still germinated in the dark. Both species were moderately tolerant of salt and water stress, but Siam weed tolerated more stresses than coat buttons. At the soil surface, Siam weed and coat buttons emergence was 75 and 76%, respectively, but this declined rapidly with increasing soil depths. Neither species emerged from depths exceeding 3 cm. Seedling emergence and seedling dry matter of both species were greatly reduced with the addition of crop residue to the soil surface at rates equivalent to 4 to 6 t ha-1. The information gained in this study will be used to facilitate development of effective weed control programs.
Keyword Burial depth
Emergence
Germination
Light
Residue
Seeds
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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