Germination ecology of southern crabgrass (Digitaria ciliaris) and India crabgrass (Digitaria longiflora): Two important weeds of rice in tropics

Chauhan, Bhagirath S. and Johnson, David E. (2008) Germination ecology of southern crabgrass (Digitaria ciliaris) and India crabgrass (Digitaria longiflora): Two important weeds of rice in tropics. Weed Science, 56 5: 722-728. doi:10.1614/WS-08-049.1


Author Chauhan, Bhagirath S.
Johnson, David E.
Title Germination ecology of southern crabgrass (Digitaria ciliaris) and India crabgrass (Digitaria longiflora): Two important weeds of rice in tropics
Formatted title
Germination ecology of southern crabgrass (Digitaria ciliaris) and India crabgrass (Digitaria longiflora): Two important weeds of rice in tropics
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-08-049.1
Volume 56
Issue 5
Start page 722
End page 728
Total pages 7
Place of publication Lawrence, KS, United States
Publisher Weed Science Society of America
Language eng
Abstract Southern and India crabgrass are important grass weeds of rice in many tropical countries. Environmental factors influenced seed germination and seedling emergence of these weeds. Seeds of both species germinated at a range of alternating temperatures (25/15, 30/20, and 35/25 C day/night), though the germination of southern crabgrass was reduced at the lowest alternating temperatures (25/15 C). Light stimulated germination of both species; however, a small proportion of southern crabgrass seeds germinated in the dark. Germination of India crabgrass was influenced to a greater degree by increasing salt and water stresses than was southern crabgrass. Seeds of both species germinated over a wide range of pH between 5 and 10. Seedling emergence of both species (98% for southern crabgrass and 94% for India crabgrass) was greatest for seeds placed on the soil surface. Seed burial depth of 2 cm completely inhibited emergence of India crabgrass, whereas for southern crabgrass, this depth was 8 cm. Knowledge gained from this study is expected to contribute to developing components of integrated weed management strategies for these species.
Keyword Burial depth
Emergence
Germination
Light
Residue
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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