Germination ecology of goosegrass (Eleusine indica): An important grass weed of rainfed rice

Chauhan, Bhagirath S. and Johnson, David E. (2008) Germination ecology of goosegrass (Eleusine indica): An important grass weed of rainfed rice. Weed Science, 56 5: 699-706. doi:10.1614/WS-08-048.1


Author Chauhan, Bhagirath S.
Johnson, David E.
Title Germination ecology of goosegrass (Eleusine indica): An important grass weed of rainfed rice
Formatted title
Germination ecology of goosegrass (Eleusine indica): An important grass weed of rainfed rice
Journal name Weed Science   Check publisher's open access policy
ISSN 0043-1745
1550-2759
Publication date 2008
Sub-type Article (original research)
DOI 10.1614/WS-08-048.1
Open Access Status
Volume 56
Issue 5
Start page 699
End page 706
Total pages 8
Place of publication Lawrence, KS, United States
Publisher Weed Science Society of America
Language eng
Abstract Goosegrass is considered one of the most important grassy weeds of rice, particularly in rain-fed environments. Experiments were conducted in laboratory, screenhouse, and field to study the germination ecology of goosegrass seeds. In the laboratory, germination was greater at higher alternating temperatures (30/20 and 35/25 C) than at the lowest alternating temperatures (25/15 C). An after-ripening period of at least 3 mo was required to improve the germination of goosegrass. Germination was tolerant of salt stress but sensitive to a high degree of water stress. A pH range of 5 to 10 did not influence seed germination (92 to 95%). In the screenhouse study, seedling emergence of goosegrass was greatest (82%) for seeds placed on the soil surface, but decreased exponentially after that, no seedlings emerged at a burial depth of 8 cm. Seedling emergence and seedling dry matter declined markedly with the addition of crop residue to the soil surface at rates equivalent to 4 to 6 ton (t) ha-1. In the field, seedling emergence of goosegrass was greater under zero-till (ZT; 16 to 18%) than under minimum tillage (MINT; 8 to 11%). Because seedling emergence was greater from surface-sown seeds and emergence was favored by ZT, this species is likely to become a problematic weed in ZT systems. The information gained from this study could be used in developing effective weed management strategies.
Keyword Depth
Emergence
Germination
Light
Residue
Temperature
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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