Weedy rice (Oryza sativa f. spontanea) problems and management in wet direct-seeded rice (O. sativa L.) in the Mekong Delta of Vietnam

Chauhan, Bhagirath Singh, Namuco, Ofelia S., Ocampo, Leo Angelo L., Son, Tran thi Ngoc, Thu, Tran thi Anh, Nam, Nguyan N., Phuong, Le Ngoc and Bajwa, Ali Ahsan (2015) Weedy rice (Oryza sativa f. spontanea) problems and management in wet direct-seeded rice (O. sativa L.) in the Mekong Delta of Vietnam. Crop Protection, 78 40-47. doi:10.1016/j.cropro.2015.08.016


Author Chauhan, Bhagirath Singh
Namuco, Ofelia S.
Ocampo, Leo Angelo L.
Son, Tran thi Ngoc
Thu, Tran thi Anh
Nam, Nguyan N.
Phuong, Le Ngoc
Bajwa, Ali Ahsan
Title Weedy rice (Oryza sativa f. spontanea) problems and management in wet direct-seeded rice (O. sativa L.) in the Mekong Delta of Vietnam
Formatted title
Weedy rice (Oryza sativa f. spontanea) problems and management in wet direct-seeded rice (O. sativa L.) in the Mekong Delta of Vietnam
Journal name Crop Protection   Check publisher's open access policy
ISSN 0261-2194
1873-6904
Publication date 2015-12-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.cropro.2015.08.016
Open Access Status Not Open Access
Volume 78
Start page 40
End page 47
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2016
Language eng
Formatted abstract
Direct seeding has been practiced in the districts of Phuoc Thoi, Thoi Lai, and Co Do in the Mekong Delta region of Vietnam, where majority of the farmers practice wet direct-seeded rice (WDSR), Oryza sativa L., for crop establishment. WDSR reduces the cost of inputs such as labour, time, and water prior to crop establishment in the field. Like other rice systems, WDSR is beset by many constraints, foremost of which is weed infestation. Surveys were conducted for two consecutive dry seasons (2012 and 2013) among farmers and/or households (FH) in these three districts to document the cultural practices used and the accompanying production constraints in WDSR. The results showed seeding rates of up to 100–300 kg ha−1, using farmers' own seed stock. Farmers broadcast pre-germinated seeds manually because of limited (or no) access to drum seeders. The most important production constraint identified was severe weed infestation, particularly by grass species, such as Echinochloa crus-galli (L.) P. Beauv., Leptochloa chinensis (L.) Nees, O. sativa L. (as volunteers from previous seasons), and O. sativa f. spontanea or weedy rice. Most farmers were aware of the presence of weedy rice in their fields and the damage it does to the crop. They enumerated numerous strategies to improve current practices to manage weeds. Despite the constraints, yield across the sites for two years ranged from 6.27 to 8.27 t ha−1, which may be considered higher than those obtained from other rice ecosystems across Asia. This also highlights that there is further scope to increase the rice yield in weedy rice infested fields.
Keyword Direct-seeded rice
Farmers' practices
Oryza sativa f. spontanea
Wet direct-seeded rice
Weedy rice
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Queensland Alliance for Agriculture and Food Innovation
Official 2016 Collection
 
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