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Critical period of weed control in aerobic rice


Anwar, Md. Parvez and Juraimi, Abdul Shukor and Samedani, Batoul and Puteh, Adam and Man, Azmi (2012) Critical period of weed control in aerobic rice. The Scientific World Journal, 2012. art. no. 603043. pp. 1-10. ISSN 2356-6140; ESSN: 1537-744X


Critical period of weed control is the foundation of integrated weed management and, hence, can be considered the first step to design weed control strategy. To determine critical period of weed control of aerobic rice, field trials were conducted during 2010/2011 at Universiti Putra Malaysia. A quantitative series of treatments comprising two components, (a) increasing duration of weed interference and (b) increasing length of weed-free period, were imposed. Critical period was determined through Logistic and Gompertz equations. Critical period varied between seasons; in main season, it started earlier and lasted longer, as compared to off-season. The onset of the critical period was found relatively stable between seasons, while the end was more variable. Critical period was determined as 7–49 days after seeding in off-season and 7–53 days in main season to achieve 95% of weed-free yield, and 23–40 days in off-season and 21–43 days in main season to achieve 90% of weed-free yield. Since 5% yield loss level is not practical from economic view point, a 10% yield loss may be considered excellent from economic view point. Therefore, aerobic rice should be kept weed-free during 21–43 days for better yield and higher economic return.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Agriculture
Institute of Tropical Agriculture
DOI Number: https://doi.org/10.1100/2012/603043
Publisher: Hindawi Publishing Corporation
Keywords: Weed control; Critical period; Aerobic rice
Depositing User: Nabilah Mustapa
Date Deposited: 04 Jul 2017 02:46
Last Modified: 04 Jul 2017 02:46
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1100/2012/603043
URI: http://psasir.upm.edu.my/id/eprint/56163
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