The critical period for weed control in dry-seeded rice

Singh, Manpreet, Bhullar, Makhan S. and Chauhan, Bhagirath S. (2014) The critical period for weed control in dry-seeded rice. Crop Protection, 66 80-85. doi:10.1016/j.cropro.2014.08.009

Author Singh, Manpreet
Bhullar, Makhan S.
Chauhan, Bhagirath S.
Title The critical period for weed control in dry-seeded rice
Journal name Crop Protection   Check publisher's open access policy
ISSN 0261-2194
Publication date 2014-09
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.cropro.2014.08.009
Open Access Status
Volume 66
Start page 80
End page 85
Total pages 6
Place of publication Amsterdam, The Netherlands
Publisher Elsevier Ltd
Collection year 2015
Language eng
Formatted abstract
The critical crop-weed competition period in a dry-seeded rice system is an important consideration in formulating weed management strategies. Field experiments were conducted in the summer seasons of 2012 and 2013 at the Punjab Agricultural University, Ludhiana, India, to determine the extent of yield loss in two different rice cultivars (PR 114 and PR 115) with different periods of weed interference. Twelve weed control timings were used to identify critical periods of weed competition in dry-seeded rice. PR 114, a long-duration rice cultivar (145 d) having slower initial growth than PR 115 (125 d), was more prone to yield losses. In both years, 100% yield loss was observed where weeds were not controlled throughout the season. In weed-free plots, the grain yield of PR 114 was 6.39-6.80 t ha-1, for PR 115, it was 6.49-6.87 t ha-1. Gompertz and logistic equations fitted to yield data in response to increasing periods of weed control and weed interference showed that, PR 114 had longer critical periods than PR 115. Critical weed-free periods to achieve 95% of weed-free yield for PR 114 was longer than for PR 115 by 31 days in 2012 and 26 days in 2013. Weed infestation also influenced the duration of critical periods. Higher weed pressure in 2012 than in 2013 increased the duration of the critical period of crop-weed competition in that year. The identification of critical crop-weed competition periods for different cultivars will facilitate improved decision-making regarding the timing of weed control and the adoption of cultivars having high weed-suppressing abilities. This will also contribute to the development of integrated weed management in dry-seeded rice systems.
Keyword Critical weed free period
Dry seeded rice
Weed competition
Weed infestation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Alliance for Agriculture and Food Innovation
Official 2015 Collection
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Citation counts: TR Web of Science Citation Count  Cited 5 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 5 times in Scopus Article | Citations
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Created: Fri, 03 Oct 2014, 09:57:54 EST by Bhagirath Chauhan on behalf of Centre for Plant Science