Management of complex weed flora in dry-seeded rice

Bhullar, Makhan S., Kumar, Sunny, Kaur, Simerjeet, Kaur, Tarundeep, Singh, Jasvir, Yadav, Ramawatar, Chauhan, Bhagirath S. and Gill, Gurjeet (2016) Management of complex weed flora in dry-seeded rice. Crop Protection, 83 20-26. doi:10.1016/j.cropro.2016.01.012

Author Bhullar, Makhan S.
Kumar, Sunny
Kaur, Simerjeet
Kaur, Tarundeep
Singh, Jasvir
Yadav, Ramawatar
Chauhan, Bhagirath S.
Gill, Gurjeet
Title Management of complex weed flora in dry-seeded rice
Journal name Crop Protection   Check publisher's open access policy
ISSN 0261-2194
Publication date 2016-05
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.cropro.2016.01.012
Open Access Status Not Open Access
Volume 83
Start page 20
End page 26
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2017
Language eng
Formatted abstract
Dry-seeded rice has been introduced as an alternative to puddled hand-transplanted rice in the north Indian states of Punjab and Haryana. In dry-seeded rice, weed flora tends to be more diverse and weeds emerge in several flushes during the crop growth cycle and substantial yield reductions due to weed competition are quite common. The efficacy and compatibility of tank mixtures of different herbicides for the control of diverse weed flora in dry-seeded rice was evaluated in field experiments during the summer seasons of 2012 and 2013. The tank mixture of fenoxaprop with ethoxysulfuron improved the control of Echinochloa crus-galli and Echinochloa colona by 43–69% as compared to fenoxaprop alone while the tank-mix of azimsulfuron with fenoxaprop was antagonistic and reduced the control of Leptochloa chinensis by 86% as compared to fenoxaprop alone. Addition of azimsulfuron or ethoxysulfuron to bispyribac did not improve the control of grass weeds as compared to bispyribac alone. Weed control with the mixture of bispyribac and fenoxaprop varied over the two years. In 2012, bispyribac and fenoxaprop mixture was antagonistic for the control of Dactyloctenum aegyptium, Acrachne racemose, and L. chinensis but in 2013, there was no apparent antagonism and the addition of bispyribac to fenoxaprop reduced grass weed biomass as compared to fenoxaprop alone. In 2013, there was a strong negative correlation (r = −0.95, P < 0.001) between weed dry matter at 45 days after sowing and rice grain yield. According to the linear regression, rice crop is likely to produce no grain yield when weed dry matter exceeds 400 g m−2. Over the two seasons, fenoxaprop-ethoxysulfuron tank-mix produced similar grain yields (5.6–6.2 t ha−1) to the weed-free check (5.6–7.1 t ha−1). At the farmer fields, rice grain yield in the plots treated with pendimethalin followed by post-emergence bispyribac or a tank-mix of fenoxaprop + ethoxysulfuron ranged from 6.2 to 7.7 t ha−1 as compared to 5.3–5.6 t ha−1 in the plots treated with pendimethalin alone. The tank mixture of fenoxaprop with bispyribac needs further evaluation as this mixture has the potential to effectively control aerobic and aquatic grasses in dry-seeded rice. Single hand weeding prevented crop yield loss from weeds that escaped herbicide treatments only when it was performed within six weeks of sowing.
Keyword Dry-seeded rice
Herbicide interactions
Integrated weed management
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Queensland Alliance for Agriculture and Food Innovation
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