Effect of herbicides on weed management in dry-seeded rice sown under different tillage systems

Singh, Virender P., Dhyani, Vipin C., Singh, Shailendra P., Kumar, Abnish, Manalil, Sudheesh and Chauhan, Bhagirath S. (2016) Effect of herbicides on weed management in dry-seeded rice sown under different tillage systems. Crop Protection, 80 118-126. doi:10.1016/j.cropro.2015.09.018


Author Singh, Virender P.
Dhyani, Vipin C.
Singh, Shailendra P.
Kumar, Abnish
Manalil, Sudheesh
Chauhan, Bhagirath S.
Title Effect of herbicides on weed management in dry-seeded rice sown under different tillage systems
Journal name Crop Protection   Check publisher's open access policy
ISSN 0261-2194
1873-6904
Publication date 2016-02-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.cropro.2015.09.018
Open Access Status Not Open Access
Volume 80
Start page 118
End page 126
Total pages 9
Place of publication Amsterdam, NX, Netherlands
Publisher Elsevier
Language eng
Subject 1102 Agronomy and Crop Science
Abstract In India, dry-seeded rice (DSR) production systems are rapidly replacing conventional rice production systems due to various advantages. DSR systems can be managed under zero-till (ZT) conditions or after a preparatory tillage, often referred to as conventional tillage systems (CONT). Although previous reports indicate the contribution of tillage to weed suppression, the effect of one-time preparatory tillage in a DSR system could vary depending on the dominant weeds in the system, vertical seed distribution and the weed seed dynamics. A study was conducted to test the efficacy of ZT and CONT and their interaction with herbicide treatments on the weed population dynamics and rice grain yield in 2010 and 2011. Tillage systems did not affect weed emergence, weed biomass, tiller production and crop yield. However, herbicide treatments varied in their efficacy on individual weeds. Hand-weeding treatments and pendimethalin combined with hand weeding did not effectively control Cyperus rotundus L. and Panicum maximum Jacq. (a perennial grass weed with underground parts). The herbicide combination of metsulfuron and chlorimuron was effective in controlling C. rotundus but not grass weeds. This indicates the need for sequential applications of herbicides for grass weed control or integration of hand weeding to achieve broad-spectrum weed control. Apart from hand weeding (three times), treatment with penoxsulam–cyhalofop and pendimethalin followed by (fb) hand weeding resulted in low weed density, high tiller production and grain yield. The study clearly indicates that tillage does not always lead to weed suppression compared with ZT, and herbicides must be chosen based on the dominant weeds in a system. The results of this study are pertinent as herbicide-resistant weeds are rapidly evolving under continuous herbicide selection pressure, which warrants studies on enhancing productivity through low-input, environmentally friendly and sustainable production technology.
Keyword Asia
Direct-seeded rice
Tillage systems
Weed infestation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

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