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WEED MANAGEMENT IN AEROBIC RICE: ROLE OF ESTABLISHMENT METHODS AND HERBICIDES

Published online by Cambridge University Press:  22 December 2017

SUSHMITA MUNDA ,
SANJOY SAHA ,
TOTAN ADAK  and
NITIPRASAD JAMBHULKAR
SUSHMITA MUNDA*
Affiliation:
Crop Production Division, ICAR- National Rice Research Institute, Cuttack, Odisha, 753 006, India
SANJOY SAHA
Affiliation:
Crop Production Division, ICAR- National Rice Research Institute, Cuttack, Odisha, 753 006, India
TOTAN ADAK
Affiliation:
Crop Protection Division, ICAR- National Rice Research Institute, Cuttack, Odisha, 753 006, India
NITIPRASAD JAMBHULKAR
Affiliation:
Social Science Division, ICAR- National Rice Research Institute, Cuttack, Odisha, 753 006, India
*
Corresponding author. Email: sustot@gmail.com
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Summary

Weed management in rice depends on establishment method and proper selection of herbicide. A field experiment was conducted during dry seasons of 2013 and 2014 to develop a robust strategy for effective weed management in aerobic rice system for tropical rice belts. The efficacy of post-emergent herbicides bispyribac-sodium, azimsulfuron and flucetosulfuron were evaluated under different rice establishment methods (row sowing, spot seeding and broadcasting). Grass weed species constituted 58–68% of the total weed density across the establishment methods in the weedy check treatment. The total weed density and weed biomass were lowest in spot seeding with azimsulfuron (35 g active ingredient (a.i.) ha−1) 30 and 60 days after sowing. Among herbicides, use of azimsulfuron caused the highest grain yield (5.2 Mg ha−1), realizing 72% increase in grain yield over the weedy check. Yields in row sowing and spot seeding were similar and the same was verified when comparing yields in plots treated with bispyribac-sodium and azimsulfuron. Based on our findings and considering both weed presence and grain yield, azimsulfuron in spot seeding can be recommended in aerobic rice.

Type
Research Article
Information
Experimental Agriculture , Volume 55 , Issue 1 , February 2019 , pp. 88 - 104
Copyright
Copyright © Cambridge University Press 2017 

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References

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