Management of blood grass (Isachne miliacea Roth ex Roem et Schult) in wetland rice
Keywords:
Tillage, water regime, weed management, blood grass, grain yieldAbstract
Field experiments were conducted during Kharif and Rabi seasons of 2015 at the State seed farm, Kottarakkara, Kerala in a wetland field heavily infested with blood grass (Isachne milacea Roth ex Roem et Schult ) to develop an effective strategy for managing the weed. The experiment was laid out in a split plot design with combinations of tillage and water regimes as main plot treatments and weed management practices as sub-plot treatments. The results revealed that an integrated strategy involving intensive tillage (three ploughings fb puddling), deep water ponding (i.e., > 7.5 cm up to panicle initiation and saturation thereafter) and application of azimsulfuron @ 35 g ha-1 at 3-5 leaf stage of the weed was the most efficient treatment for managing the weed in terms of weed control efficiency (WCE), crop performance and net income. Combining these modified cultural practices with either (bispyribac sodium + metamifop) @ 70 g ha-1 or fenoxaprop-p-ethyl @ 60 g ha-1 were alternate strategies for management of this noxious wetland weed. Pre-plant application of oxyflourfen @ 0.15 kg ha-1 fb hand weeding when combined with deep water ponding and intensive tillage recorded high WCE, but was inferior in terms of economics. Combinations with manual weeding though uneconomic, were efficient in managing the weed, and recorded higher yield and hence could be an option for organic rice cultivation.References
Babu, D. S., George, S. and Nishan, M. A. 2014. Autecology of blood grass in wetland rice ecosystem . Indian J. Weed Sci. 46: 298-299.
---------------------------------------------------------------------------------
Baltzar, A. M. and De Datta, S. K. 1992. Weed management in rice. Weed Abstr., 41: 495-508.
-----------------------------------------------------------------------------
Bhagat, R. M., Bhuiyan, S. I. and Moody, K. 1996. Water, tillage and weed interactions in lowland tropical rice: a review. Agricultural Water Management 31. Elsevier, p. 165-184.
-----------------------------------------------------------------------------------
Chauhan, B. S., Kumar, V. and Mahajan, G. 2014. Research needs for improving weed management in rice. Imdian J. Weed Sci. 46(1): 1-13.
---------------------------------------------------------------------------------
Clements, D. R., Weise , S. F. and Swanton, C. J. 1994. Integrated weed management and weed species diversity. Phytoprotection, 75: 1-18.
--------------------------------------------------------------------------------
KAU [Kerala Agricultural University] 2011. Package of Practices Recommendations: Crops. Kerala Agricultural University, Thrissur , 360p.
----------------------------------------------------------------------------------
Kent, R. J. and Johnson, D. E. 2001. Influence of depth and duration on growth of lowland rice weeds, Cote d’Ivoire. Crop Prot. 20: 691-694.
------------------------------------------------------------------------------
Mani, V. S., Mala, M. L., Gautan, K. G. and Bhagavandas. 1973. Weed killing chemical in potato cultivation. Indian Farming 23:(1) 17-18.
----------------------------------------------------------------------------
Mukherjee, D. and Karmakar, R. 2015. Integrated weed management in transplanted rice. Int. J. Bioresources Sci. 2:(2) 139 p.
--------------------------------------------------------------------------
Philips, E. A. 1969. Methods of vegetation study. Henry Holt and co. Inc: Ecology Work Book 44 p.
--------------------------------------------------------------------------
Suada, A. P. 2015. Growth and physiology of Isachne miliacea Roth. in different soil types and its sensitivity to common herbicides. M.Sc. (Ag) Thesis, Kerala Agricultural University, Thrissur, 152p.
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Varughese, A. 1996. Ecophysiology and management of Isachne miliacea in rice field of Onattukara. Ph.D. Thesis, Kerala Agricultural University, Thrissur, 169 p.
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