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British Journal of Applied Science & Technology, ISSN: 2231-0843,Vol.: 21, Issue.: 5

Original-research-article

Weed Control in Direct Seeded Rice Using New Herbicide Combination under Indian Tropical Condition

 

R. Sathya Priya1*, C. Chinnusamy2, P. Murali Arthanari1 and P. Janaki3

1Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India. 

2PI (AICRP-WM), Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India.

3Deprtment of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India.

Article Information
Editor(s):
(1) Borislav Banjac, Department of Field and Vegetable Crops, University of Novi Sad, Serbia.
Reviewers:
(1) Bilal Ahmad Lone, Shere-e Kashmir University of Agricultural Sciences and Technology, India.
(2) Sheeja K. Raj, Coconut Research Station, India.
Complete Peer review History: http://www.sciencedomain.org/review-history/19906

Abstracts

Direct seeded rice (DSR) is gaining momentum in India due to acute labour shortage during the peak period of transplanting and shortage of water. Weeds are the major biological constrain in DSR and its management contributes a major share in cost of production, as crop and weed emerge simultaneously and exerts competition right from the beginning of the crop. Field experiments were conducted in rabi 2013 and 2014 to study the effect of new herbicide combination, bispyribac sodium + metamifop 14% SE on weed control in DSR and their residual effect on succeeding greengram. Results revealed that the post-emergence (POE) application of herbicide combination, bispyribac sodium + metamifop 14% SE at 70 g ha-1 with wetter recorded significantly lower total weed density (25.78 and 24.19 plants m-2 respectively, during 2013 and 2014), total weed biomass (24.89 g m-2 and 34.56 g m-2 respectively, during 2013 and 2014) and higher weed control efficiency (80.07 and 81.68% respectively, during 2013 and 2014). Application of bispyribac sodium + metamifop 14% SE at 70 g ha-1 along with wetter (100 mL ha-1) recorded higher grain yield of 5676 and 6388 kg ha-1 respectively, during both the years. Weedy check recorded the lower grain yield and recorded the higher weed index of 51.83 and 52.85% respectively, during both the years. Succeeding crop of greengram was not affected by the residue of bispyribac sodium + metamifop 14% SE at all the tested doses.

Keywords :

DSR; herbicide combination; weed density; weed biomass; WCE; grain yield.

Full Article - PDF    Page 1-14

DOI : 10.9734/BJAST/2017/34088

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