International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 1
First page : (1046) Last page : (1050)
Article doi: http://dx.doi.org/10.18782/2320-7051.6201

Effectiveness of New Herbicides in the Management of Leptochloa chinensis in Direct Seeded Rice

Ajay Singh*, D. P. Nandal, S. S. Punia and Govind Prasad
Department of Agronomy,
CCS Haryana Agricultural University, Hisar -125 004, Haryana
*Corresponding Author E-mail: ajayyadavhau@gmail.com
Received: 26.01.2018  |  Revised: 22.02.2018   |  Accepted: 24.02.2018  

 ABSTRACT

A field experiment was conducted during the kharif 2012 at Students’ Farm of College of Agriculture, CCS Haryana Agricultural University; Kaul campus to study the effectiveness of new herbicides in management of Leptochloa chinensis in direct seeded rice. The herbicidal treatments included two pre emergence herbicides i.e. pendimethalin 1000 g/ha and oxadiargyl 100 g/ ha and four post emergence herbicides (bispyribac sodium 25 g/ha, fenoxaprop 67 g/ha, ethoxysulfuron 18.75 g/ha and metsulfuron methyl 10% + chlorimuron ethyl 10% WP ready mix (Almix) 4 g/ha). Weed free and weedy check were also included. The results showed that among herbicidal treatments, lowest density (4.5. 4.2 and 3.5/m2) and dry weight (8.5, 14.7 and 16.5 g/m2) of L. chinensis was obtained under pendimethalin 1000 g/ha fb fenoxaprop 67 g/ha at 75, 105 DAS and at harvest. Higher weed control efficiency from 45 DAS till harvest was obtained under pre emergence application of pendimethalin 1000 g/ha or oxadiargyl 100 g/ha followed by post-emergence application of fenoxaprop 67 g/ha alone or with ethoxysulfuron 18.75 g/ha, metsulfuron methyl + chlorimuron ethyl 4 g/ha. The regression analysis indicated that there was negative linear relationship between grain yield and dry weight of L. chinensis both at 45 DAS and at harvest (y = -0.0082x + 3.6213, R2= 0.1611 and y = -0.0036x + 3.5665, R2 =0.1017).

Key words: Grain yield, Kharif, Regression analysis, Weed control efficiency, Weed density

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Singh, A., Nandal, D.P., Punia, S.S. and Prasad, G., Effectiveness of New Herbicides in the Management of Leptochloa chinensis in Direct Seeded Rice, Int. J. Pure App. Biosci.6(1): 1046-1050 (2018). doi: http://dx.doi.org/10.18782/2320-7051.6201