Weed management in aerobic rice in northwestern Indo-Gangetic plains

2010 ◽  
pp. 297-312 ◽  
Author(s):  
G Mahajan ◽  
B Chauhan ◽  
D Johnson
Keyword(s):  
Weed Management ◽  
Aerobic Rice ◽  
Gangetic Plains

Weed Management in Aerobic Rice in Northwestern Indo-Gangetic Plains

2009 ◽  
Vol 23 (4) ◽  
pp. 366-382 ◽  
Author(s):  
G. Mahajan ◽  
B. S. Chauhan ◽  
D. E. Johnson
Keyword(s):  
Weed Management ◽  
Aerobic Rice ◽  
Gangetic Plains

Herbicide options for weed management in sugarcane + wheat intercropping system in indo-gangetic plains

2020 ◽  
Vol 52 (1) ◽  
pp. 32
Author(s):  
Dharam Bir Yadav ◽  
Mehar Chand ◽  
B.R. Kamboj ◽  
Ashok Yadav ◽  
S.S. Punia
Keyword(s):  
Weed Management ◽  
Gangetic Plains

Nitrogen and weed management in direct-seeded aerobic rice

2016 ◽  
Vol 48 (3) ◽  
pp. 319
Author(s):  
Gaurav Jain ◽  
C.S. Singh ◽  
Ashok Kumar Singh ◽  
Arvind Kumar Singh ◽  
S.K. Singh
Keyword(s):  
Weed Management ◽  
Aerobic Rice ◽  
Direct Seeded

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

2017 ◽  
Vol 55 (1) ◽  
pp. 88-104
Author(s):  
SUSHMITA MUNDA ◽  
SANJOY SAHA ◽  
TOTAN ADAK ◽  
NITIPRASAD JAMBHULKAR
Keyword(s):  
Grain Yield ◽  
Weed Management ◽  
Aerobic Rice ◽  
Weed Species ◽  
Weed Density ◽  
Establishment Method ◽  
Dry Seasons ◽  
Grass Weed ◽  
Selection Of

SUMMARYWeed 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.

scholarly journals Weed dynamics, weed control efficiency and yield of aerobic rice as influenced by different weed management practices in eastern U.P.

2020 ◽  
Vol 41 (6) ◽  
pp. 1735-1740
Author(s):  
R.K. Parihar ◽  
◽  
V.K. Srivastava ◽  
S. Kumar ◽  
V. Kumar ◽  
...  
Keyword(s):  
Grain Yield ◽  
Weed Control ◽  
Weed Management ◽  
Management Practices ◽  
Block Design ◽  
Aerobic Rice ◽  
Control Efficiency ◽  
Randomized Block Design ◽  
Weed Control Efficiency ◽  
Broad Leaf

Aim: To identify the best sequence of pre- and post-emergence herbicides for achieving better weed control efficiency in aerobic rice. Methodology: A field experiment was conducted in Randomized Block Design with eleven treatment combinations, replicated thrice.? The dominant weeds in field were C. dactylon, E. colona and E. crusgalli among grasses, C. rotundus, C. difformis and F. maliaceae among sedges and C. axillaris and P. niruri among broad-leaf weeds. Treatments consisting sequential application of two pre-emergence application [Pendimethalin (30 EC) @ 1.00 kg a.i. ha-1; Butachlor (50 EC) @ 1.5 kg a.i. ha-1] followed by three post emergence herbicides [Bispyribac-Na (10% SC) @ 35 g a.i. ha-1; 2, 4-D Na salt (80 WP) @ 0.06 kg a.i. ha-1; Almix (CME + MSM ) (20 WP) @ 40 g a.i. ha-1] and straw mulching @ 4 t ha-1;? Mechanical weeding at 20 and 45 DAS, weed free and unweeded check.? Results: Among herbicidal treatments, pre-emergence application of pendimethalin at 3-4 DAS fb Bispyribac-Na at 15-20 DAS as post-emergence was most effective in minimizing weed density (4.81 m-2), biomass (6.20 g m-2), weed index (1.11%) and in enhancing the weed control efficiency (84.50%), grain yield (3.68 t ha-1) and straw yield (4.87 t ha-1) over rest of the treatments. Interpretation: Sequential application of pendimethalin at 3-4 DAS fb bispyribac-Na at 15-20 DAS is prominent in enhancing herbicide efficacy and reducing weed flora abundance resulting in higher weed control efficiency and grain yield due to their broad spectrum weed control.

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