Comparative Performance of Different Weed Management Practices in System of Rice Intensification
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Author:Md. Latheef Pasha, L. Krishna, D. Bhadru and R.B.M. Naik
p-ISSN:0024-9602, e-ISSN:2582-5321, Vol:99, Issue:jul-sep
DOI: https://doi.org/10.29321/MAJ.10.100117
Abstract
A field study was conducted at Agricultural Research Station, Kampasagar, Andhra Pradesh
during kharif 2008-09 to evaluate the best weed management practice in System of Rice
Intensification. The experiment was laid out in randomized block design with eight weed
management treatments (T 1
- Pre emergence application of butachlor @ 1.5 kg a.i ha -1 , T2 -
cono weeding (CW) thrice at 15 days interval, T3 – T1 +T 2 , T 4 - T 1
+ hand weeding (HW) at 20 and
40 days after planting (DAP), T 5 - T 2 + HW at 20 and 40 DAP, T 6 - T 3 + HW at 20 and 40 DAP, T 7 - un
weeded check and T 8 - weed free). Weed density and weed dry matter were higher in un
weeded check followed by Butachlor application and cono weeding alone practices. Integrated
weed management practice of butachlor @ 1.5 kg a.i ha -1 combined with cono weeding thrice
at 15 days interval and hand weeding at 20 and 40 DAP recorded significantly higher yield
attributes and grain yield than the weedy check, butachlor @ 1.5 kg a.i ha -1 alone and cono
weeding thrice at 15 days interval alone practices. Combination of weed management
practices, integrated weed management practices and weed free check were comparable
with each other with respect to grain yield and yield attributes.
Key words : Butachlor, cono weeding, hand weeding, integrated weed management, system of rice
intensification