Effect of Weed Management Practices on Growth and Yield of Machine Transplanted Rice
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Author:P. Sundara Pandian1* and N. Thavaprakaash2
p-ISSN:0024-9602, Vol:105, Issue:10-12, Page No:553
DOI:10.29321/MAJ 2018.000202
Abstract
A field experiment was conducted at Wetland farms of Tamil Nadu Agricultural
University, Coimbatore to evaluate the different weed management practices
on growth and productivity of rice variety CO 51 during late Samba,
2017-18. The experiment consisted of eight treatments viz., Unweeded
check (T1); Pretilachlor @ 1 kg a.i. ha-1 (PE) followed by hand weeding at
20 DAT (T2); Pretilachlor @ 1 kg a.i. ha-1 (PE) followed by Metsulfuron methyl
+ Chlorimuron ethyl @ 4 g a.i. ha-1 (POE) at 20 DAT (T3), Pretilachlor @ 1 kg
a.i. ha-1 (PE) followed by Power weeder at 20 DAT (T4); Pretilachlor @ 1 kg
a.i. ha-1 (PE) followed by Power weeder at 20 and 35 DAT (T5); Pretilachlor
@ 1 kg a.i. ha-1 (PE) followed by Power weeder at 20, 30 and 40 DAT (T6);
Power weeder at 20 and 35 DAT (T7); Power weeder at 20, 30 and 40 DAT
(T8). The experiment was conducted in RCBD and replicated thrice. The
results revealed that the application of Pretilachlor combined with either
hand weeding on 20 DAT (T2) or with power weeding twice (T5) or thrice
(T6) or with chemical combinations had registered more LAI, drymatter
production, number of tillers m-2, resulted more productive tillers m-2, filled
grains panicles-1, panicle length which ultimately resulted in higher grain
and straw yields.
Key words : Growth parameters, Machine transplanted rice, Weed management, Yield.
