Weed Management in Dry Direct Seeded Rice (Oryza sativa L.) in Bundelkhand Region
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Date
2022-08-05
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Banda University of Agriculture & Technology, Banda-210001,Uttar Pradesh, India
Abstract
Rice production systems are undergoing several changes and one of such changes is
shift from transplanted rice to direct seeding. Direct seeding rice serves several advantages
i.e. saves labour, faster and easier planting helps in timely sowing, less drudgery, early
crop maturity by 7-10 days, less water requirement, high tolerance to water deficit, often
high yield, low production cost and more profit, better soil physical condition and less
methane emission. Despite several advantages, various production obstacles are also
encountered and heavy weed infestation is major one. Weeds cause heavy damage to direct
seeded crop which can be to the tune of 5-100%. Considering these facts experiment was
carried out at research Farm, College of Agriculture, Banda University of Agriculture and
Technology, Banda during Kharif season of 2021. The research was carried out to find out
the cost effective herbicide for controlling weeds and to fine tune the dose of herbicide
with the impact of weed management practices on growth and yield of rice under dry direct
seeded conditions. The field experiment was laid out in Randomized Complete Block
Design (RCBD) with three replications. The treatment contains: T1 - Weedy Check, T2 -
Weed Free, T3 - Pendimethalin 1000g PE, T4 - Pendimethalin 1000g PE fb 2, 4-D 1000g
PoE, T5 - Pendimethalin 1000g PE fb Almix (Metsulfuron methyl + Chlorimuron Ethyl) 4g
PoE, T6 - Bispyribac Sodium 20g PoE, T7 – Pyrazosulfuron 20g PoE, T8 -Penoxulam 25g
PoE and T9 - Brown manuring.
During investigation several kind of weed flora observed in experimental crop were
Echinochloa crusgalli, Brachiaria reptans, Phyllanthus niruri, Centella asiatica, Digera
arvensis, Corchorus trilocularis, Crotolaria medicaginea, Abutilon theophasthi, and
Cyperus rotundus. Among observed weeds some were present in field during whole period
of crop growth, while some were in part of crop duration. Among several weeds grassy
weeds were in majority followed by BLWs and Sedges. Among grassy weeds Echinochloa
crusgalli was in majority fb Brachiaria reptans, likewise among broad leave weeds
Centella asiatica was major. Among herbicidal treatments Pendimethalin1000g PE fb
Almix (Metsulfuron methyl + Chlorimuron Ethyl) 4g PoE (T5) treatment proved efficient
method of weed management with higher weed control efficiency (%). Considering rice
yield and economics pendimethalin 1000g applied as pre emergence along with 500l of
water followed by Almix (Metsulfuron methyl + Chlorimuron Ethyl) 4g PoE (25 DAS)
along with 400l of water found cost effective and profitable option for weed management
in dry direct seeded rice.
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Citation
Sudhir Pal . 2022. Weed Management in Dry Direct Seeded Rice (Oryza sativa L.) in Bundelkhand Region. Thesis, M.Sc.